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EWG's Tap Water Database — 2019 UPDATE

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Fluoride

Baton Rouge Water Company

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.

 

342

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.125 ppm880.1000 ppm - 0.200 ppm
20130.176 ppm58580.1000 ppm - 0.300 ppm
20140.221 ppm68680.1000 ppm - 0.600 ppm
20150.382 ppm40400.170 ppm - 0.750 ppm
20160.208 ppm94940.1000 ppm - 0.400 ppm
20170.222 ppm74740.1000 ppm - 0.700 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
2012-07-09AD672930.1000 ppm
2012-07-09AD672980.1000 ppm
2012-07-09AD672930.1000 ppm
2012-07-09AD672980.1000 ppm
2012-10-22AD724140.200 ppm
2012-10-22AD724140.200 ppm
2012-11-19AD733420.1000 ppm
2012-11-19AD733420.1000 ppm
2013-01-14AD746990.1000 ppm
2013-01-14AD747040.1000 ppm
2013-01-14AD747090.200 ppm
2013-01-14AD746990.1000 ppm
2013-01-14AD747040.1000 ppm
2013-01-14AD747090.200 ppm
2013-01-28AD750010.1000 ppm
2013-01-28AD750060.1000 ppm
2013-01-28AD750110.1000 ppm
2013-01-28AD750160.1000 ppm
2013-01-28AD750210.200 ppm
2013-01-28AD750010.1000 ppm
2013-01-28AD750060.1000 ppm
2013-01-28AD750110.1000 ppm
2013-01-28AD750160.1000 ppm
2013-01-28AD750210.200 ppm
2013-02-04AD752590.200 ppm
2013-02-04AD752640.200 ppm
2013-02-04AD752690.1000 ppm
2013-02-04AD752740.200 ppm
2013-02-04AD752790.200 ppm
2013-02-04AD752590.200 ppm
2013-02-04AD752640.200 ppm
2013-02-04AD752690.1000 ppm
2013-02-04AD752740.200 ppm
2013-02-04AD752790.200 ppm
2013-03-11AD759190.1000 ppm
2013-03-11AD759240.200 ppm
2013-03-11AD759290.200 ppm
2013-03-11AD759340.1000 ppm
2013-03-11AD759390.200 ppm
2013-03-11AD759190.1000 ppm
2013-03-11AD759240.200 ppm
2013-03-11AD759290.200 ppm
2013-03-11AD759340.1000 ppm
2013-03-11AD759390.200 ppm
2013-04-01AD764900.300 ppm
2013-04-01AD764950.200 ppm
2013-04-01AD765000.300 ppm
2013-04-01AD764900.300 ppm
2013-04-01AD764950.200 ppm
2013-04-01AD765000.300 ppm
2013-04-08AD766990.1000 ppm
2013-04-08AD766990.1000 ppm
2013-04-15AD769120.200 ppm
2013-04-15AD769170.200 ppm
2013-04-15AD769220.300 ppm
2013-04-15AD769270.200 ppm
2013-04-15AD769320.200 ppm
2013-04-15AD769120.200 ppm
2013-04-15AD769170.200 ppm
2013-04-15AD769220.300 ppm
2013-04-15AD769270.200 ppm
2013-04-15AD769320.200 ppm
2013-04-29AD772280.200 ppm
2013-04-29AD772280.200 ppm
2013-09-09AD836200.200 ppm
2013-09-09AD836200.200 ppm
2014-01-13AD882530.200 ppm
2014-01-13AD882580.200 ppm
2014-01-13AD882630.400 ppm
2014-01-13AD882680.200 ppm
2014-01-13AD882730.300 ppm
2014-01-13AD882530.200 ppm
2014-01-13AD882580.200 ppm
2014-01-13AD882630.400 ppm
2014-01-13AD882680.200 ppm
2014-01-13AD882730.300 ppm
2014-05-05AD911050.200 ppm
2014-05-05AD911100.200 ppm
2014-05-05AD911150.200 ppm
2014-05-05AD911200.200 ppm
2014-05-05AD911250.200 ppm
2014-05-05AD911050.200 ppm
2014-05-05AD911100.200 ppm
2014-05-05AD911150.200 ppm
2014-05-05AD911200.200 ppm
2014-05-05AD911250.200 ppm
2014-05-12AD914080.1000 ppm
2014-05-12AD914130.1000 ppm
2014-05-12AD914180.200 ppm
2014-05-12AD914230.200 ppm
2014-05-12AD914280.200 ppm
2014-05-12AD914080.1000 ppm
2014-05-12AD914130.1000 ppm
2014-05-12AD914180.200 ppm
2014-05-12AD914230.200 ppm
2014-05-12AD914280.200 ppm
2014-05-19AD916250.200 ppm
2014-05-19AD916300.200 ppm
2014-05-19AD916350.200 ppm
2014-05-19AD916400.200 ppm
2014-05-19AD916450.200 ppm
2014-05-19AD916250.200 ppm
2014-05-19AD916300.200 ppm
2014-05-19AD916350.200 ppm
