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{{Short description|Debate over the anti-tooth-decay measure}}
'''Water fluoridation opposition''' refers to activism against the ] of public water supplies. Concerns include the lack of quality research data available,<ref name=Limeback2000/> evidence that it may cause serious health problems,<ref name=SciAm>{{cite web |url=http://www.sciam.com/article.cfm?id=second-thoughts-on-fluoride |title=Second Thoughts on Fluoride |publisher=Scientific American}}.</ref><ref name=Colquhoun1998>{{cite journal | journal = Fluoride | volume = 31 | issue = 2 | year = 1998 | pages = 103–118 | author = John Colquhoun | title = Why I changed my mind about water fluoridation | url = http://www.fluoride-journal.com/98-31-2/312103.htm | format = reprinted from '']''}}</ref><ref>Second Look. </ref> and ethical issues.<ref name=FluorideDebateQ34>, website, accessed 23 February, 2006.</ref>
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{{Alternative medicine sidebar|conspiracy}}


The '''water fluoridation controversy''' arises from political, ethical, economic, and health considerations regarding the ] of public ]. For deprived groups in both maturing and matured countries, international and national agencies and dental associations across the world support the safety and effectiveness of water fluoridation.<ref name=Pizzo /> Proponents of water fluoridation see it as a question of public health policy and equate the issue to ] and ], citing significant benefits to dental health and minimal risks.<ref name=ethics>
==Ethics==
* {{cite journal | vauthors = McNally M, Downie J | title = The ethics of water fluoridation | journal = Journal | volume = 66 | issue = 11 | pages = 592–593 | date = December 2000 | pmid = 11253350 | url = http://cda-adc.ca/jcda/vol-66/issue-11/592.html }}
Many people who oppose water fluoridation consider it to be a form of compulsory mass ]. They argue that consent of all water consumers cannot be achieved, nor can water suppliers accurately control the exact levels of fluoride that individuals receive, nor monitor their response.<ref name=FluorideDebateQ34 /> It is also argued that, because of the negative health effects of fluoride exposure, mandatory fluoridation of public water supplies is a breach of ethics and a human rights violation.<ref>, website, accessed 22 February, 2006.</ref>
* {{cite journal | vauthors = Cohen H, Locker D | title = The science and ethics of water fluoridation | journal = Journal | volume = 67 | issue = 10 | pages = 578–580 | date = November 2001 | pmid = 11737979 | url = http://cda-adc.ca/jcda/vol-67/issue-10/578.html }}</ref><ref>Perrella, Andrea ML, and Simon J. Kiss. "Risk perception, psychological heuristics and the water fluoridation controversy." Canadian journal of public health 106.4 (2015): e197-e203.</ref> In contrast, opponents of water fluoridation view it as an infringement of individual rights, if not an outright violation of medical ethics,<ref name="Cross2003">{{cite journal | vauthors = Cross DW, Carton RJ | title = Fluoridation: a violation of medical ethics and human rights | journal = International Journal of Occupational and Environmental Health | volume = 9 | issue = 1 | pages = 24–29 | date = 1 March 2003 | pmid = 12749628 | doi = 10.1179/107735203800328830 | s2cid = 24127394 }}</ref> on the basis that individuals have no choice in the water that they drink, unless they drink more expensive bottled water.<ref name="Coggon">{{cite journal | vauthors = Coggon D, Cooper C | title = Fluoridation of water supplies. Debate on the ethics must be informed by sound science | journal = BMJ | volume = 319 | issue = 7205 | pages = 269–270 | date = July 1999 | pmid = 10426716 | pmc = 1126914 | doi = 10.1136/bmj.319.7205.269 }}</ref> A small minority of scientists have challenged the medical consensus, variously claiming that water fluoridation has no or little ] benefits, may cause serious health problems, is not effective enough to justify the costs, and is ] obsolete.<ref name="FRWG" /><ref name="Thiessen">{{cite journal | vauthors = Ko L, Thiessen KM | title = A critique of recent economic evaluations of community water fluoridation | journal = International Journal of Occupational and Environmental Health | volume = 21 | issue = 2 | pages = 91–120 | date = 3 December 2014 | pmid = 25471729 | pmc = 4457131 | doi = 10.1179/2049396714Y.0000000093 }}</ref><ref name="Hileman">{{cite journal | vauthors = Hileman B | date = 4 November 2006 | url = http://pubs.acs.org/email/cen/html/090506090615.html | title = Fluoride Risks Are Still A Challenge | volume = 84 | issue = 36 | pages = 34–37 | journal = ] | doi = 10.1021/cen-v084n036.p034 | access-date = 14 April 2016 }}</ref><ref name="Kaminsky">{{cite journal | vauthors = Krimsky S | author-link = Sheldon Krimsky | title = Book review: Is Fluoride Really All That Safe? | date = 16 August 2004 | url = http://pubs.acs.org/cen/books/8233/8233books.html | volume = 82 | issue = 33 | pages = 35–36 | journal = ] | doi = 10.1021/cen-v082n033.p035 | access-date = 19 April 2016 }}</ref>


Opposition to fluoridation has existed since its initiation in the 1940s.<ref name="Martin1989" /> During the 1950s and 1960s, now-debunked ] claimed that fluoridation was a ] plot to undermine American public health.<ref name="Johnston">{{cite book | vauthors = Johnston RD | title = The Politics of Healing | url = https://archive.org/details/politicshealingh00john | url-access = limited | publisher = Routledge | year = 2004 | isbn = 978-0-415-93339-1| page = }}</ref> In recent years, water fluoridation has become a prevalent health and political issue in many countries, resulting in some countries and communities discontinuing its use while others have expanded it.<ref name="Scher2011">{{cite web|title=Introduction to the SCHER opinion on Fluoridation|url=http://ec.europa.eu/health/scientific_committees/opinions_layman/fluoridation/en/l-3/1.htm#0|publisher=European Commission Scientific Committee on Health and Environmental Risks (SCHER)|access-date=18 April 2016|date=2011}}</ref><ref name="Tiemann2013" /> The controversy is propelled by a significant public opposition supported by a minority of professionals,<ref name="ReferenceA">{{cite journal | vauthors = Martin B | title = Analyzing the fluoridation controversy: resources and structures | journal = Social Studies of Science | volume = 18 | issue = 2 | pages = 331–363 | date = May 1988 | pmid = 11621556 | doi = 10.1177/030631288018002006 | s2cid = 31073263 }}</ref> which include researchers, dental and medical professionals, alternative medical practitioners, health food enthusiasts, a few religious groups (mostly ] in the U.S.), and occasionally consumer groups and environmentalists.<ref name="Reilly">{{cite book | vauthors = Reilly GA |chapter=The task is a political one: the promotion of fluoridation |pages=323–342 |title=Silent Victories: The History and Practice of Public Health in Twentieth-century America | veditors = Ward JW, Warren C |publisher=Oxford University Press |year=2007 |isbn=978-0-19-515069-8 }}</ref> Organized political opposition has come from ],<ref name="Dehnbase">{{cite web |url=http://www.dehnbase.org/lpus/library/platform/cp.html|title=Consumer protection |publisher=Libertarian Party |access-date= 28 June 2010}}</ref> the ],<ref name="Freeze_2009">{{cite book | vauthors = Freeze RA, Lehr JH |title=The fluoride wars: how a modest public health measure became America's longest-running political melodrama |location=Hoboken |publisher=Wiley |year=2009 |isbn=978-0-470-44833-5 }}</ref> the ],<ref name=":0">{{Cite journal |last=McNeil |first=Donald R. |date=1985 |title=America's Longest War: The Fight over Fluoridation, 1950– |url=https://www.jstor.org/stable/40256913 |journal=] |volume=9 |issue=3 |pages=140–153 |jstor=40256913 |pmid=11624732 |issn=0363-3276}}</ref> ], and ].<ref name="Greenwars">{{cite news |vauthors=Nordlinger J |title=Water fights: believe it or not, the fluoridation war still rages&nbsp;– with a twist you may like |work=Natl Rev |date=2003-06-30 |url=http://www.thefreelibrary.com/Water+Fights%3a+Believe+it+or+not%2c+the+fluoridation+war+still+rages+--...-a0103135852 }}{{Dead link|date=August 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
In the ] the ] refers to fluoride as a poison, claim that water fluoridation violates Article 35 of the ], is banned by the UK poisons act of 1972, violates Articles 3 and 8 of the ] and raises issues under the ].<ref> Water fluoridation contravenes UK law, EU directives and the European Convention on Human Rights and Biomedicine. A Green Party press office briefing. 8 July, 2003. ''Paragraphs 56, 57 and 59 of the Home Office Guidance Notes on the application of the Human Rights Act establish that fluoridation violates Articles 3 and 8 of the Human Rights Act, and also Articles 3 and 8 of the Convention. Since fluoridation is the illegal administration of a registered poison with no medicinal authorisation, it constitutes a State sanctioned criminal act against the public, and is incompatible with the Convention on Human Rights and the Convention on Human Rights and Biomedicine. Where children are involved - indeed, specifically targeted - such an act also raise issues under the United Nations Convention on the Rights of the Child.''</ref>


Proponents of fluoridation have been criticized for overstating the benefits, while opponents have been criticized for understating them and for overstating the risks.<ref name="ChengChalmers2007">{{cite journal | vauthors = Cheng KK, Chalmers I, Sheldon TA | title = Adding fluoride to water supplies | journal = BMJ | volume = 335 | issue = 7622 | pages = 699–702 | date = October 2007 | pmid = 17916854 | pmc = 2001050 | doi = 10.1136/bmj.39318.562951.BE }}</ref><ref name=yorkcrd /> ]s have cited the lack of high quality research for the benefits and risks of water fluoridation and questions that are still unsettled.<ref name=Scher2011 /><ref name=yorkcrd>{{cite web | work = Centre for Reviews and Dissemination | url = https://www.york.ac.uk/media/crd/Fluoridation%20Statement.pdf | title = What the 'York Review' on the fluoridation of drinking water really found | publisher = ] | location = York, United Kingdom | date = 28 October 2003 | access-date = 12 April 2016 }}</ref><ref name=Ih2015>{{cite journal | vauthors = Iheozor-Ejiofor Z, Worthington HV, Walsh T, O'Malley L, Clarkson JE, Macey R, Alam R, Tugwell P, Welch V, Glenny AM | display-authors = 6 | title = Water fluoridation for the prevention of dental caries | journal = The Cochrane Database of Systematic Reviews | volume = 6 | issue = 6 | pages = CD010856 | date = June 2015 | pmid = 26092033 | pmc = 6953324 | doi = 10.1002/14651858.CD010856.pub2 }}</ref>{{Update inline|reason=Updated version https://www.ncbi.nlm.nih.gov/pubmed/39362658|date = October 2024}} Researchers who oppose the practice state this as well.<ref name="Book Reviews 2011">{{cite journal| vauthors = Peckham S |title=Book Reviews: The case against fluoride: how hazardous waste ended up in our drinking water and the bad science and powerful politics that keep it there, by Paul Connett, James Beck, and H Spedding Micklem|journal=Critical Public Health|volume=22|issue=1|date=2012|pages=113–114|issn=0958-1596|doi=10.1080/09581596.2011.593350|s2cid=144744675}}</ref> According to a 2013 ] report on fluoride in drinking water, these gaps in the fluoridation scientific literature fuel the controversy.<ref name=Tiemann2013 />
Water fluoridation has also been criticized by Cross and Carton for violating the ] and the Council of Europe's Biomedical Convention of 1999.
<ref> Int J Occup Environ Health. 2003 Jan-Mar;9(1):24-9. Fluoridation: a violation of medical ethics and human rights. Cross DW, Carton RJ. ''"The ethical validity of fluoridation policy does not stand up to scrutiny relative to the Nuremberg Code and other codes of medical ethics, including the Council of Europe's Biomedical Convention of 1999."''</ref>


Public water fluoridation was first practiced in 1945, in the U.S. As of 2015, about 25 countries have supplemental water fluoridation to varying degrees, and 11 of them have more than 50% of their population drinking fluoridated water. A further 28 countries have water that is naturally fluoridated, though in many of them there are areas where fluoride is above the optimum level.<ref name=extent2012>{{cite book |chapter=The extent of water fluoridation |chapter-url=https://docs.wixstatic.com/ugd/014a47_0776b576cf1c49308666cef7caae934e.pdf |url=http://bfsweb.org/one-in-a-million |title=One in a Million: The facts about water fluoridation |edition=3rd |year=2012 |author1 = The British Fluoridation Society | author2 = The UK Public Health Association | author3 = The British Dental Association | author4 = The Faculty of Public Health |isbn=978-0-9547684-0-9 |pages=55–80 |publisher=British Fluoridation Society |location=Manchester }}</ref> As of 2012, about 435 million people worldwide received water fluoridated at the recommended level, of whom 57 million (13%) received naturally fluoridated water and 377 million (87%) received artificially fluoridated water.<ref name=extent2012 /><!-- Page 56 --> In 2014, three-quarters of the US population on the public water supply received fluoridated water, which represented two-thirds of the total US population.<ref name=US-CDC-WF-Stats-2014>{{cite web |url=https://www.cdc.gov/fluoridation/statistics/2014stats.htm |title=Community Water Fluoridation --- 2014 Water Fluoridation Statistics |work=cdc.gov |access-date=19 April 2016}}</ref>
==Health risks==
While the available data is sometimes contradictory, water fluoridation has been linked to:


== Medical consensus ==
*A weakening of ], leading to an increase in hip and wrist fracture.<ref name=Colquhoun1998/>
National and international health agencies and dental associations throughout the world have endorsed water fluoridation as safe and effective.<ref name=Pizzo>{{cite journal | vauthors = Pizzo G, Piscopo MR, Pizzo I, Giuliana G | title = Community water fluoridation and caries prevention: a critical review | journal = Clinical Oral Investigations | volume = 11 | issue = 3 | pages = 189–193 | date = September 2007 | pmid = 17333303 | doi = 10.1007/s00784-007-0111-6 | s2cid = 13189520 }}</ref><ref name=ADAorgs>{{cite web |url=http://www.ada.org/en/public-programs/advocating-for-the-public/fluoride-and-fluoridation/fluoridation-facts/fluoridation-facts-compendium|publisher=American Dental Association |title=National and International Organizations That Recognize the Public Health Benefits of Community Water Fluoridation for Preventing Dental Decay |access-date=2016-04-19 |archive-url=https://web.archive.org/web/20080607092909/http://ada.org/public/topics/fluoride/facts/compendium.asp |archive-date=2008-06-07 }}</ref> The views on the most effective method for community prevention of tooth decay are mixed. The Australian government states that water fluoridation is the most effective means of achieving fluoride exposure that is community-wide.<ref name="NHMRC" /> The World Health Organization states water fluoridation, when feasible and culturally acceptable, has substantial advantages, especially for subgroups at high risk,<ref name="Petersen-2004">{{cite journal | vauthors = Petersen PE, Lennon MA | title = Effective use of fluorides for the prevention of dental caries in the 21st century: the WHO approach | journal = Community Dentistry and Oral Epidemiology | volume = 32 | issue = 5 | pages = 319–321 | date = October 2004 | pmid = 15341615 | doi = 10.1111/j.1600-0528.2004.00175.x }}</ref> while the ] finds no advantage to water fluoridation compared with topical use.<ref name="EU2011" />


