Fluoride
Kimzey Regional Water District
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
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.665 ppm | 26 | 26 | 0.500 ppm - 0.810 ppm |
| 2015 | 0.773 ppm | 26 | 26 | 0.570 ppm - 1.000 ppm |
| 2016 | 0.769 ppm | 27 | 27 | 0.580 ppm - 0.940 ppm |
| 2017 | 0.758 ppm | 26 | 26 | 0.470 ppm - 1.16 ppm |
| 2018 | 0.792 ppm | 26 | 26 | 0.540 ppm - 0.960 ppm |
| 2019 | 0.792 ppm | 27 | 27 | 0.490 ppm - 1.12 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 |
|---|---|---|
| 2014-01-15 | 140220009 | 0.530 ppm |
| 2014-01-16 | 140220014 | 0.570 ppm |
| 2014-02-12 | 140550008 | 0.580 ppm |
| 2014-02-19 | 140550033 | 0.580 ppm |
| 2014-03-17 | 140790013 | 0.520 ppm |
| 2014-03-17 | 140900003 | 0.660 ppm |
| 2014-03-24 | 140900042 | 0.800 ppm |
| 2014-04-10 | 141040030 | 0.610 ppm |
| 2014-04-15 | 141110010 | 0.720 ppm |
| 2014-05-15 | 141390024 | 0.770 ppm |
| 2014-05-22 | 141470027 | 0.650 ppm |
| 2014-06-18 | 141810013 | 0.700 ppm |
| 2014-06-18 | 141810005 | 0.630 ppm |
| 2014-07-09 | 141950016 | 0.780 ppm |
| 2014-07-15 | 142020006 | 0.720 ppm |
| 2014-08-18 | 142370001 | 0.640 ppm |
| 2014-08-19 | 142370019 | 0.690 ppm |
| 2014-09-04 | 142510017 | 0.500 ppm |
| 2014-09-25 | 142790009 | 0.810 ppm |
| 2014-10-22 | Y143000030 | 0.810 ppm |
| 2014-10-24 | Y143070001 | 0.800 ppm |
| 2014-11-17 | Y143240005 | 0.750 ppm |
| 2014-11-17 | Y143290002 | 0.590 ppm |
| 2014-11-20 | Y143290019 | 0.730 ppm |
| 2014-12-16 | Y143520018 | 0.630 ppm |
| 2014-12-23 | Y150130007 | 0.530 ppm |
| 2015-01-20 | Y150260002 | 0.580 ppm |
| 2015-01-26 | Y150290003 | 0.600 ppm |
| 2015-01-26 | Y150330010 | 0.610 ppm |
| 2015-02-24 | Y150690001 | 0.610 ppm |
| 2015-02-26 | Y150610022 | 0.830 ppm |
| 2015-03-16 | Y150820004 | 0.600 ppm |
| 2015-03-17 | Y150820013 | 0.760 ppm |
| 2015-04-14 | Y151140004 | 0.830 ppm |
| 2015-04-15 | Y151140010 | 0.730 ppm |
| 2015-05-19 | Y151420025 | 0.880 ppm |
| 2015-05-20 | Y151420020 | 0.570 ppm |
| 2015-06-15 | Y151670010 | 0.840 ppm |
| 2015-06-16 | Y151740009 | 0.910 ppm |
| 2015-07-13 | Y151950021 | 0.840 ppm |
| 2015-07-14 | Y152020017 | 0.940 ppm |
| 2015-08-17 | Y152360005 | 1.000 ppm |
| 2015-08-20 | Y152360029 | 0.860 ppm |
| 2015-09-14 | Y152580044 | 0.800 ppm |
| 2015-09-16 | Y152650006 | 0.890 ppm |
| 2015-10-07 | Y152820008 | 0.760 ppm |
| 2015-10-14 | Y152890067 | 0.770 ppm |
| 2015-10-19 | Y152990028 | 0.790 ppm |
| 2015-11-10 | Y153200027 | 0.860 ppm |
| 2015-11-18 | Y153270024 | 0.800 ppm |
| 2015-12-15 | Y153520013 | 0.670 ppm |
| 2015-12-21 | Y153570012 | 0.760 ppm |
| 2016-01-07 | Y160080081 | 0.640 ppm |
| 2016-01-12 | Y160200001 | 0.670 ppm |
| 2016-01-25 | Y160280004 | 0.630 ppm |
| 2016-01-25 | Y160320021 | 0.580 ppm |
| 2016-02-09 | Y160470015 | 0.810 ppm |
| 2016-02-25 | Y160610018 | 0.630 ppm |
| 2016-03-07 | Y160680011 | 0.760 ppm |
| 2016-03-15 | Y160810027 | 0.700 ppm |
| 2016-04-18 | Y161160012 | 0.750 ppm |
| 2016-04-27 | Y161240016 | 0.830 ppm |
| 2016-05-11 | Y161380035 | 0.830 ppm |
| 2016-05-25 | Y161580001 | 0.690 ppm |
| 2016-06-16 | Y161790032 | 0.690 ppm |
| 2016-06-21 | Y161870007 | 0.880 ppm |
| 2016-07-06 | Y161930010 | 0.870 ppm |
| 2016-07-21 | Y162070026 | 0.760 ppm |
| 2016-08-17 | Y162350048 | 0.730 ppm |
| 2016-08-18 | Y162350047 | 0.940 ppm |
| 2016-09-15 | Y162640001 | 0.830 ppm |
| 2016-09-21 | Y162700019 | 0.760 ppm |
| 2016-10-17 | Y162930012 | 0.920 ppm |