2014-05-19AD916400.200 ppm
2014-05-19AD916450.200 ppm
2014-06-09AD920650.200 ppm
2014-06-09AD920650.200 ppm
2014-07-14AD934380.300 ppm
2014-07-14AD934430.300 ppm
2014-07-14AD934480.600 ppm
2014-07-14AD934530.200 ppm
2014-07-14AD934380.300 ppm
2014-07-14AD934430.300 ppm
2014-07-14AD934480.600 ppm
2014-07-14AD934530.200 ppm
2014-07-21AD939830.1000 ppm
2014-07-21AD939880.200 ppm
2014-07-21AD939930.200 ppm
2014-07-21AD939980.200 ppm
2014-07-21AD940030.300 ppm
2014-07-21AD939830.1000 ppm
2014-07-21AD939880.200 ppm
2014-07-21AD939930.200 ppm
2014-07-21AD939980.200 ppm
2014-07-21AD940030.300 ppm
2014-08-11AD951390.200 ppm
2014-08-11AD951440.200 ppm
2014-08-11AD951490.200 ppm
2014-08-11AD951590.200 ppm
2014-08-11AD951390.200 ppm
2014-08-11AD951440.200 ppm
2014-08-11AD951490.200 ppm
2014-08-11AD951590.200 ppm
2015-03-30351818450050.210 ppm
2015-03-30351818450050.210 ppm
2015-07-06351964550040.170 ppm
2015-07-06351964550050.750 ppm
2015-07-06351964550040.170 ppm
2015-07-06351964550050.750 ppm
2015-08-03352009970010.630 ppm
2015-08-03352009970020.620 ppm
2015-08-03352009970030.670 ppm
2015-08-03352009970040.530 ppm
2015-08-03352009970050.210 ppm
2015-08-03352009970010.630 ppm
2015-08-03352009970020.620 ppm
2015-08-03352009970030.670 ppm
2015-08-03352009970040.530 ppm
2015-08-03352009970050.210 ppm
2015-08-17352034380010.270 ppm
2015-08-17352034380020.180 ppm
2015-08-17352034380010.270 ppm
2015-08-17352034380020.180 ppm
2015-08-31352059740040.320 ppm
2015-08-31352059740050.440 ppm
2015-08-31352059740040.320 ppm
2015-08-31352059740050.440 ppm
2015-11-02352151100010.230 ppm
2015-11-02352151100020.220 ppm
2015-11-02352151100030.270 ppm
2015-11-02352151100010.230 ppm
2015-11-02352151100020.220 ppm
2015-11-02352151100030.270 ppm
2015-11-30352190660010.500 ppm
2015-11-30352190660020.740 ppm
2015-11-30352190660030.190 ppm
2015-11-30352190660040.240 ppm
2015-11-30352190660050.240 ppm
2015-11-30352190660010.500 ppm
2015-11-30352190660020.740 ppm
2015-11-30352190660030.190 ppm
2015-11-30352190660040.240 ppm
2015-11-30352190660050.240 ppm
2016-01-12352250300040.140 ppm
2016-01-12352250300050.170 ppm
2016-01-12352250300040.140 ppm
2016-01-12352250300050.170 ppm
2016-01-25352271290010.150 ppm
2016-01-25352271290020.210 ppm
2016-01-25352271290030.160 ppm
2016-01-25352271290040.150 ppm
2016-01-25352271290050.250 ppm
2016-01-25352271290010.150 ppm
2016-01-25352271290020.210 ppm
2016-01-25352271290030.160 ppm
2016-01-25352271290040.150 ppm
2016-01-25352271290050.250 ppm
2016-02-29352321450010.250 ppm
2016-02-29352321450020.190 ppm
2016-02-29352321450030.170 ppm
2016-02-29352321450010.250 ppm
2016-02-29352321450020.190 ppm
2016-02-29352321450030.170 ppm
2016-04-11352392360010.140 ppm
2016-04-11352392360020.230 ppm
2016-04-11352392360030.130 ppm
2016-04-11352392360040.200 ppm
2016-04-11352392360010.140 ppm
2016-04-11352392360020.230 ppm
2016-04-11352392360030.130 ppm
2016-04-11352392360040.200 ppm
2016-04-20352406740010.230 ppm
2016-04-20352406740020.380 ppm
2016-04-20352406740010.230 ppm
2016-04-20352406740020.380 ppm
2016-04-27352419630010.230 ppm
2016-04-27352419630020.270 ppm
2016-04-27352419630030.230 ppm
2016-04-27352419630040.240 ppm
2016-04-27352419630050.300 ppm
2016-04-27352419630010.230 ppm
2016-04-27352419630020.270 ppm
2016-04-27352419630030.230 ppm
2016-04-27352419630040.240 ppm
2016-04-27352419630050.300 ppm
2016-05-03AE062380.200 ppm
2016-05-03AE062420.200 ppm
2016-05-03AE062460.300 ppm