] supports water fluoridation as safe and effective.<ref name=extent2012 /> the European Academy of Paediatric Dentistry,<ref>{{cite journal | author = European Academy of Paediatric Dentistry | title = Guidelines on the use of fluoride in children: an EAPD policy document | journal = European Archives of Paediatric Dentistry | volume = 10 | issue = 3 | pages = 129–135 | date = September 2009 | pmid = 19772841 | doi = 10.1007/bf03262673 | s2cid = 3567956 }}</ref> and the national dental associations of Australia,<ref>{{cite web |url=http://www.ada.org.au/News-Media/Issues-at-a-Glance/Fluoride |access-date=2016-04-19 |title=Issues at a Glance Fluoride |author=] |archive-date=22 April 2017 |archive-url=https://web.archive.org/web/20170422041132/http://www.ada.org.au/News-Media/Issues-at-a-Glance/Fluoride |url-status=dead }}</ref> Canada,<ref>{{cite web |url=http://www.cda-adc.ca/_files/position_statements/fluoride.pdf|access-date=2016-04-19|date=March 2003| quote = update March 2012 |title=CDA position on use of fluorides in caries prevention |author=] }}</ref> and the U.S.<ref>{{cite web |url=http://ada.org/public/topics/fluoride/facts/fluoridation_facts.pdf|access-date=2008-12-22 |date=2005 |author=ADA Council on Access, Prevention and Interprofessional Relations |publisher=] |title=Fluoridation facts |archive-url=https://web.archive.org/web/20080723125738/http://ada.org/public/topics/fluoride/facts/fluoridation_facts.pdf |archive-date=2008-07-23 }}</ref> The American Dental Association calls water fluoridation "one of the safest and most beneficial, cost-effective public health measures for preventing, controlling, and in some cases reversing, tooth decay."<ref>{{cite web | publisher = American Dental Association | url = https://www.ada.org/en/press-room/press-kits/water-fluoridation-press-kit | title = Water Fluoridation Press Kit | date = 2005 | access-date = 26 June 2021 | archive-date = 26 June 2021 | archive-url = https://web.archive.org/web/20210626092740/https://www.ada.org/en/press-room/press-kits/water-fluoridation-press-kit | url-status = dead }}</ref>
*] damage, impaired ] function, and ] in children.<ref></ref>


In the English speaking nations—the United States, Canada, UK, Australia and New Zealand, all of which practice water fluoridation—many medical associations and authorities have published position statements and endorsed water fluoridation. The ],<ref>{{cite journal | vauthors = Murthy VH, ((c)) | doi = 10.1177/003335491513000402 | title = Surgeon General's Perspectives: Community Water Fluoridation – One of CDC's "10 Great Public Health Achievements of the 20th Century" | journal = Public Health Reports | date = July–August 2015 | volume = 130 | issue = 4 | pages = 296–298 | pmid = 26346894 | pmc = 4547574 }}</ref> the ],<ref>{{cite web |url=http://apha.org/news-and-media/news-releases/apha-news-releases/apha-reaffirms-its-support-for-community-water-fluoridation |access-date=2016-04-19 |date=2011 |title=APHA Reaffirms Its Support for Community Water Fluoridation |author=American Public Health Association }}</ref> the ],<ref>{{cite book|title=Royal Commission on the NHS Chapter 9|year= 1979|publisher=HMSO|isbn=978-0101761505|url=http://www.sochealth.co.uk/national-health-service/royal-commission-on-the-national-health-service-contents/royal-commission-on-the-nhs-chapter-9/|access-date=19 May 2015}}</ref> ],<ref>{{cite web|author=Australian Government Department of Health and Ageing|title=Fluoridation of drinking water|url=http://www.health.gov.au/internet/main/publishing.nsf/Content/dentalfluoridation|website=www.health.gov.au|access-date=22 April 2016|language=en}}</ref> ],<ref>{{cite web|title=Questions and answers &#124; Fluoride facts|url=http://www.fluoridefacts.govt.nz/questions-and-answers-0|website=www.fluoridefacts.govt.nz|access-date=22 April 2016}}</ref> and ] support fluoridation, citing a number of international scientific reviews that indicate "there is no link between any adverse health effects and exposure to fluoride in drinking water at levels that are below the maximum acceptable concentration of 1.5 mg/L."<ref>{{cite web|url=http://www.hc-sc.gc.ca/ewh-semt/water-eau/drink-potab/health-sante/faq_fluoride-fluorure-eng.php |title=Fluoride in Drinking Water |publisher=]|date=2017-01-23 }}</ref> The ] listed water fluoridation as one of the ten great public health achievements of the 20th century in the U.S.,<ref name="CDC-1999">{{cite journal |author=Division of Oral Health, National Center for Chronic Disease Prevention and Health Promotion, CDC |title=Achievements in public health, 1900–1999: Fluoridation of drinking water to prevent dental caries |journal = Morbidity and Mortality Weekly Report (MMWR) |volume=48 |issue=41 |pages=933–940 |date=1999 |url=http://cdc.gov/mmwr/preview/mmwrhtml/mm4841a1.htm }} Contains in: {{cite journal | vauthors = <!-- pacify citation bot --> | title = From the Centers for Disease Control and Prevention. Achievements in public health, 1900-1999: fluoridation of drinking water to prevent dental caries | journal = JAMA | volume = 283 | issue = 10 | pages = 1283–1286 | date = March 2000 | pmid = 10714718 | doi = 10.1001/jama.283.10.1283 | doi-access = free }}</ref> along with ], ], recognition of the ], and other achievements.<ref name="CDC-1999" />
*]. The evidence is mixed and tentative,<ref name=CDCosteosarcoma></ref> although a 2006 study found a relationship with male children.<ref>Bassin et al. (2006). </ref>


In ], the Israeli Association of Public Health Physicians, the Israel Pediatric Association, and the Israel Dental Association, support fluoridation.<ref>{{cite web|title=Restoration of Fluoridation to Drinking Water, Ministry of Health|url=http://www.health.gov.il/English/Topics/Dental_Health/information/Pages/flouride-2015.aspx|website=www.health.gov.il|access-date=23 April 2016}}</ref> The ], looking at global public health, identifies fluoride as one of a few chemicals for which the contribution from drinking-water to overall intake is an important factor in preventing disease. This is because there is clear evidence that optimal concentrations of fluoride provide protection against cavities, both in children and in adults.<ref>{{cite web |url=https://www.who.int/water_sanitation_health/oralhealth/en/index2.html |title=Water fluoridation |work=World Water Day 2001: Oral health |publisher=] |url-status=dead |archive-url=https://web.archive.org/web/20110514030918/http://www.who.int/water_sanitation_health/oralhealth/en/index2.html |archive-date=14 May 2011|quote=There are few chemicals for which the contribution from drinking-water to overall intake is an important factor in preventing disease. One example is the effect of fluoride in drinking-water in protecting against dental caries.}}</ref><ref name="WHO2011">{{Cite book|url=http://apps.who.int/iris/bitstream/10665/44584/1/9789241548151_eng.pdf|title=Guidelines for Drinking-water Quality|edition=4th|publisher=]|year=2011|isbn=9789241548151|pages=168, 175, 372, 370–373}}</ref>{{sfn|Fawell et al.|2006|p=32|ps=.{{sp}}"Concentrations in drinking-water of about 1 mg l–1 are associated with a lower incidence of dental caries, particularly in children, whereas excess intake of fluoride can result in dental fluorosis. In severe cases this can result in erosion of enamel. The margin between the beneficial effects of fluoride and the occurrence of dental fluorosis is small and public health programmes seek to retain a suitable balance between the two."}}
*A 2000 ] study found that in areas with high intake of ]s, children had increased ] blood levels.<ref name=MastersWebsite></ref><ref name=Masters2000>{{citation | author = Masters, R. D.; Coplan, M. J.; Hone, B. T.; Dykes, J. E. | year = 2000 | journal = Neurotoxicology | volume = 21 | issue = 6 | pages = 1091–100 | url = http://www.ncbi.nlm.nih.gov/pubmed/11233755}} </ref> A 2007 update on this study confirmed the result and noted that ]s, fluosilicic acid and sodium fluosilicate are used to fluoridate over 90% of US fluoridated municipal water supplies.<ref name=Masters2007>{{citation | author = Coplan, M. J.; Patch, S. C.; Masters, R. D.; Bachman, M. S. | year = 2007 | title = Confirmation of and explanations for elevated blood lead and other disorders in children exposed to water disinfection and fluoridation chemicals | journal = Neurotoxicology | volume = 28 | issue = 5 | pages = 1032–1042 | doi = 10.1016/j.neuro.2007.02.012}}</ref>


=== Minority scientific view ===
*] damage and interference with ] repair.{{Fact|date=July 2008}}
The scientists or doctors who oppose water fluoridation argue that it has no or little cariostatic benefits, may cause serious health problems, is not effective enough to justify the costs, and is pharmacologically obsolete.<ref name=Thiessen /><ref name=Hileman /><ref name=Kaminsky />


== Evidence ==
*A lowering of IQ.<ref>National Research Council. Fluoride in Drinking Water: A Scientific Review of EPA's Standards (2006). Page accessed 23 February, 2007.</ref>
Proponents and opponents have been both criticized for overstating the benefits or risks, and understating the other, respectively.<ref name="ChengChalmers2007" /><ref name=yorkcrd /> Systematic reviews have cited the lack of high-quality research for the benefits and risks of water fluoridation and questions that are still unsettled.<ref name=Scher2011 /><ref name=yorkcrd /><ref name=Ih2015 /> A 2007 ] report concluded that good evidence for or against water fluoridation is lacking.<ref name=nuffield /> Researchers who oppose the practice state this as well.<ref name="Book Reviews 2011" /> According to a 2013 ] report on fluoride in drinking water, these gaps in the fluoridation scientific literature fuel the controversy.<ref name=Tiemann2013 /> John Doull, chairman of the 2006 ] committee report on fluoride in drinking water, has stated a similar conclusion regarding the source of the controversy: "In the scientific community, people tend to think this is settled. I mean, when the U.S. surgeon general comes out and says this is one of the 10 greatest achievements of the 20th century, that's a hard hurdle to get over. But when we looked at the studies that have been done, we found that many of these questions are unsettled and we have much less information than we should, considering how long this has been going on. I think that's why fluoridation is still being challenged so many years after it began. In the face of ignorance, controversy is rampant."<ref>{{cite journal| vauthors = Barnett-Rose R |title=Compulsory Water Fluoridation: Justifiable Public Health Benefit or Human Experimental Research Without Informed Consent?|journal=William & Mary Environmental Law and Policy Review|date=December 2014|volume= 39|issue= 1|page=225|url=http://scholarship.law.wm.edu/wmelpr/vol39/iss1/7/|access-date=21 April 2016}}</ref><ref name=Fagin>{{cite journal | vauthors = Fagin D | title = Second thoughts about fluoride | journal = Scientific American | volume = 298 | issue = 1 | pages = 74–81 | date = January 2008 | pmid = 18225698 | doi = 10.1038/scientificamerican0108-74 | doi-broken-date = 1 November 2024 | bibcode = 2008SciAm.298a..74F }}</ref>


=== Safety ===
* Inhibition of ] production and promotion of precocious ] in animal studies.<ref></ref> Fluoride may have an analogous inhibitory effect on human melatonin production, as fluoride accumulates readily in the human ], the brain organ responsible for melatonin ].<ref></ref>
{{Main|Water fluoridation#Safety}}
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] can be present naturally in water at concentrations well above recommended levels, which can have ], including severe dental fluorosis, ], and weakened bones.{{sfn|Fawell et al.|2006|pp=29–36}} In 1984 the World Health Organization recommended a guideline maximum fluoride value of 1.5&nbsp;mg/L as a level at which fluorosis should be minimal, reaffirming it in 2006.{{sfn|Fawell et al.|2006|pp=37–39}}


Fluoridation has little effect on risk of ] (broken bones); it may result in slightly lower fracture risk than either excessively high levels of fluoridation or no fluoridation.<ref name="NHMRC">{{cite book |url=http://nhmrc.gov.au/_files_nhmrc/file/publications/synopses/Eh41_Flouridation_PART_A.pdf|access-date=2009-10-13 |year=2007 |title=A systematic review of the efficacy and safety of fluoridation |author=National Health and Medical Research Council (Australia) |isbn=978-1864964158 | archive-url = https://web.archive.org/web/20091014191758/http://www.nhmrc.gov.au/_files_nhmrc/file/publications/synopses/Eh41_Flouridation_PART_A.pdf | archive-date=14 October 2009 }} Summary: {{cite journal | vauthors = Yeung CA | title = A systematic review of the efficacy and safety of fluoridation | journal = Evidence-Based Dentistry | volume = 9 | issue = 2 | pages = 39–43 | date = 2008 | pmid = 18584000 | doi = 10.1038/sj.ebd.6400578 | s2cid = 205675585 | url = http://nhmrc.gov.au/_files_nhmrc/file/media/media/rel07/Fluoride_Flyer.pdf | doi-access = free }}</ref> There is no clear association between fluoridation and ] or deaths due to cancer, both for cancer in general and specifically for ] and ].<ref name="NHMRC" /><ref name="YorkReview2000">{{cite web | vauthors = McDonagh M, Whiting P, Bradley M, Cooper J, Sutton A, Chestnutt I, Misso K, Wilson P, Treasure E, Kleijnen J |title=A systematic review of public water fluoridation |url=http://www.york.ac.uk/inst/crd/CRD_Reports/crdreport18.pdf|date=2000 }} Report website: {{cite web |title=Fluoridation of drinking water: a systematic review of its efficacy and safety |publisher=NHS Centre for Reviews and Dissemination |date=2000 |url=http://www.york.ac.uk/inst/crd/fluorid.htm |access-date=2009-05-26 }} Authors' summary: {{cite journal | vauthors = McDonagh MS, Whiting PF, Wilson PM, Sutton AJ, Chestnutt I, Cooper J, Misso K, Bradley M, Treasure E, Kleijnen J | display-authors = 6 | title = Systematic review of water fluoridation | journal = BMJ | volume = 321 | issue = 7265 | pages = 855–859 | date = October 2000 | pmid = 11021861 | pmc = 27492 | doi = 10.1136/bmj.321.7265.855 }} Authors' commentary: {{cite journal | vauthors = Treasure ET, Chestnutt IG, Whiting P, McDonagh M, Wilson P, Kleijnen J | title = The York review – a systematic review of public water fluoridation: a commentary | journal = British Dental Journal | volume = 192 | issue = 9 | pages = 495–497 | date = May 2002 | pmid = 12047121 | doi = 10.1038/sj.bdj.4801410a | doi-access = free }}</ref>
*A weakened ], leaving people vulnerable to the development of ] and ].<ref>"Effects of Fluoride on Immune System Function" by Sheila L.M. Gibson, M.D., Complimentary Medical Research, October 1992, pp. 111-113.</ref><ref>, website, accessed 19 February, 2006.</ref>


