Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Fluoride

City of Homestead

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.

 

422

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.484 ppm84840.120 ppm - 0.910 ppm
20130.460 ppm78780.0850 ppm - 0.930 ppm
20140.352 ppm73730.130 ppm - 0.550 ppm
20150.359 ppm48480.150 ppm - 0.580 ppm
20160.320 ppm65650.110 ppm - 0.730 ppm
20170.452 ppm7473ND - 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 Result
2012-01-100.910 ppm
2012-01-100.790 ppm
2012-01-100.660 ppm
2012-01-100.160 ppm
2012-01-100.730 ppm
2012-01-310.130 ppm
2012-01-310.140 ppm
2012-01-310.720 ppm
2012-01-310.680 ppm
2012-01-310.710 ppm
2012-01-310.660 ppm
2012-01-310.150 ppm
2012-02-140.160 ppm
2012-02-140.170 ppm
2012-02-140.730 ppm
2012-02-140.680 ppm
2012-02-140.770 ppm
2012-02-140.760 ppm
2012-03-280.140 ppm
2012-03-280.130 ppm
2012-03-280.670 ppm
2012-03-280.670 ppm
2012-03-280.690 ppm
2012-03-280.680 ppm
2012-04-030.150 ppm
2012-04-030.150 ppm
2012-04-030.640 ppm
2012-04-030.590 ppm
2012-04-030.720 ppm
2012-04-030.680 ppm
2012-05-010.170 ppm
2012-05-010.150 ppm
2012-05-010.620 ppm
2012-05-010.610 ppm
2012-05-010.690 ppm
2012-05-010.670 ppm
2012-06-050.150 ppm
2012-06-050.140 ppm
2012-06-050.610 ppm
2012-06-050.570 ppm
2012-06-050.690 ppm
2012-06-050.660 ppm
2012-07-030.610 ppm
2012-07-030.700 ppm
2012-07-030.590 ppm
2012-07-030.130 ppm
2012-07-030.620 ppm
2012-07-030.120 ppm
2012-08-010.140 ppm
2012-08-010.140 ppm
2012-08-010.560 ppm
2012-08-010.580 ppm
2012-08-010.650 ppm
2012-08-010.660 ppm
2012-08-010.140 ppm
2012-08-010.140 ppm
2012-08-010.690 ppm
2012-08-010.670 ppm
2012-08-010.680 ppm
2012-08-010.650 ppm
2012-09-110.140 ppm
2012-09-110.150 ppm
2012-09-110.650 ppm
2012-09-110.580 ppm
2012-09-110.740 ppm
2012-09-110.700 ppm
2012-10-020.130 ppm
2012-10-020.130 ppm
2012-10-020.250 ppm
2012-10-020.510 ppm
2012-10-020.550 ppm
2012-10-020.450 ppm
2012-11-060.710 ppm
2012-11-060.630 ppm
2012-11-060.590 ppm
2012-11-060.660 ppm
2012-11-060.140 ppm
2012-11-060.150 ppm
2012-12-190.130 ppm
2012-12-190.680 ppm
2012-12-190.130 ppm
2012-12-190.680 ppm
2012-12-210.690 ppm
2012-12-210.650 ppm
2013-01-070.750 ppm
2013-01-070.730 ppm
2013-01-070.660 ppm
2013-01-070.610 ppm
2013-01-070.170 ppm
2013-01-070.160 ppm
2013-02-200.670 ppm
2013-02-200.660 ppm
2013-02-200.650 ppm
2013-02-200.620 ppm
2013-02-200.140 ppm
2013-02-200.140 ppm
2013-03-050.690 ppm
2013-03-050.690 ppm
2013-03-050.610 ppm
2013-03-050.580 ppm
2013-03-050.160 ppm
2013-03-050.150 ppm
2013-04-020.740 ppm
2013-04-020.720 ppm
2013-04-020.640 ppm
2013-04-020.580 ppm
2013-04-020.160 ppm
2013-04-020.150 ppm
2013-05-150.680 ppm
2013-05-150.670 ppm
2013-05-150.660 ppm
2013-05-150.660 ppm
2013-05-150.140 ppm
2013-05-150.130 ppm
2013-06-050.730 ppm
2013-06-050.720 ppm
2013-06-050.700 ppm
2013-06-050.650 ppm
2013-06-050.170 ppm
2013-06-070.170 ppm
2013-07-260.510 ppm
2013-07-260.490 ppm
2013-07-260.480 ppm
2013-07-260.460 ppm
2013-07-260.120 ppm