2016-05-03AE062500.1000 ppm
2016-05-03AE062540.1000 ppm
2016-05-03AE062380.200 ppm
2016-05-03AE062420.200 ppm
2016-05-03AE062460.300 ppm
2016-05-03AE062500.1000 ppm
2016-05-03AE062540.1000 ppm
2016-05-23AE063850.200 ppm
2016-05-23AE063890.1000 ppm
2016-05-23AE063930.1000 ppm
2016-05-23AE063970.1000 ppm
2016-05-23AE064010.400 ppm
2016-05-23AE063850.200 ppm
2016-05-23AE063890.1000 ppm
2016-05-23AE063930.1000 ppm
2016-05-23AE063970.1000 ppm
2016-05-23AE064010.400 ppm
2016-06-08AE065720.1000 ppm
2016-06-08AE065760.1000 ppm
2016-06-08AE065880.200 ppm
2016-06-08AE065720.1000 ppm
2016-06-08AE065760.1000 ppm
2016-06-08AE065880.200 ppm
2016-06-15AE067200.200 ppm
2016-06-15AE067240.200 ppm
2016-06-15AE067280.200 ppm
2016-06-15AE067200.200 ppm
2016-06-15AE067240.200 ppm
2016-06-15AE067280.200 ppm
2016-08-22352614320010.210 ppm
2016-08-22352614320020.240 ppm
2016-08-22352614320010.210 ppm
2016-08-22352614320020.240 ppm
2016-08-30352631520010.240 ppm
2016-08-30352631520010.240 ppm
2016-09-14352658900050.340 ppm
2016-09-14352658900050.340 ppm
2016-09-20352671980010.220 ppm
2016-09-20352671980020.260 ppm
2016-09-20352671980030.240 ppm
2016-09-20352671980040.250 ppm
2016-09-20352671980050.300 ppm
2016-09-20352671980010.220 ppm
2016-09-20352671980020.260 ppm
2016-09-20352671980030.240 ppm
2016-09-20352671980040.250 ppm
2016-09-20352671980050.300 ppm
2016-10-05352701340010.260 ppm
2016-10-05352701340010.260 ppm
2017-01-17AE128410.200 ppm
2017-01-17AE128450.200 ppm
2017-01-17AE128490.500 ppm
2017-01-17AE128530.200 ppm
2017-01-17AE128570.200 ppm
2017-01-17AE128410.200 ppm
2017-01-17AE128450.200 ppm
2017-01-17AE128490.500 ppm
2017-01-17AE128530.200 ppm
2017-01-17AE128570.200 ppm
2017-01-23AE128740.700 ppm
2017-01-23AE128740.700 ppm
2017-04-24AE138580.200 ppm
2017-04-24AE138620.200 ppm
2017-04-24AE138740.200 ppm
2017-04-24AE138580.200 ppm
2017-04-24AE138620.200 ppm
2017-04-24AE138740.200 ppm
2017-05-15AE141350.200 ppm
2017-05-15AE141390.200 ppm
2017-05-15AE141430.200 ppm
2017-05-15AE141470.1000 ppm
2017-05-15AE141510.200 ppm
2017-05-15AE141350.200 ppm
2017-05-15AE141390.200 ppm
2017-05-15AE141430.200 ppm
2017-05-15AE141470.1000 ppm
2017-05-15AE141510.200 ppm
2017-05-23AE141970.1000 ppm
2017-05-23AE142010.200 ppm
2017-05-23AE142050.200 ppm
2017-05-23AE142090.200 ppm
2017-05-23AE141970.1000 ppm
2017-05-23AE142010.200 ppm
2017-05-23AE142050.200 ppm
2017-05-23AE142090.200 ppm
2017-06-05AE142860.200 ppm
2017-06-05AE142980.1000 ppm
2017-06-05AE143020.200 ppm
2017-06-05AE142860.200 ppm
2017-06-05AE142980.1000 ppm
2017-06-05AE143020.200 ppm
2017-06-19AE148740.300 ppm
2017-06-19AE148780.600 ppm
2017-06-19AE148740.300 ppm
2017-06-19AE148780.600 ppm
2017-06-27AE152000.300 ppm
2017-06-27AE152040.200 ppm
2017-06-27AE152080.200 ppm
2017-06-27AE152120.300 ppm
2017-06-27AE152160.200 ppm
2017-06-27AE152000.300 ppm
2017-06-27AE152040.200 ppm
2017-06-27AE152080.200 ppm
2017-06-27AE152120.300 ppm
2017-06-27AE152160.200 ppm
2017-07-18AE157110.1000 ppm
2017-07-18AE157150.200 ppm
2017-07-18AE157190.200 ppm
2017-07-18AE157230.200 ppm
2017-07-18AE157110.1000 ppm
2017-07-18AE157150.200 ppm
2017-07-18AE157190.200 ppm
2017-07-18AE157230.200 ppm
2017-07-25AE159230.200 ppm
2017-07-25AE159270.1000 ppm
2017-07-25AE159230.200 ppm
2017-07-25AE159270.1000 ppm
2017-08-02AE162260.1000 ppm
2017-08-02AE162260.1000 ppm
2017-11-28AE200780.1000 ppm
2017-11-28AE200780.1000 ppm
2017-12-05AE201030.200 ppm
2017-12-05AE201030.200 ppm