In rare cases improper implementation of water fluoridation can result in overfluoridation that causes outbreaks of acute ], with symptoms that include ], ], and ]. Three such outbreaks were reported in the U.S. between 1991 and 1998, caused by fluoride concentrations as high as 220&nbsp;mg/L; in the 1992 Alaska outbreak, 262 people became ill and one person died.<ref>{{cite journal | vauthors = Balbus JM, Lang ME | title = Is the water safe for my baby? | journal = Pediatric Clinics of North America | volume = 48 | issue = 5 | pages = 1129–1152, viii | date = October 2001 | pmid = 11579665 | doi = 10.1016/S0031-3955(05)70365-5 }}</ref> In 2010, approximately 60 gallons of fluoride were released into the water supply in ], in 90 minutes—an amount that was intended to be released in a 24-hour period.<ref>{{cite news |publisher= Fox 8 |title= Asheboro notifies residents of over-fluoridation of water |date= 2010-06-29 |url= http://www.myfox8.com/news/wghp-asheboro-fluoride-release-100629,0,2164002.story |url-status= dead |archive-url= https://web.archive.org/web/20100704054308/http://www.myfox8.com/news/wghp-asheboro-fluoride-release-100629,0,2164002.story |archive-date= 4 July 2010}}</ref>
*Damage to the male ] in various ].<ref>, website, accessed 18 February, 2006.</ref>


Like other common water additives such as ], hydrofluosilicic acid and sodium silicofluoride decrease pH and cause a small increase of ], but this problem is easily addressed by increasing the pH.<ref name=Pollick /> Although it has been hypothesized that hydrofluosilicic acid and sodium silicofluoride might increase human ] uptake from water, a 2006 statistical analysis did not support concerns that these chemicals cause higher blood lead concentrations in children.<ref>{{cite journal | vauthors = Macek MD, Matte TD, Sinks T, Malvitz DM | title = Blood lead concentrations in children and method of water fluoridation in the United States, 1988-1994 | journal = Environmental Health Perspectives | volume = 114 | issue = 1 | pages = 130–134 | date = January 2006 | pmid = 16393670 | pmc = 1332668 | doi = 10.1289/ehp.8319 | bibcode = 2006EnvHP.114..130M }}</ref> Trace levels of ] and lead may be present in fluoride compounds added to water; however, ]s are below measurement limits.<ref name=Pollick />
*A disruption in ] function, especially in the ].<ref name=SciAm/>


The effect of water fluoridation on the natural environment has been investigated, and no adverse effects have been established. Issues studied have included fluoride concentrations in groundwater and downstream rivers; lawns, gardens, and plants; consumption of plants grown in fluoridated water; air emissions; and equipment noise.<ref name=Pollick>{{cite journal | vauthors = Pollick HF | title = Water fluoridation and the environment: current perspective in the United States | journal = International Journal of Occupational and Environmental Health | volume = 10 | issue = 3 | pages = 343–350 | date = 2004 | pmid = 15473093 | doi = 10.1179/oeh.2004.10.3.343 | s2cid = 8577186 }}</ref>
==Fluorosis==
{{off-topic}}
===Dental Fluorosis===
{{details more|Dental fluorosis}}
]
Two academic dental officials {{weasel-inline}} formerly in favor of fluoridation, Dr. John Colquhoun<ref name=Colquhoun1998/> and Dr. Hardy Limeback,<ref name=Limeback2000/> cite dental fluorosis as a major reason in their opposition to fluoridation. Dental fluorosis occurs because of the excessive intake of ] either through fluoride in the water supply, naturally occurring or added to it; or through other sources. The damage in ] occurs between the ages of 6 months to 5 years, from the overexposure to fluoride. In its severe form it is characterized by black and brown stains, as well as cracking and pitting of the teeth. <ref></ref><ref></ref><ref>http://www.npr.org/templates/story/story.php?storyId=5295412</ref><ref>, from the website, page accessed 18 March, 2006.</ref>


=== Efficacy ===
The ] cautions that fluoride levels above 1.5 milligrams per liter leaves the risk for fluorosis.<ref>, from the website, page accessed 18 March, 2006.</ref> To protect against this health organizations in some high fluoride areas endorse providing alternative water sources, or removing fluoride from the water.<ref>, website, page 4, page accessed March 4, 2006.</ref> 0.07 &ndash; 1.2 milligrams per liter of fluoride is considered to be the optimal level. A CDC evaluation concluded that prevalence of some level of fluorosis among children and adolescents in the United States had increased by from 22.8% in 1986 &ndash; 1987 to 32% in 1999 &ndash; 2002.<ref>CDC. </ref>
{{Main|Water fluoridation#Effectiveness}}
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Reviews have shown that water fluoridation reduces cavities in children.<ref name=Ih2015 /><ref name=EU2011>{{cite web|title=What role does fluoride play in preventing tooth decay?|url=http://ec.europa.eu/health/scientific_committees/opinions_layman/fluoridation/en/l-3/5.htm#0|date=2011|access-date=18 April 2016}}</ref><ref name=Parnell>{{cite journal | vauthors = Parnell C, Whelton H, O'Mullane D | title = Water fluoridation | journal = European Archives of Paediatric Dentistry | volume = 10 | issue = 3 | pages = 141–148 | date = September 2009 | pmid = 19772843 | doi = 10.1007/bf03262675 | s2cid = 5442458 }}</ref> A conclusion for the efficacy in adults is less clear with some reviews finding benefit and others not.<ref name=Ih2015 /><ref name=Parnell /> Studies in the U.S. in the 1950s and 1960s showed that water fluoridation reduced childhood cavities by fifty to sixty percent, while studies in 1989 and 1990 showed lower reductions (40% and 18% respectively), likely due to increasing use of fluoride from other sources, notably toothpaste, and the "halo effect" of food and drink that is made in fluoridated areas and consumed in unfluoridated ones.<ref name="FRWG">{{cite journal|author=Centers for Disease Control and Prevention|date=August 2001|title=Recommendations for using fluoride to prevent and control dental caries in the United States. Centers for Disease Control and Prevention|url=http://cdc.gov/mmwr/preview/mmwrhtml/rr5014a1.htm|journal=MMWR. Recommendations and Reports|volume=50|issue=RR-14|pages=1–42|pmid=11521913<!-- |url=http://cdc.gov/fluoridation/guidelines/tooth_decay.htm -->}}</ref>


A 2000 UK ] (York) found that water fluoridation was ] with a decreased proportion of children with cavities of 15% and with a decrease in decayed, ], and ] ] (average decreases was 2.25&nbsp;teeth). The review found that the evidence was of moderate quality: few studies attempted to reduce ], control for ]s, report variance measures, or use appropriate analysis. Although no major differences between natural and artificial fluoridation were apparent, the evidence was inadequate for a conclusion about any differences.<ref name=YorkReview2000 /> A 2002 systematic review found strong evidence that water fluoridation is effective at reducing overall tooth decay in communities.<ref name=Truman>{{cite journal | vauthors = Truman BI, Gooch BF, Sulemana I, Gift HC, Horowitz AM, Evans CA, Griffin SO, Carande-Kulis VG | display-authors = 6 | title = Reviews of evidence on interventions to prevent dental caries, oral and pharyngeal cancers, and sports-related craniofacial injuries | journal = American Journal of Preventive Medicine | volume = 23 | issue = 1 Suppl | pages = 21–54 | date = July 2002 | pmid = 12091093 | doi = 10.1016/S0749-3797(02)00449-X | url = https://zenodo.org/record/1260085 }}</ref> A 2015 Cochrane review also found benefit in children.<ref name=Ih2015 />
===Skeletal Fluorosis===
{{details more|Skeletal fluorosis}}
] is a bone disease exclusively caused by excessive consumption of ]. In advanced cases, skeletal fluorosis causes pain and damage to bones and joints. Advanced cases usually involve about ten times the normal amount of fluoride. <ref>, from the website, page accessed 18 March, 2006.</ref> Development of skeletal fluorosis is directly related to the level and exposure of fluoride exposure, for example, water fluoridated at five parts per million (ppm) for ten years or more is needed to produce signs of ].<ref name="adafluoridationfacts"> (in pdf format), from the website, page accessed 18 March, 2006.</ref>


Fluoride may also prevent cavities in adults of all ages. A 2007 ] by CDC researchers found that water fluoridation prevented an estimated 27% of cavities in adults, about the same fraction as prevented by exposure to any delivery method of fluoride (29% average).<ref name=Griffin>{{cite journal | vauthors = Griffin SO, Regnier E, Griffin PM, Huntley V | title = Effectiveness of fluoride in preventing caries in adults | journal = Journal of Dental Research | volume = 86 | issue = 5 | pages = 410–415 | date = May 2007 | pmid = 17452559 | doi = 10.1177/154405910708600504 | s2cid = 58958881 | hdl = 10945/60693 | hdl-access = free }} Summary: {{cite journal | vauthors = Yeung CA | title = Fluoride prevents caries among adults of all ages | journal = Evidence-Based Dentistry | volume = 8 | issue = 3 | pages = 72–73 | year = 2007 | pmid = 17891121 | doi = 10.1038/sj.ebd.6400506 | s2cid = 24509775 | doi-access = free }}</ref> A 2011 European Commission review concluded that water fluoridation has no known advantage over topical prevention (e.g. through fluoride toothpaste). It also found that water fluoridation has limited benefit for adults, because the continued administration of systemic fluoride after the permanent teeth have erupted has questionable efficacy in preventing tooth decay.<ref name=EU2011 /> A 2015 Cochrane review found no conclusive research in adults.<ref name=Ih2015 />
==Concentration of fluoride==
{{Off-topic}}
In 1986 the ] (EPA) established a ] (MCL) for fluoride at a concentration of 4 milligrams per litre (mg/L). In 2006 the ] (NRC) concluded that the current MCL of 4 mg/L should be lowered. The EPA has yet to act on the NRC's recommendation.
<ref></ref><ref></ref><ref>http://www.fluoridealert.org/health/epa/dental-fluorosis.html</ref>


Most countries in Europe have experienced substantial declines in cavities without the use of water fluoridation.<ref name=Pizzo /> For example, in Finland and Germany, tooth decay rates remained stable or continued to decline after water fluoridation stopped. Fluoridation may be useful in the U.S. because unlike most European countries, the U.S. does not have school-based dental care, many children do not visit a dentist regularly, and for many U.S. children water fluoridation is the prime source of exposure to fluoride.<ref name=Burt>{{cite book | vauthors = Burt BA, Tomar SL |chapter=Changing the face of America: water fluoridation and oral health |pages=307–322 |title=Silent Victories: The History and Practice of Public Health in Twentieth-century America | veditors = Ward JW, Warren C |publisher=Oxford University Press |year=2007 |isbn=978-0195150698 }}</ref> The effectiveness of water fluoridation can vary according to circumstances such as whether preventive dental care is free to all children.<ref>{{cite journal | vauthors = Hausen HW | title = Fluoridation, fractures, and teeth | journal = BMJ | volume = 321 | issue = 7265 | pages = 844–845 | date = October 2000 | pmid = 11021844 | pmc = 1118662 | doi = 10.1136/bmj.321.7265.844 }}</ref>
==Critical evaluations and studies==
The largest study of water fluoridation's efficacy, conducted by the National Institute of Dental Research, showed no statistically significant difference in ] rates among children in fluoridated and non-fluoridated communities.<ref></ref>
A review of the evidence from the ], published in 2000, examined 30 studies.<ref> York Review, Executive Summary </ref> The researchers concluded that the quality of evidence in most studies was poor, also expressing concern over the "continuing misinterpretations of the ]." <ref>, from the ]. Published ] ]; accessed Feb 5, 2008.</ref> Many medical ] argue that the effects of fluoridation on teeth are ] (brushed on) rather than ] (swallowed). <ref></ref><ref>Cheng KK, et al. (2007). Adding fluoride to water supplies. British Medical Journal 335(7622):699-702.</ref><ref>Pizzo G, Piscopo MR, Pizzo I, Giuliana G. (2007). Community water fluoridation and caries prevention: a critical review. Clinical Oral Investigations 11(3):189-93.</ref><ref>National Research Council. (2006). Fluoride in Drinking Water: A Scientific Review of EPA's Standards. National Academies Press, Washington D.C. p 13.</ref><ref>European Commission. (2005). The Safety of Fluorine Compounds in Oral Hygiene Products for Children Under the Age of 6 Years. European Commission, Health & Consumer Protection Directorate-General, Scientific Committee on Consumer Products, September 20.</ref><ref>Hellwig E, Lennon AM. (2004). Systemic versus topical fluoride. Caries Research 38: 258-62.</ref><ref>Fejerskov O. (2004). Changing paradigms in concepts on dental caries: consequences for oral health care. Caries Research 38: 182-91.</ref><ref>Warren JJ, Levy SM. (2003). Current and future role of fluoride in nutrition. Dental Clinics of North America 47: 225-43.</ref><ref>Brothwell D, Limeback H. (2003). Breastfeeding is protective against dental fluorosis in a nonfluoridated rural area of Ontario, Canada. Journal of Human Lactation 19: 386-90.</ref><ref>Zimmer S, et al. (2003). Recommendations for the Use of Fluoride in Caries Prevention. Oral Health & Preventive Dentistry 1: 45-51.</ref><ref>Aoba T, Fejerskov O. (2002). Critical Review of Oral Biology and Medicine 13: 155-70.</ref><ref>Centers for Disease Control and Prevention. (2001). Recommendations for Using Fluoride to Prevent and Control Dental Caries in the United States. Morbidity and Mortality Weekly Report 50(RR14): 1-42.</ref><ref>Featherstone, JDB. (2000). The Science and Practice of Caries Prevention. Journal of the American Dental Association 131: 887-899.</ref><ref>Formon, SJ; Ekstrand, J; Ziegler, E. (2000). Fluoride Intake and Prevalence of Dental Fluorosis: Trends in Fluoride Intake with Special Attention to Infants. Journal of Public Health Dentistry 60: 131-9.</ref><ref>Adair SM. (1999). Overview of the history and current status of fluoride supplementation schedules. Journal of Public Health Dentistry 1999 59:252-8.</ref><ref>Burt BA. (1999). The case for eliminating the use of dietary fluoride supplements for young children. Journal of Public Health Dentistry 59: 260-274.</ref><ref>Featherstone JDB. (1999) Prevention and Reversal of Dental Caries: Role of Low Level Fluoride. Community Dentistry & Oral Epidemiology 27: 31-40.</ref><ref>Centers for Disease Control and Prevention. (1999). Achievements in Public Health, 1900-1999: Fluoridation of Drinking Water to Prevent Dental Caries. Morbidity and Mortality Weekly Report 48: 933-940.</ref><ref>Limeback, H. (1999). A re-examination of the pre-eruptive and post-eruptive mechanism of the anti-caries effects of fluoride: is there any caries benefit from swallowing fluoride? Community Dentistry and Oral Epidemiology 27: 62-71.</ref><ref>Locker D. (1999). Benefits and Risks of Water Fluoridation. An Update of the 1996 Federal-Provincial Sub-committee Report. Prepared for Ontario Ministry of Health and Long Term Care.</ref><ref>Diesendorf, M. et al. (1997). New Evidence on Fluoridation. Australian and New Zealand Journal of Public Health 21 : 187-190.</ref><ref>Ekstrand J, et al. (1994). Fluoride pharmacokinetics in infancy. Pediatric Research 35:157–163.</ref><ref>Zero DT, et al. (1992). Fluoride concentrations in plaque, whole saliva, and ductal saliva after application of home-use topical fluorides. Journal of Dental Research 71:1768-1775.</ref><ref>Leverett DH. (1991). Appropriate uses of systemic fluoride: considerations for the '90s. Journal of Public Health Dentistry 51: 42-7.</ref><ref>Wefel JS. (1990). Effects of fluoride on caries development and progression using intra-oral models. Journal of Dental Research 69(Spec No):626-33;</ref><ref>Carlos JP. (1983) Comments on Fluoride. Journal of Pedodontics Winter. 135-136.</ref><ref>Fejerskov O, Thylstrup A, Larsen MJ. (1981). Rational Use of Fluorides in Caries Prevention: A Concept based on Possible Cariostatic Mechanisms. Acta Odontologica Scandinavica 39: 241-249.</ref>


