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EWG's Tap Water Database — 2021 UPDATE

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Atrazine

Baton Rouge Water Company

Atrazine is a herbicide commonly detected in drinking water that comes from cornfield and other agricultural runoff. It is a hormone disrupter that harms the male and female reproductive systems of people and wildlife. Read More.

Federal laws allow up to 3 parts per billion of atrazine in treated tap water. Water suppliers average atrazine measurements collected over a year, which means that the reported values underestimate intense spikes of elevated exposures during the periods in late spring and early summer when atrazine is applied in large amounts on farm fields.

Human epidemiological studies suggest that federal standards for atrazine are insufficient to protect public health. In 1999 the California Office of Environmental Health Hazard Assessment set a public health goal of 0.15 parts per billion for atrazine in drinking water, based on a study finding increased rates of breast cancer in rats exposed to the chemical. California’s legal maximum for atrazine in tap water is 1 ppb.

Click here to read more about atrazine.

MORE ABOUT THIS CONTAMINANT

 

384

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND500ND
2015ND400ND
2016ND920ND
2017ND660ND
2018ND540ND
2019ND820ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for atrazine was defined by EWG based on epidemiological studies of human exposure to atrazine in drinking water.. This health guideline protects against harm to the developing fetus, harm to the reproductive system and hormone disruption.