| 2016-10-18 | Y162930002 | 0.850 ppm |
| 2016-11-08 | Y163140019 | 0.820 ppm |
| 2016-11-15 | Y163210018 | 0.740 ppm |
| 2016-11-23 | Y163280030 | 0.780 ppm |
| 2016-12-13 | Y163500016 | 0.850 ppm |
| 2016-12-19 | Y163550014 | 0.820 ppm |
| 2017-01-03 | Y170050019 | 0.780 ppm |
| 2017-01-17 | Y170200001 | 0.710 ppm |
| 2017-01-23 | Y170250003 | 0.720 ppm |
| 2017-02-07 | Y170400038 | 0.890 ppm |
| 2017-02-15 | Y170480017 | 0.700 ppm |
| 2017-03-16 | Y170790018 | 0.720 ppm |
| 2017-03-21 | Y170860029 | 0.810 ppm |
| 2017-04-17 | Y171140009 | 0.580 ppm |
| 2017-04-18 | Y171140017 | 0.760 ppm |
| 2017-05-09 | Y171350040 | 0.740 ppm |
| 2017-05-16 | Y171420009 | 0.710 ppm |
| 2017-06-13 | Y171700024 | 0.470 ppm |
| 2017-06-19 | Y171770017 | 0.710 ppm |
| 2017-07-10 | Y171980023 | 0.500 ppm |
| 2017-07-19 | Y172050037 | 0.850 ppm |
| 2017-08-07 | Y172260017 | 0.700 ppm |
| 2017-08-15 | Y172330014 | 0.900 ppm |
| 2017-09-18 | Y172680018 | 0.780 ppm |
| 2017-09-18 | Y172680005 | 0.880 ppm |
| 2017-10-02 | Y172780007 | 0.770 ppm |
| 2017-10-16 | Y172960013 | 1.16 ppm |
| 2017-10-16 | Y172960007 | 0.790 ppm |
| 2017-11-14 | Y173240012 | 0.830 ppm |
| 2017-11-15 | Y173240041 | 0.760 ppm |
| 2017-12-11 | Y173540051 | 0.780 ppm |
| 2017-12-13 | Y173540077 | 0.700 ppm |
| 2018-01-22 | Y180240025 | 0.620 ppm |
| 2018-01-23 | Y180250012 | 0.910 ppm |
| 2018-01-24 | Y180250004 | 0.750 ppm |
| 2018-02-20 | Y180530035 | 0.740 ppm |
| 2018-02-21 | Y180530037 | 0.700 ppm |
| 2018-03-06 | Y180660026 | 0.870 ppm |
| 2018-03-20 | Y180850013 | 0.730 ppm |
| 2018-04-17 | Y181130010 | 0.790 ppm |
| 2018-04-17 | Y181130012 | 0.920 ppm |
| 2018-05-08 | Y181340025 | 0.820 ppm |
| 2018-05-21 | Y181490007 | 0.780 ppm |
| 2018-06-19 | Y181760052 | 0.830 ppm |
| 2018-06-20 | Y181760064 | 0.760 ppm |
| 2018-07-23 | Y182050035 | 0.750 ppm |
| 2018-07-25 | Y182120015 | 0.860 ppm |
| 2018-08-14 | Y182320006 | 0.540 ppm |
| 2018-08-19 | Y182400001 | 0.840 ppm |
| 2018-09-18 | Y182670002 | 0.740 ppm |
| 2018-09-26 | Y182750014 | 0.900 ppm |
| 2018-10-03 | Y182770009 | 0.740 ppm |
| 2018-10-16 | Y182950007 | 0.770 ppm |
| 2018-10-17 | Y182950018 | 0.840 ppm |
| 2018-11-15 | Y183240034 | 0.960 ppm |
| 2018-11-19 | Y183300001 | 0.780 ppm |
| 2018-12-18 | Y183600011 | 0.820 ppm |
| 2018-12-19 | Y183600037 | 0.820 ppm |
| 2019-01-08 | Y190100002 | 0.520 ppm |
| 2019-01-22 | Y190280017 | 0.730 ppm |
| 2019-01-28 | Y190350008 | 0.850 ppm |
| 2019-02-19 | Y190560007 | 0.760 ppm |
| 2019-02-19 | Y190560019 | 0.660 ppm |
| 2019-03-18 | Y190840002 | 0.690 ppm |
| 2019-03-19 | Y190840008 | 0.700 ppm |
| 2019-04-16 | Y191120010 | 0.780 ppm |
| 2019-04-25 | Y191190013 | 0.650 ppm |
| 2019-05-21 | Y191530026 | 0.750 ppm |
| 2019-05-21 | Y191530020 | 0.660 ppm |
| 2019-06-17 | Y191750006 | 0.920 ppm |
| 2019-06-24 | Y191820005 | 0.960 ppm |
| 2019-07-22 | Y192100033 | 0.970 ppm |
| 2019-07-25 | Y192100007 | 0.890 ppm |
| 2019-08-16 | Y192320040 | 0.810 ppm |
| 2019-08-26 | Y192530008 | 0.780 ppm |
| 2019-09-12 | Y192590021 | 0.930 ppm |
| 2019-09-18 | Y192660003 | 0.820 ppm |
| 2019-10-02 | Y192880028 | 1.12 ppm |
| 2019-10-03 | Y192770003 | 0.760 ppm |
| 2019-10-21 | Y193010001 | 0.490 ppm |
| 2019-11-13 | Y193220024 | 0.840 ppm |
| 2019-11-18 | Y193250094 | 0.830 ppm |
| 2019-11-18 | Y193290010 | 0.830 ppm |
| 2019-12-17 | Y193540021 | 0.870 ppm |
| 2019-12-18 | Y193540030 | 0.820 ppm |