== Ethics ==
In 2005, eleven environmental protection agency ] employee unions, representing over 7000 environmental and public health professionals of the Civil Service, called for a halt on drinking water fluoridation programs across the USA and asked EPA management to recognize fluoride as posing a serious risk of causing ] in people. The unions acted on an apparent cover-up of evidence from ] School of Dental Medicine linking fluoridation with an elevated risk of ] in boys, a rare but fatal bone cancer. <ref>The Washington Post: "Professor at Harvard Is Being Investigated" </ref> <ref>http://nteu280.org/Issues/Fluoride/fluoridesummary.htm</ref>
Water fluoridation pits the common good against individual rights.{{Citation needed|reason=This statement is not self-evident and requires justification|date=July 2018}} Some say the common good overrides individual rights, and equate it to ] and ].<ref name=ethics /><ref name=Cross2003 /> Others say that individual rights override the common good, and say that individuals have no choice in the water that they drink, unless they drink more expensive bottled water,<ref name=Coggon /> and some argue unequivocally that it does not stand up to scrutiny relative to the Nuremberg Code and other codes of medical ethics.<ref name=Cross2003 />


Those who emphasize the public good emphasize the ] that appropriate levels of water fluoridation are safe and effective to prevent cavities and see it as a ] intervention, replicating the benefits of naturally fluoridated water, which can free people from the misery and expense of tooth decay and ], with the greatest benefit accruing to those least able to help themselves. This perspective suggests it would be unethical to withhold such treatment.<ref>{{cite book |chapter=The ethics of water fluoridation |chapter-url=https://bfsweb.org/download/1344/one-in-a-million/1Vng0bH7Tc1j0u_L_jJknMBC6OLwiY2TC/The%20ethics%20of%20water%20fluoridation%20(3rd%20edition,%202012) |url=http://bfsweb.org/one-in-a-million |title=One in a Million: The facts about water fluoridation |edition=3rd |year=2012 |author1 = The British Fluoridation Society | author2 = The UK Public Health Association | author3 = The British Dental Association | author4 = The Faculty of Public Health |isbn=978-0954768409 |pages=88–92 |publisher=British Fluoridation Society |location=Manchester }}</ref> In her book ''50 Health Scares That Fizzled'', ] writes that, "For lower-income people with no insurance, fluoridated water (like enriched flour and fortified milk) looks more like a free preventative health measure that a few elitists are trying to take away."<ref>{{cite book | vauthors = Callahan JR |title=50 health scares that fizzled |date=2011 |publisher=Greenwood |location=Santa Barbara, Calif. |isbn=978-0313385384}}</ref>
In addition, over 1,730 health industry professionals, including doctors, dentists, scientists and researchers from a variety of disciplines are calling for an end to water fluoridation in an online petition to Congress. <ref name="FlorideAlertAugust2007">http://www.fluoridealert.org/statement.august.2007.html</ref>


Those who emphasize individual or local choice, may view fluoridation as a violation of ] or legal rules that prohibit medical treatment without medical supervision or informed consent or that prohibit administration of unlicensed medical substances,<ref name=Pizzo /><ref name=LockerCohen2001>{{cite journal | vauthors = Cohen H, Locker D | title = The science and ethics of water fluoridation | journal = Journal | volume = 67 | issue = 10 | pages = 578–580 | date = November 2001 | pmid = 11737979 | url = http://www.cda-adc.ca/jcda/vol-67/issue-10/578.html }}</ref> view it as "mass medication",<ref name=GreenUK2003>{{cite press release | author1-last = Charlton | author1-first = Hugo | author2-last = Fitz-Gibbon | author2-first = Spencer | publisher = UK Green Party | date = 2003-07-08 | url = http://www.greenparty.org.uk/files/reports/2003/F%20illegality.htm | title = Water fluoridation contravenes UK law, EU directives and the European Convention on Human Rights and Biomedicine | access-date = 2008-08-03 | archive-url = https://web.archive.org/web/20040317205936/http://www.greenparty.org.uk/files/reports/2003/F%20illegality.htm | archive-date = 2004-03-17 | url-status = dead }}</ref> or may even characterize it as a violation of the ] and the Council of Europe's Biomedical Convention of 1999.<ref name=Cross2003 /><ref name=Tiemann2013>{{cite web| vauthors = Tiemann M |title=Fluoride in Drinking Water: A Review of Fluoridation and Regulation Issues|url=https://www.fas.org/sgp/crs/misc/RL33280.pdf|access-date=19 April 2016|date=5 April 2013|pages= 1–4}}</ref><ref name="ChengChalmers2007" /> Another journal article suggested applying the ] to this controversy, which calls for ] to reflect a conservative approach to minimize risk in the setting where harm is possible (but not necessarily confirmed) and where the science is not settled.<ref name="Tickner">{{cite journal | vauthors = Tickner J, Coffin M | title = What does the precautionary principle mean for evidence-based dentistry? | journal = The Journal of Evidence-Based Dental Practice | volume = 6 | issue = 1 | pages = 6–15 | date = March 2006 | pmid = 17138389 | doi = 10.1016/j.jebdp.2005.12.006 }}</ref> Others have opposed it on the grounds of potential financial conflicts of interest driven by the chemical industry.<ref name=GreenUK2015>{{Citation| title= Health| work = Record of Policy Statements| publisher = ]| year= 2014| url= http://policy.greenparty.org.uk/he.html| access-date = 2014-11-22 }}</ref>
Their petition highlights eight recent events that they say mandates a moratorium on water fluoridation, including a 500-page review of fluoride’s toxicology that was published in 2006 by a distinguished panel appointed by the ] of the ]. <ref>http://www.nap.edu/catalog.php?record_id=11571</ref> While the NRC report did not specifically examine artificially fluoridated water, it concluded that the ] ] safe drinking water standard of 4 parts per million (ppm) for fluoride is unsafe and should be lowered. Despite over 60 years of water fluoridation in the U.S, there are no double-blind studies which prove fluoride's effectiveness in tooth decay. The panel reviewed a large body of literature in which fluoride has a statistically significant association with a wide range of adverse effects.<ref></ref>


A 2007 ] report reached a conclusion mainly on three points, stating that :
The petition signers express concern for ] groups like "small ], above average water drinkers, ], and people with poor ] function," considering that many members of these sub-populations may already be ] on fluoride.<ref name="FlorideAlertAugust2007" />
* The balance of benefit to risk ratio – is unclear due to the lack of good evidence for or against water fluoridation.
* Alternatives to the practice exist – topical fluoride therapy (toothbrushing, etc.)
* The role of consent – it gets priority when there are potential harms.
The report therefore concluded that local and regional democratic procedures are the most appropriate way to decide whether to fluoridate.<ref name=nuffield>{{cite journal | vauthors = Calman K | title = Beyond the 'nanny state': stewardship and public health | journal = Public Health | volume = 123 | issue = 1 | pages = e6–e10 | date = January 2009 | pmid = 19135693 | doi = 10.1016/j.puhe.2008.10.025 | pmc = 7118790 | url = http://www.nuffieldbioethics.org/fileLibrary/pdf/One_page_summary_public_health.pdf | publisher = Nuffield Council on Bioethics | access-date = 20 April 2016 | archive-date = 27 March 2009 | archive-url = https://web.archive.org/web/20090327113131/http://www.nuffieldbioethics.org/fileLibrary/pdf/One_page_summary_public_health.pdf | url-status = dead }}</ref><ref name=Nuffieldfull>{{cite book|title=Public health : ethical issues (Chapter 7 – Fluoridation of water)|date=2007|publisher=]|location=London|isbn=978-1-904384-17-5|url=http://nuffieldbioethics.org/report/public-health-2/water-fluoridation/|access-date=25 April 2016|archive-date=24 June 2017|archive-url=https://web.archive.org/web/20170624000426/http://nuffieldbioethics.org/report/public-health-2/water-fluoridation|url-status=dead}}</ref><ref>{{cite web|title=Community Water Fluoridation in the United States|url=https://www.apha.org/policies-and-advocacy/public-health-policy-statements/policy-database/2014/07/24/13/36/community-water-fluoridation-in-the-united-states|website=www.apha.org|publisher=American Public Health Association|access-date=30 April 2016}}</ref><ref>{{cite journal | vauthors = Jiang Y, Foster Page LA, McMillan J, Lyons K, Broadbent J, Morgaine KC | title = Is New Zealand water fluoridation justified? | journal = The New Zealand Medical Journal | volume = 127 | issue = 1406 | pages = 80–86 | date = November 2014 | pmid = 25447252 }}</ref>


== Opposition groups and campaigns ==
Another concern that the petition signers share is, "The admission by federal agencies, in response to questions from a Congressional subcommittee in 1999-2000, that the industrial grade waste products used to fluoridate over 90% of America's drinking water supplies (fluorosilicate compounds) have never been subjected to ] testing nor received FDA approval for human ingestion."<ref name="FlorideAlertAugust2007" />
The controversy is propelled by a significant public opposition supported by a minority of professionals,<ref name="ReferenceA" /> including researchers, dental and medical professionals, alternative medical practitioners such as ], health food enthusiasts, a few religious groups (mostly ] in the U.S.), and occasionally consumer groups and environmentalists.<ref name=Reilly /> Organized political opposition has come from ],<ref name=Dehnbase /> the ],<ref name = "Freeze_2009" /> the ],<ref name=":0" /> and from groups like the Green parties in the UK and New Zealand.<ref name=Greenwars /><ref name=GreenUK2015 /><ref name = "Freeze_2009" />{{rp|219–254}}


Opposition campaigns involve newspaper articles, talk radio, and public forums. Media reporters are often poorly equipped to explain the scientific issues, and are motivated to present controversy regardless of the underlying scientific merits. Websites, which are increasingly used by the public for health information, contain a wide range of material about fluoridation ranging from factual to fraudulent, with a disproportionate percentage opposed to fluoridation. Antifluoridationist literature links fluoride exposure to a wide variety of effects, including ], ], ], ], ], and low ], along with diseases of the ], ], ], and ], though there is no scientific evidence linking fluoridation to these adverse health effects.<ref name=Armfield>{{cite journal | vauthors = Armfield JM | title = When public action undermines public health: a critical examination of antifluoridationist literature | journal = Australia and New Zealand Health Policy | volume = 4 | pages = 25 | date = December 2007 | pmid = 18067684 | pmc = 2222595 | doi = 10.1186/1743-8462-4-25 | doi-access = free }}</ref><ref>{{cite web |title=Fact Sheet: Community Water Fluoridation |url=https://www.cdc.gov/fluoridation/resources/community-water-fluoridation-fact-sheet.html |website=Centers for Disease Control and Prevention |date=2021}}</ref>
A separate petition that calls on the United States congress to halt the practice of fluoridation has received over 12,300 signatures. <ref>http://www.fluoridealert.org/</ref>


== Public opinion ==
In the book, "The Fluoride Deception," author Christopher Bryson claims that "industrial interests, concerned about ] from fluoride ] and health effects on workers, played a significant role in the early ] of fluoridation."<ref></ref>
Many people do not know that fluoridation is meant to prevent tooth decay, or that natural or bottled water can contain fluoride. As fluoridation does not appear to be an important issue for the general public in the U.S., the debate may reflect an argument between two relatively small ] for and against fluoridation.<ref name=Griffin-opinions /> A survey of Australians in 2009 found that 70% supported and 15% opposed fluoridation. Those opposed were much more likely to score higher on ]s such as "unclear benefits".<ref>{{cite journal | vauthors = Armfield JM, Akers HF | title = Risk perception and water fluoridation support and opposition in Australia | journal = Journal of Public Health Dentistry | volume = 70 | issue = 1 | pages = 58–66 | year = 2009 | pmid = 19694932 | doi = 10.1111/j.1752-7325.2009.00144.x | doi-access = free }}</ref>


A study of focus groups from 16 European countries in 2003 found that fluoridation was opposed by a majority of focus group members in most of the countries, including France, Germany, and the UK.<ref name="Griffin-opinions">{{cite journal | vauthors = Griffin M, Shickle D, Moran N | title = European citizens' opinions on water fluoridation | journal = Community Dentistry and Oral Epidemiology | volume = 36 | issue = 2 | pages = 95–102 | date = April 2008 | pmid = 18333872 | doi = 10.1111/j.1600-0528.2007.00373.x }}</ref> A survey in ], UK, performed in 1999 found that while a 62% majority favored water fluoridation in the city, the 31% who were opposed ] with greater intensity than supporters.<ref>{{cite journal | vauthors = Dixon S, Shackley P | title = Estimating the benefits of community water fluoridation using the willingness-to-pay technique: results of a pilot study | journal = Community Dentistry and Oral Epidemiology | volume = 27 | issue = 2 | pages = 124–129 | date = April 1999 | pmid = 10226722 | doi = 10.1111/j.1600-0528.1999.tb02001.x }}</ref> Every year in the U.S., pro- and anti-fluoridationists face off in ]s or other public decision-making processes: in most of them, fluoridation is rejected.<ref name="Reilly" />
Several prominent dental researchers and government advisors who were leaders of the pro-fluoridation movement have announced reversals of their former positions after they concluded that water fluoridation is not an effective means of reducing dental caries and that it poses serious risks to human health. The late Dr. John Colquhoun was Principal Dental Officer of ], ]