2013-07-260.110 ppm
2013-08-060.790 ppm
2013-08-060.710 ppm
2013-08-060.700 ppm
2013-08-060.660 ppm
2013-08-060.170 ppm
2013-08-060.170 ppm
2013-09-180.420 ppm
2013-09-180.420 ppm
2013-09-180.400 ppm
2013-09-180.380 ppm
2013-09-180.0890 ppm
2013-09-180.0850 ppm
2013-10-020.930 ppm
2013-10-020.850 ppm
2013-10-020.680 ppm
2013-10-020.570 ppm
2013-10-020.120 ppm
2013-10-090.160 ppm
2013-10-300.670 ppm
2013-10-300.650 ppm
2013-10-300.630 ppm
2013-10-300.550 ppm
2013-10-300.140 ppm
2013-10-300.130 ppm
2013-11-050.660 ppm
2013-11-050.630 ppm
2013-11-050.570 ppm
2013-11-050.490 ppm
2013-11-050.170 ppm
2013-11-050.160 ppm
2013-12-030.460 ppm
2013-12-030.440 ppm
2013-12-030.420 ppm
2013-12-030.400 ppm
2013-12-030.170 ppm
2013-12-030.160 ppm
2014-01-220.340 ppm
2014-01-220.420 ppm
2014-01-220.390 ppm
2014-01-220.320 ppm
2014-01-220.380 ppm
2014-01-220.340 ppm
2014-02-040.410 ppm
2014-02-040.430 ppm
2014-02-040.420 ppm
2014-02-040.410 ppm
2014-02-040.180 ppm
2014-02-040.170 ppm
2014-03-040.490 ppm
2014-03-040.470 ppm
2014-03-040.430 ppm
2014-03-040.430 ppm
2014-03-040.180 ppm
2014-03-040.170 ppm
2014-04-010.470 ppm
2014-04-010.480 ppm
2014-04-010.490 ppm
2014-04-010.440 ppm
2014-04-010.180 ppm
2014-04-010.170 ppm
2014-05-060.170 ppm
2014-05-060.460 ppm
2014-05-060.540 ppm
2014-05-060.430 ppm
2014-05-060.170 ppm
2014-05-060.170 ppm
2014-06-040.480 ppm
2014-06-040.440 ppm
2014-06-040.490 ppm
2014-06-040.420 ppm
2014-06-040.160 ppm
2014-06-040.150 ppm
2014-07-230.410 ppm
2014-07-230.400 ppm
2014-07-230.390 ppm
2014-07-230.130 ppm
2014-07-230.160 ppm
2014-07-230.400 ppm
2014-08-050.170 ppm
2014-08-050.390 ppm
2014-08-050.170 ppm
2014-08-050.470 ppm
2014-08-050.180 ppm
2014-08-050.550 ppm
2014-09-020.420 ppm
2014-09-020.160 ppm
2014-09-020.160 ppm
2014-09-020.460 ppm
2014-09-020.440 ppm
2014-09-020.210 ppm
2014-10-070.450 ppm
2014-10-070.170 ppm
2014-10-070.470 ppm
2014-10-070.470 ppm
2014-10-070.490 ppm
2014-10-070.170 ppm
2014-10-220.503 ppm
2014-10-220.478 ppm
2014-11-190.440 ppm
2014-11-190.160 ppm
2014-11-190.440 ppm
2014-11-190.170 ppm
2014-11-190.450 ppm
2014-11-190.460 ppm
2014-12-090.170 ppm
2014-12-090.410 ppm
2014-12-090.440 ppm
2014-12-090.510 ppm
2014-12-090.520 ppm
2015-01-150.410 ppm
2015-01-150.450 ppm
2015-01-150.170 ppm
2015-01-150.440 ppm
2015-01-150.230 ppm
2015-01-150.170 ppm
2015-02-030.150 ppm
2015-02-030.460 ppm
2015-02-030.150 ppm
2015-02-030.470 ppm
2015-02-030.410 ppm
2015-02-030.480 ppm
2015-03-040.150 ppm
2015-03-040.160 ppm
2015-03-040.480 ppm
2015-03-040.480 ppm
2015-03-040.440 ppm
2015-03-040.400 ppm
2015-04-070.150 ppm
2015-04-070.470 ppm
2015-04-070.470 ppm
2015-04-070.160 ppm
2015-04-070.460 ppm
2015-04-070.440 ppm
2015-05-180.460 ppm
2015-05-180.440 ppm
2015-05-180.150 ppm
2015-05-180.430 ppm
2015-05-180.470 ppm
2015-05-280.150 ppm
2015-06-010.470 ppm
2015-06-010.430 ppm
2015-06-010.150 ppm
2015-06-010.150 ppm
2015-06-010.440 ppm
2015-06-010.430 ppm
2015-07-070.160 ppm
2015-07-070.150 ppm
