Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Fluoride

Wellborn SUD

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.15 ppm330.150 ppm - 1.99 ppm
20130.291 ppm330.180 ppm - 0.367 ppm
20140.205 ppm220.1000 ppm - 0.310 ppm
20151.04 ppm220.110 ppm - 1.97 ppm
20160.243 ppm32ND - 0.370 ppm
20170.270 ppm220.260 ppm - 0.280 ppm

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
2012-02-01AB799210.150 ppm
2012-06-18AB930601.99 ppm
2012-09-12AC007261.32 ppm
2013-02-0613022280030.180 ppm
2013-12-12Q13176240180.367 ppm
2013-12-12Q13176240150.326 ppm
2014-02-13AC428610.1000 ppm
2014-02-13AC428600.310 ppm
2015-03-24AC858020.110 ppm
2015-03-24AC858011.97 ppm
2016-03-09AD27767ND
2016-03-09AD277680.370 ppm
2016-03-09AD277830.360 ppm
2017-03-07AD736040.280 ppm
2017-03-07AD735990.260 ppm