== Use throughout the world ==
Dr. Hardy Limeback, BSc, PhD, ] was one of the 12 scientists who served on the ] panel that issued the aforementioned report, ''Fluoride in Drinking Water: A Scientific Review of the EPA's Standards.'' Dr. Limeback is an associate professor of dentistry and head of the preventive dentistry program at the ]. He detailed his concerns in an April 2000 letter titled, ''"Why I am now officially opposed to adding fluoride to drinking water"''.<ref name=Limeback2000>Limeback, Hardy. (2000). . Fluoride Alert.</ref>
{{Main|Fluoridation by country}}
[[File:Water-fluoridation-extent-world-equirectangular.svg|350px|thumb|alt=World map showing countries in gray, white and in various shades of red. The U.S. and Australia stand out as bright red (which the caption identifies as the 60–80% color). Brazil and Canada are medium pink (40–60%). China, much of western Europe, and central Africa are light pink (1–20%). Germany, Japan, Nigeria, and Venezuela are white (<1%).|Percentage of population receiving fluoridated water, including both artificial and natural fluoridation, as of 2012:<ref name="extent">{{cite book |chapter=The extent of water fluoridation |chapter-url=http://bfsweb.org/onemillion/09%20One%20in%20a%20Million%20-%20The%20Extent%20of%20Fluoridation.pdf |url=http://bfsweb.org/onemillion/onemillion.htm |title=One in a Million: The facts about water fluoridation |edition=2nd |year=2004 |publisher=The British Fluoridation Society, The UK Public Health Association; The British Dental Association; The Faculty of Public Health |isbn=978-0-9547684-0-9 |pages=55–80 |location=Manchester |url-status=dead |archive-url=https://web.archive.org/web/20081122032013/http://www.bfsweb.org/onemillion/onemillion.htm |archive-date=22 November 2008 |df=dmy-all }}</ref>{{div col|colwidth=5em}}
{{legend|#aa0000|{{nowrap|80–100%}}|border=1px solid #aaa}}
{{legend|#ff0000|{{nowrap|60–80%}}|border=1px solid #aaa}}
{{legend|#ff8080|{{nowrap|40–60%}}|border=1px solid #aaa}}
{{legend|#ffaaaa|{{nowrap|20–40%}}|border=1px solid #aaa}}
{{legend|#ffd5d5|{{nowrap|1–20%}}|border=1px solid #aaa}}
{{legend|#ffffff|{{nowrap|< 1%}}|border=1px solid #aaa}}
{{legend|#b9b9b9|unknown|border=1px solid #aaa}}{{div col end}}]]


A 2012 study found that 25 countries have artificial water fluoridation to varying degrees, with 11 of them delivering fluoridated water to more than 50% of their population. It found that a further 28 countries have water that is naturally fluoridated, though in many of them the fluoride concentration is above the maximum recommended level. About 435 million people worldwide received water fluoridated at the recommended level,<ref name="extent2012" /><!-- Page 56 --> with about 211 million of them living in the United States.<ref name="US-CDC-WF-Stats-2012">{{cite web |date=2018-04-20 |title=Community Water Fluoridation … 2012 Water Fluoridation Statistics |url=https://www.cdc.gov/fluoridation/statistics/2012stats.htm |access-date=13 October 2018 |work=cdc.gov}}</ref>
In a presentation to the ] Assembly Committee of Environmental Safety and Toxic Materials, Dr. Richard Foulkes, B.A., M.D., former special consultant to the Minister of Health of ], revealed:


Despite support by public health organizations and dental authorities, the practice is controversial as a public health measure; some countries and communities have discontinued it, while others have expanded it.<ref name="Scher2011" /><ref name="Tiemann2013" /> In the U.S., rejection in state and local communities is more likely when the decision is made by a public referendum; in Europe, most decisions against fluoridation have been made administratively.<ref name="Martin1989">{{cite journal | vauthors = Martin B |year=1989 |title=The sociology of the fluoridation controversy: a reexamination |journal=Sociol. Q. |volume=30 |issue=1 |pages=59–76 |doi=10.1111/j.1533-8525.1989.tb01511.x |url=http://www.uow.edu.au/~bmartin/pubs/89sq.html }}</ref> Neither side of the dispute appears to be weakening or willing to concede.<ref name="Reilly" />
<blockquote>The studies that were presented to me were selected and showed only positive results. Studies that were in existence at that time that did not fit the concept that they were "selling," were either omitted or declared to be "bad science." The endorsements had been won by coercion and the self-interest of professional elites. Some of the basic "facts" presented to me were, I found out later, of dubious validity. We are brought up to respect these persons in whom we have placed our trust to safeguard the public interest. It is difficult for each of us to accept that these may be misplaced.<ref>http://www.sonic.net/kryptox/politics/lead20s.htm</ref></blockquote>


Water fluoridation is used in the United States, United Kingdom, Ireland, Canada, Australia, Israel, Hong Kong and a handful of other countries. Most countries failed to adopt fluoridation, yet experienced the same or greater decline in cavities as those countries that did fluoridate during the later half of the twentieth century.<ref name="pmid3523258">{{cite journal | vauthors = Diesendorf M | title = The mystery of declining tooth decay | journal = Nature | volume = 322 | issue = 6075 | pages = 125–129 | date = 1986 | pmid = 3523258 | doi = 10.1038/322125a0 | bibcode = 1986Natur.322..125D | s2cid = 4357504 }}</ref> The following nations previously fluoridated their water, but stopped the practice, with the years when water fluoridation started and stopped in parentheses:
On April 15, 2008, the United States ] (NKF) updated their position on fluoridation for the first time since 1981.<ref>{{cite web|url=http://www.organicconsumers.org/articles/article_12710.cfm|title=Kidney Patients Should be Notified of Potential Risk from Fluorides and Fluoridated Drinking Water|publisher=Organic Consumers Association|date=2008-06-03|accessdate=2008-06-16}}</ref><ref>http://www.kidney.org/atoz/pdf/Fluoride_Intake_in_CKD.pdf National Kidney Foundation. Fluoride Intake in Chronic Kidney Disease. April 15, 2008.</ref> Formerly a supporter of water fluoridation, the NKF now takes a neutral position on the practice.
* Federal Republic of Germany (1952–1971)
* Sweden (1952–1971)
* Netherlands (1953–1976)
* Czechoslovakia (1955–1990)
* German Democratic Republic (1959–1990)
* Soviet Union (1960–1990)
* Finland (1959–1993)
* Japan (1952–1972)<ref>{{cite journal | vauthors = Furukawa S, Hagiwara Y, Taguchi C, Turumoto A, Kobayashi S | title = Associations between oral health behavior and anxiety about water fluoridation and motivation to establish water fluoridation in Japanese residents | journal = Journal of Oral Science | volume = 53 | issue = 3 | pages = 313–319 | date = September 2011 | pmid = 21959658 | doi = 10.2334/josnusd.53.313 | doi-access = free }}</ref>
* Israel (1981–2014, 2016–) *Mandatory by law since 2002.<ref>{{cite web | vauthors = Zwebner S | date = 17 March 2014 | url = https://www.knesset.gov.il/mmm/data/pdf/m00204.pdf | title = הפלרת מי השתייה | trans-title = Fluoridation of drinking water | language = Hebrew | pages = 2–3 | quote = Dates of beginning of Water fluoridation practice in Israel: 1981 Optional, 2002 Mandatory) | publisher = ] Research and Information Center | access-date = 2 September 2014 }}</ref><ref>{{cite web | vauthors = Main D | date = 29 August 2014 | url = http://www.newsweek.com/israel-has-officially-banned-fluoridation-its-drinking-water-267411 | title = Israel Has Officially Banned Fluoridation of Its Drinking Water | work = ] | access-date = 2 September 2014 }}</ref><ref>{{cite web |title=Water fluoridation set to return in Israel |date=11 April 2016 |url=http://www.ada.org/en/publications/ada-news/2016-archive/april/water-fluoridation-set-to-return-in-israel |work=ADA News |publisher=American Dental Association |access-date=10 January 2017 |archive-date=10 March 2019 |archive-url=https://web.archive.org/web/20190310102412/https://www.ada.org/en/publications/ada-news/2016-archive/april/water-fluoridation-set-to-return-in-israel |url-status=dead }}</ref>
Water had been fluoridated in Israel in all major cities since 1981. This was stopped by the Minister of Health in 2014<ref>{{Cite web |last=writer |first=Douglas Main Senior |date=2014-08-29 |title=Israel Bans Water Fluoridation |url=https://www.newsweek.com/israel-has-officially-banned-fluoridation-its-drinking-water-267411 |access-date=2024-12-01 |website=Newsweek |language=en}}</ref> which was met with backlash.<ref>{{Cite web |date=2014-06-22 |title=Backlash against Health Minister Yael German for her decision to stop fluoridation |url=https://www.jpost.com/Health-and-Science/Backlash-against-Health-Minister-Yael-German-for-her-decision-to-stop-fluoridation-360188 |access-date=2024-12-01 |website=The Jerusalem Post {{!}} JPost.com |language=en}}</ref> The subsequent Minister of Health in 2016 ordered the reintroduction of fluoride to Israel's public drinking water.<ref>{{Cite web |date=2017-08-22 |title=Israel's fluoridation supply expected to be restored after three years |url=https://www.jpost.com/HEALTH-SCIENCE/Israels-fluoridation-supply-expected-to-be-restored-after-three-years-503121 |access-date=2024-12-01 |website=The Jerusalem Post {{!}} JPost.com |language=en}}</ref> Due to budgetary constraints, it has never taken effect.<ref>{{Cite web |url=https://www.gov.il/en/pages/water-fluoridation |access-date=2024-12-01 |website=www.gov.il}}</ref> Dental health professionals and scholarly journals have noted the steep rise in tooth decay, especially in children due to the removal of fluoride in tap water in Israel.<ref>{{Cite journal |last1=Tobias |first1=Guy |last2=Mordechai |first2=Findler |last3=Tali |first3=Chackartchi |last4=Yaron |first4=Bernstein |last5=Beatrice |first5=Greenberg Parizer |last6=Jonathan |first6=Mann |last7=Harold |first7=Sgan-Cohen |date=2022-01-28 |title=The effect of community water fluoridation cessation on children's dental health: a national experience |journal=Israel Journal of Health Policy Research |volume=11 |issue=1 |pages=4 |doi=10.1186/s13584-022-00514-z |doi-access=free |issn=2045-4015 |pmc=8796457 |pmid=35090561}}</ref><ref>{{Cite web |title=PDF file from Editorial Manager |url=http://dx.doi.org/10.15438/rr.4.4.22 |access-date=2024-12-01 |doi=10.15438/rr.4.4.22 |doi-broken-date=2 December 2024 }}</ref>


In the United Kingdom a ] can direct a water company to fluoridate the water supply in an area if it is technically possible. The strategic health authority must consult with the local community and businesses in the affected area. The water company will act as a contractor in any new schemes and cannot refuse to fluoridate the supply.<ref>{{cite web |url=http://www.unitedutilities.com/About-your-water.aspx |title=About your water |publisher=United Utilities }}</ref> In areas with complex water sources, water fluoridation is more difficult and more costly. Alternative fluoridation methods have been proposed, and implemented in some parts of the world. The ] (WHO) is currently assessing the effects of fluoridated toothpaste, milk fluoridation and salt fluoridation in Africa, Asia, and Europe. The WHO supports fluoridation of water in some areas.<ref>{{cite web |url=https://www.who.int/entity/oral_health/media/en/orh_report03_en.pdf |title=World Oral Health Report |publisher=] |access-date=4 March 2006}}</ref> In some other countries, ] is added to table salt.<ref>{{cite web | vauthors = Ackermann-Liebrich U, Autrup H, Bard D, Calow P, Michaelidou SC, Davison J, Dekant W, de Voogt P, Gard A, Greim H, Hirvonen A, Janssen C, Linders J, Peterlin B, Tarazona J, Testai E, Vighi M | display-authors = 6 | collaboration = Scientific Committee on Health and Environmental Risks | date = 18 May 2010 |title=Critical review of any new evidence on the hazard profile, health effects, and human exposure to fluoride and the fluoridating agents of drinking water |url=http://ec.europa.eu/health/scientific_committees/environmental_risks/docs/scher_o_122.pdf | publisher = European Commission }}, citing {{cite journal | vauthors = Götzfried F | title = Production of fluoridated salt | journal = Schweizer Monatsschrift für Zahnmedizin = Revue Mensuelle Suisse d'Odonto-Stomatologie = Rivista Mensile Svizzera di Odontologia e Stomatologia | volume = 116 | issue = 4 | pages = 367–370 | year = 2006 | pmid = 16708522 }}</ref>
==The precautionary principle==


== History ==
In an analysis published in the March 2006 issue of the ''Journal of Evidence Based Dental Practice,'' the authors examine the water fluoridation controversy in the context of the ]. The authors note that:
{{Main|History of water fluoridation}}
* There are other ways of delivering fluoride besides the water supply;
* Fluoride does not need to be swallowed to prevent tooth decay;
* Tooth decay has dropped at the same rate in countries with, and without, water fluoridation;
* People are now receiving fluoride from many other sources besides the water supply;
* Studies indicate fluoride’s potential to cause a wide range of adverse, systemic effects;
* Since fluoridation affects so many people, “one might accept a lower level of proof before taking preventive actions.” <ref>Tickner J, Coffin M. (2006). ''What does the precautionary principle mean for evidence-based dentistry?'' Journal of Evidence Based Dental Practice, Issue 6, pages 6-15.</ref>


Fluoridation began during a time of great optimism and faith in science and experts (the 1950s and 1960s); even then, the public frequently objected. Opponents drew on distrust of experts and unease about medicine and science.<ref>{{cite journal | vauthors = Carstairs C, Elder R |title=Expertise, health, and popular opinion: debating water fluoridation, 1945–80 |journal=Can. Hist. Rev. |volume=89 |issue=3 |pages=345–371 |year=2008 |doi=10.3138/chr.89.3.345 }}</ref> Controversies include disputes over fluoridation's benefits and the strength of the evidence basis for these benefits, the difficulty of identifying harms, legal issues over whether water fluoride is a medicine, and the ethics of mass intervention.<ref name="ChengChalmers2007" />
==Use throughout the world==
{{main|Water fluoridation#International status}}
Water fluoridation is used in the ], ], ], and ], among other countries. The following ]s previously fluoridated their water, but stopped the practice, with the years when water fluoridation started and stopped in parentheses:
* German Federal Republic (1952-1971)
* Sweden (1952-1971)
* Netherlands (1953-1976)
* Czechoslovakia (1955-1990)
* German Democratic Republic (1959-1990)
* Soviet Union (1960-1990)
* Finland (1959-1993)
* Japan (1952-1972) <ref>http://www.kirj.ee/esi-l-k/k50-2-2.pdf</ref>