EPA Maximum Contaminant
Level (MCL) 3 ppb

The legal limit for atrazine, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s. This limit does not fully protect against harm to the reproductive system, harm to the developing fetus, and hormone disruption.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-13AD88277ND
2014-01-13AD88278ND
2014-01-13AD88279ND
2014-01-13AD88280ND
2014-01-13AD88281ND
2014-01-13AD88277ND
2014-01-13AD88278ND
2014-01-13AD88279ND
2014-01-13AD88280ND
2014-01-13AD88281ND
2014-05-12AD91432ND
2014-05-12AD91433ND
2014-05-12AD91434ND
2014-05-12AD91435ND
2014-05-12AD91436ND
2014-05-12AD91432ND
2014-05-12AD91433ND
2014-05-12AD91434ND
2014-05-12AD91435ND
2014-05-12AD91436ND
2014-05-19AD91649ND
2014-05-19AD91650ND
2014-05-19AD91651ND
2014-05-19AD91652ND
2014-05-19AD91653ND
2014-05-19AD91649ND
2014-05-19AD91650ND
2014-05-19AD91651ND
2014-05-19AD91652ND
2014-05-19AD91653ND
2014-06-09AD92073ND
2014-06-09AD92073ND
2014-07-14AD93462ND
2014-07-14AD93463ND
2014-07-14AD93464ND
2014-07-14AD93462ND
2014-07-14AD93463ND
2014-07-14AD93464ND
2014-07-21AD93465ND
2014-07-21AD94007ND
2014-07-21AD94008ND
2014-07-21AD94009ND
2014-07-21AD94010ND
2014-07-21AD94011ND
2014-07-21AD93465ND
2014-07-21AD94007ND
2014-07-21AD94008ND
2014-07-21AD94009ND
2014-07-21AD94010ND
2014-07-21AD94011ND
2015-03-3035181845005ND
2015-03-3035181845005ND
2015-07-0635196455004ND
2015-07-0635196455005ND
2015-07-0635196455004ND
2015-07-0635196455005ND
2015-08-0335200997001ND
2015-08-0335200997002ND
2015-08-0335200997003ND
2015-08-0335200997004ND
2015-08-0335200997005ND
2015-08-0335200997001ND
2015-08-0335200997002ND
2015-08-0335200997003ND
2015-08-0335200997004ND
2015-08-0335200997005ND
2015-08-1735203438001ND
2015-08-1735203438002ND
2015-08-1735203438001ND
2015-08-1735203438002ND
2015-08-3135205974004ND
2015-08-3135205974005ND
2015-08-3135205974004ND
2015-08-3135205974005ND
2015-11-0235215110001ND
2015-11-0235215110002ND
2015-11-0235215110003ND
2015-11-0235215110001ND
2015-11-0235215110002ND
2015-11-0235215110003ND
2015-11-3035219066001ND
2015-11-3035219066002ND
2015-11-3035219066003ND
2015-11-3035219066004ND
2015-11-3035219066005ND
2015-11-3035219066001ND
2015-11-3035219066002ND
2015-11-3035219066003ND
2015-11-3035219066004ND
2015-11-3035219066005ND
2016-01-1235225030004ND
2016-01-1235225030005ND
2016-01-1235225030004ND
2016-01-1235225030005ND
2016-01-2535227129001ND
2016-01-2535227129002ND
2016-01-2535227129003ND
2016-01-2535227129004ND
2016-01-2535227129005ND
2016-01-2535227129001ND
2016-01-2535227129002ND
2016-01-2535227129003ND
2016-01-2535227129004ND
2016-01-2535227129005ND
2016-02-2935232145001ND
2016-02-2935232145002ND
2016-02-2935232145003ND
2016-02-2935232145001ND
2016-02-2935232145002ND
2016-02-2935232145003ND
2016-04-1135239236001ND
2016-04-1135239236002ND
2016-04-1135239236003ND
2016-04-1135239236004ND
2016-04-1135239236001ND
2016-04-1135239236002ND
2016-04-1135239236003ND
2016-04-1135239236004ND
2016-04-2035240674001ND
2016-04-2035240674002ND
2016-04-2035240674001ND
2016-04-2035240674002ND
2016-04-2735241963001ND
2016-04-2735241963002ND
2016-04-2735241963003ND
2016-04-2735241963004ND
2016-04-2735241963005ND
2016-04-2735241963001ND
2016-04-2735241963002ND
2016-04-2735241963003ND
2016-04-2735241963004ND
2016-04-2735241963005ND
2016-05-0335243244001ND
2016-05-0335243244002ND
2016-05-0335243244003ND
2016-05-0335243244004ND
2016-05-0335243244005ND
2016-05-0335243244001ND
2016-05-0335243244002ND
2016-05-0335243244003ND
2016-05-0335243244004ND
2016-05-0335243244005ND
2016-05-2335246272001ND
2016-05-2335246272002ND
2016-05-2335246272003ND
2016-05-2335246272004ND
2016-05-2335246272005ND
2016-05-2335246272001ND
2016-05-2335246272002ND
2016-05-2335246272003ND
2016-05-2335246272004ND
2016-05-2335246272005ND
2016-06-0835249002001ND
2016-06-0835249002002ND
2016-06-0835249002003ND
2016-06-0835249002001ND
2016-06-0835249002002ND
2016-06-0835249002003ND
2016-06-1535250200002ND
2016-06-1535250200003ND
2016-06-1535250200002ND
2016-06-1535250200003ND
2016-08-2235261432001ND
2016-08-2235261432002ND
2016-08-2235261432001ND
2016-08-2235261432002ND
2016-08-3035263152001ND
2016-08-3035263152001ND
2016-09-1435265890005ND
2016-09-1435265890005ND
2016-09-2035267198001ND
2016-09-2035267198002ND
2016-09-2035267198003ND
2016-09-2035267198004ND
2016-09-2035267198005ND
2016-09-2035267198001ND
2016-09-2035267198002ND
2016-09-2035267198003ND
2016-09-2035267198004ND
2016-09-2035267198005ND
2016-10-0535270134001ND
2016-10-0535270134001ND
2017-01-1735289852001ND
2017-01-1735289852002ND
2017-01-1735289852003ND
2017-01-1735289852004ND
2017-01-1735289852005ND
2017-01-1735289852001ND
2017-01-1735289852002ND
2017-01-1735289852003ND
