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EWG's Tap Water Database — 2019 UPDATE

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Fluoride

Joint Municipal WSC

NOTE: Joint Municipal WSC purchases water from City of West Columbia which is required to test for fluoride. Sample information shown below was taken by City of West Columbia.

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.765 ppm220.630 ppm - 0.900 ppm
20131.16 ppm220.720 ppm - 1.60 ppm
20140.655 ppm220.610 ppm - 0.700 ppm
20150.730 ppm220.720 ppm - 0.740 ppm
20160.665 ppm220.600 ppm - 0.730 ppm
20170.680 ppm220.530 ppm - 0.830 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

NOTE: Joint Municipal WSC purchases water from City of West Columbia which is required to test for fluoride. Sample information shown below was taken by City of West Columbia.

Date Lab ID Result
2012-02-06AD023050.900 ppm
2012-02-06AD023060.630 ppm
2013-02-06AD193961.60 ppm
2013-02-06AD193970.720 ppm
2014-01-22AD347770.610 ppm
2014-01-22AD347780.700 ppm
2015-01-21AD504940.720 ppm
2015-01-21AD504930.740 ppm
2016-02-03AD700880.730 ppm
2016-02-03AD700890.600 ppm
2017-01-18AD884490.830 ppm
2017-03-07AD907160.530 ppm