The first large fluoridation controversy occurred in Wisconsin in 1950. Fluoridation opponents questioned the ethics, safety, and efficacy of fluoridation.<ref name=Musto>{{cite journal | vauthors = Musto RJ | title = Fluoridation: why is it not more widely adopted? | journal = CMAJ | volume = 137 | issue = 8 | pages = 705–708 | date = October 1987 | pmid = 3651941 | pmc = 1267306 }}</ref> New Zealand was the second country to fluoridate, and similar controversies arose there.<ref name=Wrapson>{{cite journal | doi = 10.2307/40111610 | year = 2005 | title = Fluoridation of Public Water Supplies in New Zealand:'Magic Bullet,'Rat Poison, or Communist Plot? | journal = Health and History | volume = 7 | issue = 2 | pages = 17–29 | url = http://www.historycooperative.org/journals/hah/7.2/wrapson.html | vauthors = Wrapson J | jstor = 40111610 | access-date = 3 March 2009 | archive-url = https://web.archive.org/web/20080821170339/http://www.historycooperative.org/journals/hah/7.2/wrapson.html | archive-date = 21 August 2008 | url-status = dead}}</ref> Fears about fluoride were likely exacerbated by the reputation of fluoride compounds as insect poisons and by early literature which tended to use terms such as "toxic" and "low grade chronic ]" to describe mottling from consumption of 6&nbsp;mg/L of fluoride prior to tooth eruption, a level of consumption not expected to occur under controlled fluoridation.<ref>{{cite journal | vauthors = Richmond VL | title = Thirty years of fluoridation: a review | journal = The American Journal of Clinical Nutrition | volume = 41 | issue = 1 | pages = 129–138 | date = January 1985 | pmid = 3917599 | doi = 10.1093/ajcn/41.1.129 }}</ref> When voted upon, the outcomes tend to be negative, and thus fluoridation has had a history of gaining through administrative orders in North America.<ref name=Musto />
In 1986 the journal ] reported, ''"Large temporal reductions in tooth decay, which cannot be attributed to fluoridation, have been observed in both unfluoridated and fluoridated areas of at least eight developed countries."''<ref></ref>


] involving fluoridation are common, and include claims that fluoridation was motivated by protecting the U.S. atomic bomb program from litigation, that (as famously parodied in the film ''],'' where a deranged U.S. Air Force general claimed that it would "sap and impurify all of our precious bodily fluids") it is part of a ] or ] plot to take over the world, that it was pioneered by a German chemical company to make people submissive to those in power, that behind the scenes it is promoted by the sugary food or phosphate fertilizer or aluminium industries, or that it is a smokescreen to cover failure to provide dental care to the poor.<ref name=Armfield /> One such theory is that fluoridation was a ] ruse sponsored by fluoride polluters such as the aluminium maker ] and the ], with conspirators that included industrialist ] and the ]'s researcher Gerald J. Cox, the Kettering Laboratory of the ], the ]'s administrator Oscar R. Ewing, and public-relations strategist ].{{sfn|Freeze|Lehr|2009|pp=127–169}} Specific antifluoridation arguments change to match the spirit of the time.<ref>{{cite journal | vauthors = Newbrun E | title = The fluoridation war: a scientific dispute or a religious argument? | journal = Journal of Public Health Dentistry | volume = 56 | issue = 5 Spec No | pages = 246–252 | year = 1996 | pmid = 9034969 | doi = 10.1111/j.1752-7325.1996.tb02447.x }}</ref>
In areas with complex water sources, water fluoridation is more difficult and more costly. Alternative fluoridation methods have been proposed, and implemented in some parts of the world. The ] is currently assessing the effects of fluoridated toothpaste, milk fluoridation and salt fluoridation in ], ], and ]. The ] supports fluoridation of water in some areas, and encourages removal of fluoride where fluoride content in water is too high. <ref> (in pdf format), from the website, accessed on 4 March, 2006.</ref>


] by the Keep America Committee, alleging that fluoridation was a Communist plot]]
==Court cases==
===United States===


Outside North America, water fluoridation was adopted in some European countries, but in the late 1970s and early 1980s, Denmark and Sweden banned fluoridation when government panels found insufficient evidence of safety, and the Netherlands banned water fluoridation when "a group of medical practitioners presented evidence" that it caused negative effects in a percentage of the population.{{Citation needed|date=July 2024}}
Fluoridation has been the subject of many court cases. Activists have sued municipalities, asserting that their rights to consent to medical treatment, ], and ] are infringed by mandatory water fluoridation.<ref>Cross, D. W., R. J. Carton. , abstract from website, page accessed 19 March, 2006.</ref> Individuals have sued municipalities for a number of illnesses that they believe were caused by fluoridation of the city's water supply. So far, the majority of courts have held in favor of cities in such cases, finding no or only a tenuous connection between health problems and widespread water fluoridation.<ref name="beck">Beck v. City Council of Beverly Hills, 30 Cal. App. 3d 112, 115 (Cal. App. 2d Dist. 1973) ("Courts through the United States have uniformly held that fluoridation of water is a reasonable and proper exercise of the police power in the interest of public health. The matter is no longer an open question." (citations omitted)).</ref> To date, no federal appellate court or state court of last resort (i.e., state supreme court) has found water fluoridation to be unlawful.<ref>Pratt, Edwin, Raymond D. Rawson & Mark Rubin, ''Fluoridation at Fifty: What Have We Learned'', 30 J.L. Med. & Ethics 117, 119 (Fall 2002)</ref>


=== Communist conspiracy theory (1940s–1960s) ===
====Early cases====
A flurry of cases were heard in numerous state courts across the U.S. in the 1950s during the early years of water fluoridation. State courts consistently held in favor of allowing fluoridation to continue, analogizing fluoridation to mandatory vaccination and the use of other chemicals to clean the public water supply, both of which had a long-standing history of acceptance by courts.


Water fluoridation has frequently been the subject of conspiracy theories. During the "]" in the United States during the late 1940s and 1950s, and to a lesser extent in the 1960s, activists on the far right of American politics routinely asserted that fluoridation was part of a far-reaching plot to impose a socialist or communist regime. These opponents believed it was "another aspect of President ]'s drive to socialize medicine."<ref name="Henigbook1996">{{cite book| vauthors = Henig RM | title=The People's Health: A Memoir of Public Health and Its Evolution at Harvard| publisher = Joseph Henry Press | year = 2016 |isbn=978-0309054928}}</ref> They also opposed other public health programs, notably mass ] and ] services.{{sfn|Henig|2016|p=85}} Their views were influenced by opposition to a number of major social and political changes that had happened in recent years: the growth of internationalism, particularly the UN and its programs; the introduction of ]s, particularly the various programs established by the ]; and government efforts to reduce perceived inequalities in the ].<ref name="Rovere">{{cite book | vauthors = Rovere RH | title = Senator Joe McCarthy | publisher = University of California Press | year = 1959 | pages = 21–22| isbn = 978-0520204720 }}</ref>
In 1952, a ] was adopted that stated in part, "The ] will regard water supplies containing fluorine, within the limitations recommended
by the Public Health Service, as not actionable under the ]."<ref>17 Fed. Reg. 6743 (July 23, 1952).</ref> <!--what exactly did this do?-->


Others asserted the existence of "a Communist plot to deplete the brainpower and sap the strength of a generation of American children".<ref name="Henigbook1996" /> Charles Betts, a prominent anti-fluoridationist, charged that fluoridation was "better than using the atom bomb because the atom bomb has to be made, has to be transported to the place it is to be set off while poisonous fluorine has been placed right beside the water supplies by the Americans themselves ready to be dumped into the water mains whenever a Communist desires!" Similarly, a right-wing newsletter, the ''American Capsule News'', claimed that "the Soviet General Staff is very happy about it. Anytime they get ready to strike, and their ] takes over, there are tons and tons of this poison 'standing by' municipal and military water systems ready to be poured in within 15 minutes."<ref name="Johnston" /> This controversy had a direct impact on local program during the 1950s and 1960s, where referendums on introducing fluoridation were defeated in over a thousand Florida communities. It was not until as late as the 1990s that fluoridated water was consumed by the majority of the population of the United States.{{sfn|Henig|2016|p=85}}
The ] analogized water fluoridation to mandatory vaccination in a 1954 case.<ref name="dowell">273 P.2d 859, 862-63 (Okl. 1954) (available at )</ref> The court noted, "we think the weight of well-reasoned modern precedent sustains the right of municipalities to adopt such reasonable and undiscriminating measures to improve their water supplies as are necessary to protect and improve the public health, even though no epidemic is imminent and no contagious disease or virus is directly involved . . . . To us it seems ridiculous and of no consequence in considering the public health phase of the case that the substance to be added to the water may be classed as a mineral rather than a drug, antiseptic or germ killer; just as it is of little, if any, consequence whether fluoridation accomplishes its beneficial result to the public health by killing germs in the water, or by hardening the teeth or building up immunity in them to the bacteria that causes caries or tooth decay. If the latter, there can be no distinction on principle between it and compulsory vaccination or inoculation, which, for many years, has been well-established as a valid exercise of police power."<ref name="dowell">273 P.2d 859, 862-63 (Okl. 1954) (available at )</ref>


The communist conspiracy argument declined in influence by the mid-1960s, becoming associated in the public mind with irrational fear and paranoia. It was portrayed in ]'s 1964 film '']'', in which the character General Jack D. Ripper initiates a nuclear war in the hope of thwarting a communist plot to "sap and impurify" the "precious bodily fluids" of the American people with fluoridated water. Another satire appeared in the 1967 movie '']'', in which a character's fear of fluoridation is used to indicate that he is insane. Some anti-fluoridationists claimed that the conspiracy theories were damaging their goals; Frederick Exner, an anti-fluoridation campaigner in the early 1960s, told a conference: "most people are not prepared to believe that fluoridation is a communist plot, and if you say it is, you are successfully ridiculed by the promoters. It is being done, effectively, every day ... some of the people on our side are the fluoridators' 'fifth column'."<ref name="Johnston" />
In the 1955 case ''Froncek v. City of Milwaukee'', the ] affirmed the ruling of a circuit court which held that "the fluoridation is not the practice of medicine, dentistry, or pharmacy, by the City" and that "the legislation is a public health measure, bearing a real, substantial, and reasonable relation to the health of the city."<ref>69 N.W.2d 242, 252 (Wis. 1955)</ref>


=== Later conspiracy theories ===
The ], in 1955's ''Kraus v. City of Cleveland'', said, "Plaintiff's argument that fluoridation constitutes mass medication, the unlawful practice of medicine and adulteration may be answered as a whole. Clearly, the addition of fluorides to the water supply does not violate such principles any more than the chlorination of water, which has been held valid many times."<ref>127 N.E.2d 609, 613 (Ohio 1955)</ref>
In 1987, Ian E. Stephens authored a self-published booklet, an extract of which was published in the Australian ] publication '']'' in 1995. In it he claimed he was told by "Charles Elliot Perkins" that: "Repeated doses of infinitesimal amounts of fluoride will in time reduce an individual's power to resist domination by slowly poisoning and narcotising a certain area of the brain and will thus make him submissive to the will of those who wish to govern him ... Both the Germans and the Russians added sodium fluoride to the drinking water of prisoners of war to make them stupid and docile." These statements have been dismissed by reputable ] historians as untrue, but they are regularly repeated to the present day in conspiracy publications and websites.<ref>{{cite web|publisher=Politifact Florida|url=http://www.politifact.com/florida/statements/2011/oct/06/critics-water-fluoridation/truth-about-fluoride-doesnt-include-nazi-myth/|title=Truth about fluoride doesn't include Nazi myth
|access-date=7 March 2014}}</ref>


=== 2006 US NRC report ===
====Fluoridation consensus====
U.S. opponents of fluoridation were heartened by a 2006 ] report about hazards of water naturally fluoridated to high levels;<ref name=Fagin /> the report recommended lowering the U.S. maximum limit of 4&nbsp;mg/L for fluoride in drinking water. The EPA did not act on that recommendation.<ref>{{cite book |title=Fluoride in Drinking Water: A Scientific Review of EPA's Standards |author=National Research Council |location=Washington, DC |publisher=National Academies Press |isbn=030910128X |year=2006 |url=http://books.nap.edu/catalog.php?record_id=11571 }}</ref>
In 1973, as cases continued to be brought in state courts, a consensus developed that fluoridation, at least from a legal standpoint, was acceptable.<ref name="beck">Beck v. City Council of Beverly Hills, 30 Cal. App. 3d 112, 115 (Cal. App. 2d Dist. 1973) (citations omitted).</ref> In 1973's ''Beck v. City Council of Beverly Hills'', the ], Second District, said, "Courts through the United States have uniformly held that fluoridation of water is a reasonable and proper exercise of the ] in the interest of public health. The matter is no longer an open question."<ref name="beck" />


== Court cases ==
====Contemporary challenges====
=== Ireland ===
In ''Ryan v. Attorney General'' (1965), the ] held that water fluoridation did not infringe the plaintiff's right to bodily integrity.<ref>{{cite web |url=http://www.bailii.org/ie/cases/IESC/1965/1.html |title=Ryan v. A.G. IESC 1; IR 294 (3 July, 1965) |publisher=Irish Supreme Court }}</ref> The court found that such a right to bodily integrity did exist, even though it was not explicitly mentioned in the ], thus establishing the doctrine of ] in Irish constitutional law.


=== Netherlands ===
Advocates continue to make contemporary challenges to the spread of fluoridation. For instance, in 2002, the city of ], ] chose to disregard a California law mandating fluoridation of water systems with 10,000 or more hookups, and the dispute between the city and the state ended up in court. The trial court and the intermediate appellate court ruled in favor of the state and its fluoridation mandate, however, and the Supreme Court of California declined to hear the case in February of 2006.<ref>Jones, Donna Santa Cruz Sentinel. February 10, 2006.</ref> Since 2000, courts in Washington,<ref>Parkland Light & Water Co. v. Tacoma-Pierce County Bd. of Health, 90 P.3d 37 (Wash. 2004)</ref> Maryland,<ref>Pure Water Committee of W. MD., Inc. v. Mayor and City Council of Pure Water Comm. of W. MD., Inc. v. Mayor and City Council of Cumberland, MD. Not Reported in F.Supp.2d, 2003 WL 22095654 (D.Md. 2003)</ref> and Texas<ref>Espronceda v. City of San Antonio, Not Reported in S.W.3d, 2003 WL 21203878 (Tex. App.-San Antonio 2003)</ref> have reached similar conclusions. Citizens for Safe Drinking Water is raising money to support a lawsuit in federal court seeking an injunction against public water districts' use of unapproved drugs in the drinking water supply in the United States.<ref></ref>
Water was fluoridated in large parts of the Netherlands from 1960 to 1973, at which point the ] declared fluoridation of drinking water unauthorized.<ref>{{cite journal|url=https://books.google.com/books?id=3UoZAAAAIAAJ&q=fluoridering+nederland&pg=PA487 | vauthors = van der Lek B |title=De strijd tegen fluoridering |journal=De Gids |volume=139 |issue=2 |year=1976 }}</ref> The Dutch Court decided that authorities had no legal basis for adding chemicals to drinking water if they did not also improve safety. It was also stated as support that consumers cannot choose a different tap water provider.<ref>{{cite book| vauthors = Damen LJ, Nicolaï P, Boxum JL, de Graaf KJ, Jans JH, Klap AP, Marseille AT, Neerhof AR, Olivier BK, Schueler BJ, Vermeer FR, Vucsán RL | display-authors = 6 |year=2005 |series=Boom juridische studieboeken |title=Bestuursrecht |trans-title=Control rights (legal) |chapter=Deel 1: systeem, bevoegdheid, bevoegdheidsuitoefening, handhaving |language=nl |publisher=Boom Juridische uitgevers |pages=54–55 |isbn=978-9054545378}}</ref> Drinking water has not been fluoridated in any part of the Netherlands since 1973.


