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EWG's Tap Water Database — 2019 UPDATE

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Fluoride

Avon Water Company

Fluoride occurs naturally in surface and groundwater and is also added to drinking water by many water systems. Read More.

Fluoride has been promoted as a chemical that reduces dental cavities. Yet it is now well-established that fluoride primarily exerts its protective effects through topical mechanisms, such as sodium fluoride in toothpaste and mouthwash. In contrast, long-term ingestion of fluoride in water increases dental fluorosis, which includes mottling, pitting and weakening of the teeth. EPA's maximum legal limit is set at 4 parts per million (ppm) to prevent skeletal fluorosis, a condition where bones become brittle and more susceptible to fractures, although these effects may occur at lower doses.

Even fluoride levels of 0.7 ppm, the amount of fluoride in drinking water recommended by the U.S. Public Health Service, can result in too much fluoride for bottle-fed babies. EWG recommends that caregivers mix baby formula with fluoride-free water. The National Toxicology Program is investigating the potential for low doses of fluoride to alter thyroid function and childhood brain development.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND80ND
2015N/A00N/A
2016N/A00N/A
2017ND80ND

ppm = parts per million

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 4 ppm

ppm = parts per million

All test results

Date Lab ID Result
2014-01-16E402153-8IOC1ND
2014-02-04E402153-7IOC1ND
2014-02-04E402153-6IOC1ND
2014-02-04E402153-5IOC1ND
2014-02-04E402153-4IOC1ND
2014-02-04E402153-3IOC1ND
2014-02-04E402153-2IOC1ND
2014-02-04E402153-1IOC1ND
2017-02-24E702M07-8IOC1ND
2017-02-24E702M07-7IOC1ND
2017-02-24E702M07-6IOC1ND
2017-02-24E702M07-5IOC1ND
2017-02-24E702M07-4IOC1ND
2017-02-24E702M07-3IOC1ND
2017-02-24E702M07-2IOC1ND
2017-03-20D7C1331-01IOCND