2017-01-1735289852004ND
2017-01-1735289852005ND
2017-01-1935290610001ND
2017-01-1935290610001ND
2017-04-2435308489001ND
2017-04-2435308489002ND
2017-04-2435308489003ND
2017-04-2435308489001ND
2017-04-2435308489002ND
2017-04-2435308489003ND
2017-05-1535312720001ND
2017-05-1535312720002ND
2017-05-1535312720003ND
2017-05-1535312720004ND
2017-05-1535312720005ND
2017-05-1535312720001ND
2017-05-1535312720002ND
2017-05-1535312720003ND
2017-05-1535312720004ND
2017-05-1535312720005ND
2017-05-2335314374001ND
2017-05-2335314374002ND
2017-05-2335314374003ND
2017-05-2335314374004ND
2017-05-2335314374005ND
2017-05-2335314374001ND
2017-05-2335314374002ND
2017-05-2335314374003ND
2017-05-2335314374004ND
2017-05-2335314374005ND
2017-06-0535316773001ND
2017-06-0535316773002ND
2017-06-0535316773003ND
2017-06-0535316773001ND
2017-06-0535316773002ND
2017-06-0535316773003ND
2017-06-1935319736004ND
2017-06-1935319736005ND
2017-06-1935319736004ND
2017-06-1935319736005ND
2017-06-2735321021002ND
2017-06-2735321021003ND
2017-06-2735321021004ND
2017-06-2735321021002ND
2017-06-2735321021003ND
2017-06-2735321021004ND
2017-07-1835325014001ND
2017-07-1835325014002ND
2017-07-1835325014003ND
2017-07-1835325014004ND
2017-07-1835325014001ND
2017-07-1835325014002ND
2017-07-1835325014003ND
2017-07-1835325014004ND
2017-11-2835360036001ND
2017-11-2835360036001ND
2017-12-0535361478001ND
2017-12-0535361478001ND
2018-03-1235379759001ND
2018-03-1235379759002ND
2018-03-1235379759001ND
2018-03-1235379759002ND
2018-04-1035385805004ND
2018-04-1035385805005ND
2018-04-1035385805004ND
2018-04-1035385805005ND
2018-04-1735386963001ND
2018-04-1735386963002ND
2018-04-1735386963003ND
2018-04-1735386963004ND
2018-04-1735386963001ND
2018-04-1735386963002ND
2018-04-1735386963003ND
2018-04-1735386963004ND
2018-06-1135398105001ND
2018-06-1135398105002ND
2018-06-1135398105001ND
2018-06-1135398105002ND
2018-09-2035419431001ND
2018-09-2035419431002ND
2018-09-2035419431003ND
2018-09-2035419431004ND
2018-09-2035419431001ND
2018-09-2035419431002ND
2018-09-2035419431003ND
2018-09-2035419431004ND
2018-09-2435420620001ND
2018-09-2435420620002ND
2018-09-2435420620003ND
2018-09-2435420620004ND
2018-09-2435420620001ND
2018-09-2435420620002ND
2018-09-2435420620003ND
2018-09-2435420620004ND
2018-10-1135424005001ND
2018-10-1135424005001ND
2018-12-0335434672001ND
2018-12-0335434672002ND
2018-12-0335434941001ND
2018-12-0335434672001ND
2018-12-0335434672002ND
2018-12-0335434941001ND
2018-12-0435434931001ND
2018-12-0435434931002ND
2018-12-0435434931001ND
2018-12-0435434931002ND
2018-12-1135436979001ND
2018-12-1135436979002ND
2018-12-1135436979003ND
2018-12-1135436979001ND
2018-12-1135436979002ND
2018-12-1135436979003ND
2019-01-2335444341001ND
2019-01-2335444343001ND
2019-01-2335444344001ND
2019-01-2335444341001ND
2019-01-2335444343001ND
2019-01-2335444344001ND
2019-02-1435448564001ND
2019-02-1435448564002ND
2019-02-1435448564001ND
2019-02-1435448564002ND
2019-03-1435454833001ND
2019-03-1435454833002ND
2019-03-1435454833001ND
2019-03-1435454833002ND
2019-03-1835455451001ND
2019-03-1835455451002ND
2019-03-1835455451003ND
2019-03-1835455451004ND
2019-03-1835455451001ND
2019-03-1835455451002ND
2019-03-1835455451003ND
2019-03-1835455451004ND
2019-03-2535457421001ND
2019-03-2535457421001ND
2019-04-0935460483001ND
2019-04-0935460483002ND
2019-04-0935460483003ND
2019-04-0935460483001ND
2019-04-0935460483002ND
2019-04-0935460483003ND
2019-04-2435464166001ND
2019-04-2435464166002ND
2019-04-2435464166003ND
2019-04-2435464166004ND
2019-04-2435464166001ND
2019-04-2435464166002ND
2019-04-2435464166003ND
2019-04-2435464166004ND
2019-04-2935464817001ND
2019-04-2935464817002ND
2019-04-2935464817001ND
2019-04-2935464817002ND
2019-05-1635469376001ND
2019-05-1635469376002ND
2019-05-1635469376001ND
2019-05-1635469376002ND
2019-06-1235475393001ND
2019-06-1235475393002ND
2019-06-1235475393003ND
2019-06-1235475393004ND
2019-06-1235475393001ND
2019-06-1235475393002ND
2019-06-1235475393003ND
2019-06-1235475393004ND
2019-08-2135492794001ND
2019-08-2135492794002ND
2019-08-2135492794003ND
2019-08-2135492794001ND
2019-08-2135492794002ND
2019-08-2135492794003ND
2019-10-0735503317001ND
2019-10-0735503317002ND
2019-10-0735503317003ND
2019-10-0735503317004ND
2019-10-0735503317001ND
2019-10-0735503317002ND
2019-10-0735503317003ND
2019-10-0735503317004ND
2019-10-2835508802001ND
2019-10-2835508802001ND
2019-11-2035514423001ND
2019-11-2035514423001ND
2019-12-0335516732001ND
2019-12-0335516732002ND
2019-12-0335516732003ND
2019-12-0335516732001ND
2019-12-0335516732002ND
2019-12-0335516732003ND
2019-12-0435516731001ND
2019-12-0435516731002ND
2019-12-0435516731001ND
2019-12-0435516731002ND