===Republic of Ireland=== === United States ===
{{See also|Water fluoridation in the United States}}
In ''Ryan v. Attorney General'' (1965), the ] held that water fluoridation did not infringe the plaintiff's right to bodily integrity.<ref> &mdash; ''text of the Irish Supreme Court's judgement''</ref> However, the court found that such a right to bodily integrity did exist, despite the fact that it was not explicitly mentioned in the ], thus establishing the doctrine of ] in Irish constitutional law.
Fluoridation has been the subject of many ] wherein activists have sued municipalities, asserting that their rights to consent to medical treatment and ] are infringed by mandatory water fluoridation.<ref name=Cross2003 /> Individuals have sued municipalities for a number of illnesses that they believe were caused by fluoridation of the city's water supply. In most of these cases, the courts have held in favor of cities, finding no or only a tenuous connection between health problems and widespread water fluoridation.<ref name="beck">{{cite web | title = Beck v. City Council of Beverly Hills, 30 Cal. App. 3d 112, 115 (Cal. App. 2d Dist. 1973) | quote = Courts through the United States have uniformly held that fluoridation of water is a reasonable and proper exercise of the police power in the interest of public health. The matter is no longer an open question. | url = https://casetext.com/case/beck-v-city-council-of-beverly-hills }}</ref> To date, no federal appellate court or state court of last resort (i.e., state supreme court) has found water fluoridation to be unlawful.<ref name="Pratt_2002">{{cite journal | vauthors = Pratt E, Rawson RD, Rubin M | title = Fluoridation at fifty: what have we learned? | journal = The Journal of Law, Medicine & Ethics | volume = 30 | issue = 3 Suppl | pages = 117–121 | date = 2002 | pmid = 12508513 | doi = | url = https://heinonline.org/HOL/LandingPage?handle=hein.journals/medeth30&div=69&id=&page= }}</ref>


In September 2024, in ''] et al. v. ]'',<ref>https://www.cand.uscourts.gov/food-and-water-watch-v-us-epa/</ref>U.S. Federal Judge Edward Chen ruled that water fluoridation posed an, ''“unreasonable risk of reduced ] in children…a risk sufficient to require the EPA to engage with a regulatory response…One thing the EPA cannot do, however, in the face of this Court’s finding, is to ignore that risk.”''<ref>https://news.bloomberglaw.com/environment-and-energy/epa-must-reduce-fluorides-risks-to-childrens-iq-court-says</ref>
==References==
===Footnotes===
{{reflist|2}}


==External links== == See also ==
* * ]
* ]
* {{DMOZ|Society/Issues/Health/Water_Treatment/Fluoridation/|Water fluoridation}}
* ]
* ]

== References ==
{{Reflist}}

== Further reading ==
{{refbegin}}
* {{cite book| title=Fluoride in Drinking-water | vauthors = Fawell J, Bailey K, Chilton J, Dahi E, Fewtrell L, Magara Y | publisher=World Health Organization | isbn=92-4-156319-2 | year=2006 | url=https://www.who.int/water_sanitation_health/publications/fluoride_drinking_water_full.pdf| ref=CITEREFFawell_et_al.2006}}
* {{cite book | vauthors = Martin B |author-link=Brian Martin (social scientist) |url=http://www.bmartin.cc/pubs/91skic.html |title=Scientific knowledge in controversy: the social dynamics of the fluoridation debate |location=Albany |publisher=State University of New York Press |year=1991 |isbn=978-0-7914-0538-3 }}
* {{cite book | vauthors = Martin B | author-link1 = Brian Martin (social scientist) | title = The Controversy Manual |date=2014 | location = Sparsnäs, Sweden | publisher = Irene Publishing |isbn=978-1-291-67241-1 | url = http://www.bmartin.cc/pubs/14cm/14cm.pdf }}
{{refend}}

== External links ==
* {{cite web | vauthors = Hicks J | date = 24 June 2011 | url = https://www.sciencehistory.org/distillations/magazine/pipe-dreams-americas-fluoride-controversy | title = Pipe Dreams: America's Fluoride Controversy | work = Distillations | publisher = Science History Institute }} – description of the history and controversy of fluoridated drinking water
* {{Skeptoid | id=4058 | number= 58 | title= All About Fluoridation| date= July 30, 2007| access-date=28 June 2022}}

{{Consumer food safety}}
{{Conspiracy theories}}
{{Portal bar|Medicine|Politics}}


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Latest revision as of 20:26, 17 December 2024

Debate over the anti-tooth-decay measure

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The water fluoridation controversy arises from political, ethical, economic, and health considerations regarding the fluoridation of public water supplies. For deprived groups in both maturing and matured countries, international and national agencies and dental associations across the world support the safety and effectiveness of water fluoridation. Proponents of water fluoridation see it as a question of public health policy and equate the issue to vaccination and food fortification, citing significant benefits to dental health and minimal risks. In contrast, opponents of water fluoridation view it as an infringement of individual rights, if not an outright violation of medical ethics, on the basis that individuals have no choice in the water that they drink, unless they drink more expensive bottled water. A small minority of scientists have challenged the medical consensus, variously claiming that water fluoridation has no or little cariostatic benefits, may cause serious health problems, is not effective enough to justify the costs, and is pharmacologically obsolete.

Opposition to fluoridation has existed since its initiation in the 1940s. During the 1950s and 1960s, now-debunked conspiracy theorists claimed that fluoridation was a communist plot to undermine American public health. In recent years, water fluoridation has become a prevalent health and political issue in many countries, resulting in some countries and communities discontinuing its use while others have expanded it. The controversy is propelled by a significant public opposition supported by a minority of professionals, which include researchers, dental and medical professionals, alternative medical practitioners, health food enthusiasts, a few religious groups (mostly Christian Scientists in the U.S.), and occasionally consumer groups and environmentalists. Organized political opposition has come from libertarians, the John Birch Society, the Ku Klux Klan, Robert F. Kennedy Jr, and the Green Party of the United States.

Proponents of fluoridation have been criticized for overstating the benefits, while opponents have been criticized for understating them and for overstating the risks. Systematic reviews have cited the lack of high quality research for the benefits and risks of water fluoridation and questions that are still unsettled. Researchers who oppose the practice state this as well. According to a 2013 Congressional Research Service report on fluoride in drinking water, these gaps in the fluoridation scientific literature fuel the controversy.

Public water fluoridation was first practiced in 1945, in the U.S. As of 2015, about 25 countries have supplemental water fluoridation to varying degrees, and 11 of them have more than 50% of their population drinking fluoridated water. A further 28 countries have water that is naturally fluoridated, though in many of them there are areas where fluoride is above the optimum level. As of 2012, about 435 million people worldwide received water fluoridated at the recommended level, of whom 57 million (13%) received naturally fluoridated water and 377 million (87%) received artificially fluoridated water. In 2014, three-quarters of the US population on the public water supply received fluoridated water, which represented two-thirds of the total US population.

Medical consensus

National and international health agencies and dental associations throughout the world have endorsed water fluoridation as safe and effective. The views on the most effective method for community prevention of tooth decay are mixed. The Australian government states that water fluoridation is the most effective means of achieving fluoride exposure that is community-wide. The World Health Organization states water fluoridation, when feasible and culturally acceptable, has substantial advantages, especially for subgroups at high risk, while the European Commission finds no advantage to water fluoridation compared with topical use.

FDI World Dental Federation supports water fluoridation as safe and effective. the European Academy of Paediatric Dentistry, and the national dental associations of Australia, Canada, and the U.S. The American Dental Association calls water fluoridation "one of the safest and most beneficial, cost-effective public health measures for preventing, controlling, and in some cases reversing, tooth decay."

In the English speaking nations—the United States, Canada, UK, Australia and New Zealand, all of which practice water fluoridation—many medical associations and authorities have published position statements and endorsed water fluoridation. The U.S. Surgeon General, the American Public Health Association, the Royal Commission on the National Health Service, Australian Medical Association, New Zealand Medical Association, and Health Canada support fluoridation, citing a number of international scientific reviews that indicate "there is no link between any adverse health effects and exposure to fluoride in drinking water at levels that are below the maximum acceptable concentration of 1.5 mg/L." The Centers for Disease Control and Prevention listed water fluoridation as one of the ten great public health achievements of the 20th century in the U.S., along with vaccination, family planning, recognition of the dangers of smoking, and other achievements.

In Israel, the Israeli Association of Public Health Physicians, the Israel Pediatric Association, and the Israel Dental Association, support fluoridation. The World Health Organization, looking at global public health, identifies fluoride as one of a few chemicals for which the contribution from drinking-water to overall intake is an important factor in preventing disease. This is because there is clear evidence that optimal concentrations of fluoride provide protection against cavities, both in children and in adults.

Minority scientific view

The scientists or doctors who oppose water fluoridation argue that it has no or little cariostatic benefits, may cause serious health problems, is not effective enough to justify the costs, and is pharmacologically obsolete.

Evidence

Proponents and opponents have been both criticized for overstating the benefits or risks, and understating the other, respectively. Systematic reviews have cited the lack of high-quality research for the benefits and risks of water fluoridation and questions that are still unsettled. A 2007 Nuffield Council on Bioethics report concluded that good evidence for or against water fluoridation is lacking. Researchers who oppose the practice state this as well. According to a 2013 Congressional Research Service report on fluoride in drinking water, these gaps in the fluoridation scientific literature fuel the controversy. John Doull, chairman of the 2006 National Research Council committee report on fluoride in drinking water, has stated a similar conclusion regarding the source of the controversy: "In the scientific community, people tend to think this is settled. I mean, when the U.S. surgeon general comes out and says this is one of the 10 greatest achievements of the 20th century, that's a hard hurdle to get over. But when we looked at the studies that have been done, we found that many of these questions are unsettled and we have much less information than we should, considering how long this has been going on. I think that's why fluoridation is still being challenged so many years after it began. In the face of ignorance, controversy is rampant."

Safety

Main article: Water fluoridation § Safety

Fluoride can be present naturally in water at concentrations well above recommended levels, which can have several long-term adverse effects, including severe dental fluorosis, skeletal fluorosis, and weakened bones. In 1984 the World Health Organization recommended a guideline maximum fluoride value of 1.5 mg/L as a level at which fluorosis should be minimal, reaffirming it in 2006.

Fluoridation has little effect on risk of bone fracture (broken bones); it may result in slightly lower fracture risk than either excessively high levels of fluoridation or no fluoridation. There is no clear association between fluoridation and cancer or deaths due to cancer, both for cancer in general and specifically for bone cancer and osteosarcoma.

In rare cases improper implementation of water fluoridation can result in overfluoridation that causes outbreaks of acute fluoride poisoning, with symptoms that include nausea, vomiting, and diarrhea. Three such outbreaks were reported in the U.S. between 1991 and 1998, caused by fluoride concentrations as high as 220 mg/L; in the 1992 Alaska outbreak, 262 people became ill and one person died. In 2010, approximately 60 gallons of fluoride were released into the water supply in Asheboro, North Carolina, in 90 minutes—an amount that was intended to be released in a 24-hour period.

Like other common water additives such as chlorine, hydrofluosilicic acid and sodium silicofluoride decrease pH and cause a small increase of corrosivity, but this problem is easily addressed by increasing the pH. Although it has been hypothesized that hydrofluosilicic acid and sodium silicofluoride might increase human lead uptake from water, a 2006 statistical analysis did not support concerns that these chemicals cause higher blood lead concentrations in children. Trace levels of arsenic and lead may be present in fluoride compounds added to water; however, concentrations are below measurement limits.

The effect of water fluoridation on the natural environment has been investigated, and no adverse effects have been established. Issues studied have included fluoride concentrations in groundwater and downstream rivers; lawns, gardens, and plants; consumption of plants grown in fluoridated water; air emissions; and equipment noise.

Efficacy

Main article: Water fluoridation § Effectiveness

Reviews have shown that water fluoridation reduces cavities in children. A conclusion for the efficacy in adults is less clear with some reviews finding benefit and others not. Studies in the U.S. in the 1950s and 1960s showed that water fluoridation reduced childhood cavities by fifty to sixty percent, while studies in 1989 and 1990 showed lower reductions (40% and 18% respectively), likely due to increasing use of fluoride from other sources, notably toothpaste, and the "halo effect" of food and drink that is made in fluoridated areas and consumed in unfluoridated ones.

A 2000 UK systematic review (York) found that water fluoridation was associated with a decreased proportion of children with cavities of 15% and with a decrease in decayed, missing, and filled primary teeth (average decreases was 2.25 teeth). The review found that the evidence was of moderate quality: few studies attempted to reduce observer bias, control for confounding factors, report variance measures, or use appropriate analysis. Although no major differences between natural and artificial fluoridation were apparent, the evidence was inadequate for a conclusion about any differences. A 2002 systematic review found strong evidence that water fluoridation is effective at reducing overall tooth decay in communities. A 2015 Cochrane review also found benefit in children.

Fluoride may also prevent cavities in adults of all ages. A 2007 meta-analysis by CDC researchers found that water fluoridation prevented an estimated 27% of cavities in adults, about the same fraction as prevented by exposure to any delivery method of fluoride (29% average). A 2011 European Commission review concluded that water fluoridation has no known advantage over topical prevention (e.g. through fluoride toothpaste). It also found that water fluoridation has limited benefit for adults, because the continued administration of systemic fluoride after the permanent teeth have erupted has questionable efficacy in preventing tooth decay. A 2015 Cochrane review found no conclusive research in adults.

Most countries in Europe have experienced substantial declines in cavities without the use of water fluoridation. For example, in Finland and Germany, tooth decay rates remained stable or continued to decline after water fluoridation stopped. Fluoridation may be useful in the U.S. because unlike most European countries, the U.S. does not have school-based dental care, many children do not visit a dentist regularly, and for many U.S. children water fluoridation is the prime source of exposure to fluoride. The effectiveness of water fluoridation can vary according to circumstances such as whether preventive dental care is free to all children.

