EWG's Tap Water Database — 2019 UPDATE



City of Waynesboro

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.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20120.586 ppm11110.410 ppm - 0.730 ppm
20130.596 ppm13130.460 ppm - 1.14 ppm
20140.604 ppm11110.0600 ppm - 1.08 ppm
20150.549 ppm13130.430 ppm - 0.850 ppm
20160.593 ppm11110.0500 ppm - 1.80 ppm
20170.519 ppm11110.0800 ppm - 0.770 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
2012-01-251201N31-01A0.730 ppm
2012-02-161202H11-01A0.600 ppm
2012-03-131203D93-01A0.710 ppm
2012-04-301205020-01A0.680 ppm
2012-05-101205D27-01A0.620 ppm
2012-06-141206I15-01A0.470 ppm
2012-07-181207H68-01A0.410 ppm
2012-09-201209N31-01A0.540 ppm
2012-10-041210742-01A0.550 ppm
2012-11-141211F77-01A-I0.620 ppm
2012-11-141211G08-01A0.520 ppm
2013-01-30E1211026220.460 ppm
2013-02-20E1211026230.660 ppm
2013-03-27E1211026250.560 ppm
2013-04-26E1211026240.550 ppm
2013-05-28E1211026260.540 ppm
2013-06-27E1211026270.530 ppm
2013-07-29E1211026280.520 ppm
2013-08-22E1211026290.520 ppm
2013-09-26E1211026300.520 ppm
2013-10-29E1211026310.600 ppm
2013-11-19131L97-01A-I0.560 ppm
2013-11-22E1211026330.590 ppm
2013-12-30E1211026321.14 ppm
2014-01-16E1309021860.630 ppm
2014-02-25E1309021870.720 ppm
2014-03-20E1309021880.720 ppm
2014-05-15E1309021890.600 ppm
2014-06-30E1309021901.08 ppm
2014-07-31E1309021970.570 ppm
2014-08-15E1309021960.550 ppm
2014-09-25E1309021950.550 ppm
2014-10-15E1309021940.590 ppm
2014-11-181411K76-04A-I0.0600 ppm
2014-11-25E1309021910.570 ppm
2015-01-30VA010-DCLS0.470 ppm
2015-02-18VA010-DCLS0.540 ppm
2015-03-25VA010-DCLS0.600 ppm
2015-04-23VA010-DCLS0.580 ppm
2015-05-28VA010-DCLS0.600 ppm
2015-06-05VA010-DCLS0.550 ppm
2015-07-22VA010-DCLS0.510 ppm
2015-07-2800281-REI CONSUL0.500 ppm
2015-08-26VA010-DCLS0.530 ppm
2015-09-30VA010-DCLS0.460 ppm
2015-10-28VA010-DCLS0.520 ppm
2015-11-30VA010-DCLS0.850 ppm
2015-12-23VA010-DCLS0.430 ppm
2016-01-29E1410016810.470 ppm
2016-02-25E1602054870.570 ppm
2016-03-29E1509073310.520 ppm
2016-04-06E1509073320.540 ppm
2016-05-31E1509073291.80 ppm
2016-08-2316083325-04A0.0500 ppm
2016-08-30E1509073300.510 ppm
2016-09-16E1509073280.520 ppm
2016-10-07E1509073260.600 ppm
2016-11-08E1509073250.460 ppm
2016-12-05E1509073240.480 ppm
2017-01-20E1509073230.400 ppm
2017-02-28E1509073220.280 ppm
2017-03-31E1509073210.250 ppm
2017-06-30E1509073200.550 ppm
2017-07-21E1509073190.580 ppm
2017-08-07E1509073420.570 ppm
2017-08-2917083995-02A-I0.0800 ppm
2017-09-25E1509073270.710 ppm
2017-10-12E1509073410.770 ppm
2017-11-16E1509073400.760 ppm
2017-12-08E1509073390.760 ppm