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EWG's Tap Water Database — 2019 UPDATE

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Fluoride

City of Deland

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.

 

30

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
20140.727 ppm10100.200 ppm - 2.90 ppm
2015N/A00N/A
2016N/A00N/A
20170.528 ppm20200.360 ppm - 0.660 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
2014-05-290.660 ppm
2014-05-290.520 ppm
2014-05-290.390 ppm
2014-05-290.640 ppm
2014-05-290.210 ppm
2014-05-290.200 ppm
2014-05-290.700 ppm
2014-05-290.450 ppm
2014-05-292.90 ppm
2014-05-290.600 ppm
2017-05-250.360 ppm
2017-05-250.480 ppm
2017-05-250.660 ppm
2017-05-250.610 ppm
2017-05-250.600 ppm
2017-05-250.480 ppm
2017-05-250.590 ppm
2017-05-250.490 ppm
2017-05-250.520 ppm
2017-05-250.600 ppm
2017-05-250.660 ppm
2017-05-250.590 ppm
2017-05-250.610 ppm
2017-05-250.490 ppm
2017-05-250.520 ppm
2017-05-250.360 ppm
2017-05-250.480 ppm
2017-05-250.480 ppm
2017-06-160.490 ppm
2017-06-160.490 ppm