Ethics

Water fluoridation pits the common good against individual rights. Some say the common good overrides individual rights, and equate it to vaccination and food fortification. Others say that individual rights override the common good, and say that individuals have no choice in the water that they drink, unless they drink more expensive bottled water, and some argue unequivocally that it does not stand up to scrutiny relative to the Nuremberg Code and other codes of medical ethics.

Those who emphasize the public good emphasize the medical consensus that appropriate levels of water fluoridation are safe and effective to prevent cavities and see it as a public health intervention, replicating the benefits of naturally fluoridated water, which can free people from the misery and expense of tooth decay and toothache, with the greatest benefit accruing to those least able to help themselves. This perspective suggests it would be unethical to withhold such treatment. In her book 50 Health Scares That Fizzled, Joan Callahan writes that, "For lower-income people with no insurance, fluoridated water (like enriched flour and fortified milk) looks more like a free preventative health measure that a few elitists are trying to take away."

Those who emphasize individual or local choice, may view fluoridation as a violation of ethical or legal rules that prohibit medical treatment without medical supervision or informed consent or that prohibit administration of unlicensed medical substances, view it as "mass medication", or may even characterize it as a violation of the Nuremberg Code and the Council of Europe's Biomedical Convention of 1999. Another journal article suggested applying the precautionary principle to this controversy, which calls for public policy to reflect a conservative approach to minimize risk in the setting where harm is possible (but not necessarily confirmed) and where the science is not settled. Others have opposed it on the grounds of potential financial conflicts of interest driven by the chemical industry.

A 2007 Nuffield Council on Bioethics report reached a conclusion mainly on three points, stating that :

  • The balance of benefit to risk ratio – is unclear due to the lack of good evidence for or against water fluoridation.
  • Alternatives to the practice exist – topical fluoride therapy (toothbrushing, etc.)
  • The role of consent – it gets priority when there are potential harms.

The report therefore concluded that local and regional democratic procedures are the most appropriate way to decide whether to fluoridate.

Opposition groups and campaigns

The controversy is propelled by a significant public opposition supported by a minority of professionals, including researchers, dental and medical professionals, alternative medical practitioners such as chiropractors, health food enthusiasts, a few religious groups (mostly Christian Scientists in the U.S.), and occasionally consumer groups and environmentalists. Organized political opposition has come from libertarians, the John Birch Society, the Ku Klux Klan, and from groups like the Green parties in the UK and New Zealand.

Opposition campaigns involve newspaper articles, talk radio, and public forums. Media reporters are often poorly equipped to explain the scientific issues, and are motivated to present controversy regardless of the underlying scientific merits. Websites, which are increasingly used by the public for health information, contain a wide range of material about fluoridation ranging from factual to fraudulent, with a disproportionate percentage opposed to fluoridation. Antifluoridationist literature links fluoride exposure to a wide variety of effects, including AIDS, allergy, Alzheimer's disease, arthritis, cancer, and low IQ, along with diseases of the gastrointestinal tract, kidney, pineal gland, and thyroid, though there is no scientific evidence linking fluoridation to these adverse health effects.

Public opinion

Many people do not know that fluoridation is meant to prevent tooth decay, or that natural or bottled water can contain fluoride. As fluoridation does not appear to be an important issue for the general public in the U.S., the debate may reflect an argument between two relatively small lobbies for and against fluoridation. A survey of Australians in 2009 found that 70% supported and 15% opposed fluoridation. Those opposed were much more likely to score higher on outrage factors such as "unclear benefits".

A study of focus groups from 16 European countries in 2003 found that fluoridation was opposed by a majority of focus group members in most of the countries, including France, Germany, and the UK. A survey in Sheffield, UK, performed in 1999 found that while a 62% majority favored water fluoridation in the city, the 31% who were opposed expressed their preference with greater intensity than supporters. Every year in the U.S., pro- and anti-fluoridationists face off in referendums or other public decision-making processes: in most of them, fluoridation is rejected.

Use throughout the world

Main article: Fluoridation by country
World map showing countries in gray, white and in various shades of red. The U.S. and Australia stand out as bright red (which the caption identifies as the 60–80% color). Brazil and Canada are medium pink (40–60%). China, much of western Europe, and central Africa are light pink (1–20%). Germany, Japan, Nigeria, and Venezuela are white (<1%).
Percentage of population receiving fluoridated water, including both artificial and natural fluoridation, as of 2012:   80–100%   60–80%   40–60%   20–40%   1–20%   < 1%   unknown

A 2012 study found that 25 countries have artificial water fluoridation to varying degrees, with 11 of them delivering fluoridated water to more than 50% of their population. It found that a further 28 countries have water that is naturally fluoridated, though in many of them the fluoride concentration is above the maximum recommended level. About 435 million people worldwide received water fluoridated at the recommended level, with about 211 million of them living in the United States.

Despite support by public health organizations and dental authorities, the practice is controversial as a public health measure; some countries and communities have discontinued it, while others have expanded it. In the U.S., rejection in state and local communities is more likely when the decision is made by a public referendum; in Europe, most decisions against fluoridation have been made administratively. Neither side of the dispute appears to be weakening or willing to concede.

Water fluoridation is used in the United States, United Kingdom, Ireland, Canada, Australia, Israel, Hong Kong and a handful of other countries. Most countries failed to adopt fluoridation, yet experienced the same or greater decline in cavities as those countries that did fluoridate during the later half of the twentieth century. The following nations previously fluoridated their water, but stopped the practice, with the years when water fluoridation started and stopped in parentheses:

  • Federal Republic of Germany (1952–1971)
  • Sweden (1952–1971)
  • Netherlands (1953–1976)
  • Czechoslovakia (1955–1990)
  • German Democratic Republic (1959–1990)
  • Soviet Union (1960–1990)
  • Finland (1959–1993)
  • Japan (1952–1972)
  • Israel (1981–2014, 2016–) *Mandatory by law since 2002.

Water had been fluoridated in Israel in all major cities since 1981. This was stopped by the Minister of Health in 2014 which was met with backlash. The subsequent Minister of Health in 2016 ordered the reintroduction of fluoride to Israel's public drinking water. Due to budgetary constraints, it has never taken effect. Dental health professionals and scholarly journals have noted the steep rise in tooth decay, especially in children due to the removal of fluoride in tap water in Israel.

In the United Kingdom a strategic health authority can direct a water company to fluoridate the water supply in an area if it is technically possible. The strategic health authority must consult with the local community and businesses in the affected area. The water company will act as a contractor in any new schemes and cannot refuse to fluoridate the supply. In areas with complex water sources, water fluoridation is more difficult and more costly. Alternative fluoridation methods have been proposed, and implemented in some parts of the world. The World Health Organization (WHO) is currently assessing the effects of fluoridated toothpaste, milk fluoridation and salt fluoridation in Africa, Asia, and Europe. The WHO supports fluoridation of water in some areas. In some other countries, sodium fluoride is added to table salt.

History

Main article: History of water fluoridation

Fluoridation began during a time of great optimism and faith in science and experts (the 1950s and 1960s); even then, the public frequently objected. Opponents drew on distrust of experts and unease about medicine and science. Controversies include disputes over fluoridation's benefits and the strength of the evidence basis for these benefits, the difficulty of identifying harms, legal issues over whether water fluoride is a medicine, and the ethics of mass intervention.

The first large fluoridation controversy occurred in Wisconsin in 1950. Fluoridation opponents questioned the ethics, safety, and efficacy of fluoridation. New Zealand was the second country to fluoridate, and similar controversies arose there. Fears about fluoride were likely exacerbated by the reputation of fluoride compounds as insect poisons and by early literature which tended to use terms such as "toxic" and "low grade chronic fluoride poisoning" to describe mottling from consumption of 6 mg/L of fluoride prior to tooth eruption, a level of consumption not expected to occur under controlled fluoridation. When voted upon, the outcomes tend to be negative, and thus fluoridation has had a history of gaining through administrative orders in North America.

Conspiracy theories involving fluoridation are common, and include claims that fluoridation was motivated by protecting the U.S. atomic bomb program from litigation, that (as famously parodied in the film Dr. Strangelove, where a deranged U.S. Air Force general claimed that it would "sap and impurify all of our precious bodily fluids") it is part of a Communist or New World Order plot to take over the world, that it was pioneered by a German chemical company to make people submissive to those in power, that behind the scenes it is promoted by the sugary food or phosphate fertilizer or aluminium industries, or that it is a smokescreen to cover failure to provide dental care to the poor. One such theory is that fluoridation was a public-relations ruse sponsored by fluoride polluters such as the aluminium maker Alcoa and the Manhattan Project, with conspirators that included industrialist Andrew Mellon and the Mellon Institute's researcher Gerald J. Cox, the Kettering Laboratory of the University of Cincinnati, the Federal Security Agency's administrator Oscar R. Ewing, and public-relations strategist Edward Bernays. Specific antifluoridation arguments change to match the spirit of the time.

Black-and-white political cartoon of a leering skull menacing a doll-holding little girl whose back is supported by an arm tagged "UNINFORMED PUBLIC". Nearby bones hold three large balls labeled "FLUORIDATED WATER", "POLIO MONKEY SERUMS", and "MENTAL HYGIENE etc." The cartoon is entitled "At the Sign of THE UNHOLY THREE", signed "B. SMART", and captioned "Are you willing to PUT IN PAWN to the UNHOLY THREE all of the material, mental, and spiritual resources of this GREAT REPUBLIC?"
Illustration in a 1955 flier by the Keep America Committee, alleging that fluoridation was a Communist plot

Outside North America, water fluoridation was adopted in some European countries, but in the late 1970s and early 1980s, Denmark and Sweden banned fluoridation when government panels found insufficient evidence of safety, and the Netherlands banned water fluoridation when "a group of medical practitioners presented evidence" that it caused negative effects in a percentage of the population.

Communist conspiracy theory (1940s–1960s)

Water fluoridation has frequently been the subject of conspiracy theories. During the "Second Red Scare" in the United States during the late 1940s and 1950s, and to a lesser extent in the 1960s, activists on the far right of American politics routinely asserted that fluoridation was part of a far-reaching plot to impose a socialist or communist regime. These opponents believed it was "another aspect of President Truman's drive to socialize medicine." They also opposed other public health programs, notably mass vaccination and mental health services. Their views were influenced by opposition to a number of major social and political changes that had happened in recent years: the growth of internationalism, particularly the UN and its programs; the introduction of social welfare provisions, particularly the various programs established by the New Deal; and government efforts to reduce perceived inequalities in the social structure of the United States.

Others asserted the existence of "a Communist plot to deplete the brainpower and sap the strength of a generation of American children". Charles Betts, a prominent anti-fluoridationist, charged that fluoridation was "better than using the atom bomb because the atom bomb has to be made, has to be transported to the place it is to be set off while poisonous fluorine has been placed right beside the water supplies by the Americans themselves ready to be dumped into the water mains whenever a Communist desires!" Similarly, a right-wing newsletter, the American Capsule News, claimed that "the Soviet General Staff is very happy about it. Anytime they get ready to strike, and their 5th column takes over, there are tons and tons of this poison 'standing by' municipal and military water systems ready to be poured in within 15 minutes." This controversy had a direct impact on local program during the 1950s and 1960s, where referendums on introducing fluoridation were defeated in over a thousand Florida communities. It was not until as late as the 1990s that fluoridated water was consumed by the majority of the population of the United States.

The communist conspiracy argument declined in influence by the mid-1960s, becoming associated in the public mind with irrational fear and paranoia. It was portrayed in Stanley Kubrick's 1964 film Dr. Strangelove, in which the character General Jack D. Ripper initiates a nuclear war in the hope of thwarting a communist plot to "sap and impurify" the "precious bodily fluids" of the American people with fluoridated water. Another satire appeared in the 1967 movie In Like Flint, in which a character's fear of fluoridation is used to indicate that he is insane. Some anti-fluoridationists claimed that the conspiracy theories were damaging their goals; Frederick Exner, an anti-fluoridation campaigner in the early 1960s, told a conference: "most people are not prepared to believe that fluoridation is a communist plot, and if you say it is, you are successfully ridiculed by the promoters. It is being done, effectively, every day ... some of the people on our side are the fluoridators' 'fifth column'."

Later conspiracy theories

In 1987, Ian E. Stephens authored a self-published booklet, an extract of which was published in the Australian New Age publication Nexus in 1995. In it he claimed he was told by "Charles Elliot Perkins" that: "Repeated doses of infinitesimal amounts of fluoride will in time reduce an individual's power to resist domination by slowly poisoning and narcotising a certain area of the brain and will thus make him submissive to the will of those who wish to govern him ... Both the Germans and the Russians added sodium fluoride to the drinking water of prisoners of war to make them stupid and docile." These statements have been dismissed by reputable Holocaust historians as untrue, but they are regularly repeated to the present day in conspiracy publications and websites.

2006 US NRC report

U.S. opponents of fluoridation were heartened by a 2006 National Research Council report about hazards of water naturally fluoridated to high levels; the report recommended lowering the U.S. maximum limit of 4 mg/L for fluoride in drinking water. The EPA did not act on that recommendation.

Court cases

Ireland

In Ryan v. Attorney General (1965), the Supreme Court of Ireland held that water fluoridation did not infringe the plaintiff's right to bodily integrity. The court found that such a right to bodily integrity did exist, even though it was not explicitly mentioned in the Constitution of Ireland, thus establishing the doctrine of unenumerated rights in Irish constitutional law.

Netherlands

Water was fluoridated in large parts of the Netherlands from 1960 to 1973, at which point the Supreme Court of the Netherlands declared fluoridation of drinking water unauthorized. The Dutch Court decided that authorities had no legal basis for adding chemicals to drinking water if they did not also improve safety. It was also stated as support that consumers cannot choose a different tap water provider. Drinking water has not been fluoridated in any part of the Netherlands since 1973.

United States

See also: Water fluoridation in the United States

Fluoridation has been the subject of many court cases wherein activists have sued municipalities, asserting that their rights to consent to medical treatment and due process are infringed by mandatory water fluoridation. Individuals have sued municipalities for a number of illnesses that they believe were caused by fluoridation of the city's water supply. In most of these cases, the courts have held in favor of cities, finding no or only a tenuous connection between health problems and widespread water fluoridation. To date, no federal appellate court or state court of last resort (i.e., state supreme court) has found water fluoridation to be unlawful.

In September 2024, in Food and Water Watch et al. v. United States Environmental Protection Agency,U.S. Federal Judge Edward Chen ruled that water fluoridation posed an, “unreasonable risk of reduced IQ in children…a risk sufficient to require the EPA to engage with a regulatory response…One thing the EPA cannot do, however, in the face of this Court’s finding, is to ignore that risk.”

See also

References

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