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EWG's Tap Water Database — 2019 UPDATE

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Fluoride

South Walton Utility 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.

 

24

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
20140.386 ppm87ND - 0.690 ppm
2015N/A00N/A
2016N/A00N/A
20170.403 ppm16160.0900 ppm - 0.690 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 Result
2014-04-080.330 ppm
2014-04-08ND
2014-04-080.340 ppm
2014-04-080.450 ppm
2014-04-080.320 ppm
2014-04-080.380 ppm
2014-04-080.690 ppm
2014-04-080.580 ppm
2017-01-110.340 ppm
2017-01-110.370 ppm
2017-01-110.320 ppm
2017-01-110.470 ppm
2017-01-110.0900 ppm
2017-01-110.610 ppm
2017-01-110.690 ppm
2017-01-110.330 ppm
2017-01-110.370 ppm
2017-01-110.0900 ppm
2017-01-110.610 ppm
2017-01-110.330 ppm
2017-01-110.470 ppm
2017-01-110.340 ppm
2017-01-110.320 ppm
2017-01-110.690 ppm