2015-07-070.490 ppm
2015-07-070.470 ppm
2015-07-070.440 ppm
2015-07-070.490 ppm
2015-08-040.560 ppm
2015-08-040.570 ppm
2015-08-040.170 ppm
2015-08-040.180 ppm
2015-08-040.580 ppm
2015-08-040.530 ppm
2016-02-080.150 ppm
2016-02-080.160 ppm
2016-02-080.480 ppm
2016-02-080.450 ppm
2016-02-080.450 ppm
2016-02-080.480 ppm
2016-03-090.430 ppm
2016-03-090.410 ppm
2016-03-090.430 ppm
2016-03-090.600 ppm
2016-03-090.110 ppm
2016-03-090.120 ppm
2016-04-200.460 ppm
2016-04-200.450 ppm
2016-04-200.600 ppm
2016-04-200.360 ppm
2016-04-200.190 ppm
2016-04-200.180 ppm
2016-05-050.300 ppm
2016-05-050.730 ppm
2016-05-050.180 ppm
2016-05-050.120 ppm
2016-05-050.130 ppm
2016-05-050.380 ppm
2016-06-140.130 ppm
2016-06-140.140 ppm
2016-06-140.640 ppm
2016-06-140.180 ppm
2016-06-140.300 ppm
2016-06-140.200 ppm
2016-07-050.450 ppm
2016-07-050.120 ppm
2016-07-050.710 ppm
2016-07-050.430 ppm
2016-07-050.130 ppm
2016-07-050.460 ppm
2016-08-090.470 ppm
2016-08-090.460 ppm
2016-08-090.350 ppm
2016-08-090.110 ppm
2016-08-090.130 ppm
2016-09-070.200 ppm
2016-09-070.120 ppm
2016-09-070.230 ppm
2016-09-070.360 ppm
2016-09-070.130 ppm
2016-09-070.200 ppm
2016-10-100.130 ppm
2016-10-100.130 ppm
2016-10-100.420 ppm
2016-10-100.440 ppm
2016-10-100.450 ppm
2016-10-100.490 ppm
2016-11-010.110 ppm
2016-11-010.120 ppm
2016-11-010.390 ppm
2016-11-010.400 ppm
2016-11-010.390 ppm
2016-11-010.430 ppm
2016-12-070.470 ppm
2016-12-070.440 ppm
2016-12-070.340 ppm
2016-12-070.430 ppm
2016-12-090.140 ppm
2016-12-140.110 ppm
2017-01-040.140 ppm
2017-01-040.120 ppm
2017-01-040.480 ppm
2017-01-040.460 ppm
2017-01-040.460 ppm
2017-01-040.500 ppm
2017-02-270.490 ppm
2017-02-270.150 ppm
2017-02-270.140 ppm
2017-02-270.450 ppm
2017-02-270.470 ppm
2017-02-270.470 ppm
2017-03-170.120 ppm
2017-03-170.550 ppm
2017-03-170.640 ppm
2017-03-170.600 ppm
2017-03-170.590 ppm
2017-03-170.140 ppm
2017-04-070.140 ppm
2017-04-070.140 ppm
2017-04-070.610 ppm
2017-04-070.600 ppm
2017-04-070.680 ppm
2017-04-070.590 ppm
2017-05-050.600 ppm
2017-05-050.580 ppm
2017-05-050.620 ppm
2017-05-050.600 ppm
2017-05-050.130 ppm
2017-05-050.140 ppm
2017-05-170.584 ppm
2017-05-170.585 ppm
2017-05-170.585 ppm
2017-05-170.584 ppm
2017-06-130.110 ppm
2017-06-130.620 ppm
2017-06-130.620 ppm
2017-06-130.110 ppm
2017-06-16ND
2017-07-140.610 ppm
2017-07-140.660 ppm
2017-07-140.630 ppm
2017-07-140.120 ppm
2017-07-140.120 ppm
2017-07-140.630 ppm
2017-08-040.110 ppm
2017-08-040.120 ppm
2017-08-040.690 ppm
2017-08-040.670 ppm
2017-08-040.690 ppm
2017-08-040.630 ppm
2017-09-140.140 ppm
2017-09-140.150 ppm
2017-09-140.660 ppm
2017-09-220.690 ppm
2017-09-220.630 ppm
2017-10-130.150 ppm
2017-10-130.150 ppm
2017-10-130.720 ppm
2017-10-130.740 ppm
2017-10-130.770 ppm
2017-10-130.670 ppm
2017-11-090.150 ppm
2017-11-090.130 ppm
2017-11-090.710 ppm
2017-11-090.720 ppm
2017-11-090.660 ppm
2017-11-090.710 ppm
2017-12-150.690 ppm
2017-12-150.700 ppm
2017-12-150.670 ppm
2017-12-150.680 ppm
2017-12-150.150 ppm
2017-12-150.140 ppm