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EWG's Tap Water Database — 2019 UPDATE

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Atrazine

University of Kansas

NOTE: University of Kansas purchases water from City of Lawrence which is required to test for atrazine. Sample information shown below was taken by City of Lawrence.

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.

 

68

Samples

1

Samples exceeding legal limit (MCL)

20

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.358 ppb127ND - 3.00 ppb
20130.238 ppb167ND - 2.40 ppb
20140.375 ppb125ND - 3.10 ppb
20150.0500 ppb41ND - 0.200 ppb
20160.125 ppb82ND - 0.900 ppb
20170.263 ppb167ND - 1.50 ppb

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

NOTE: University of Kansas purchases water from City of Lawrence which is required to test for atrazine. Sample information shown below was taken by City of Lawrence.

Date Lab ID Result
2012-02-15FEB2012-SEMIVOC0.1000 ppb
2012-02-15FEB-12-SEMIVOC0.300 ppb
2012-04-04APR12-ATRZ-INT 90.600 ppb
2012-04-04APR12-ATRZ-TP1ND
2012-04-23APR12-ATRZ-INT 93.00 ppb
2012-04-23APR12-ATRZ-TP2ND
2012-05-16MAY2012-SEMIVOC0.1000 ppb
2012-05-16MAY-12-SEMIVOCND
2012-06-06JUN12-ATRZ-TP2ND
2012-06-06JUN12-ATRZ-TP10.1000 ppb
2012-11-14NOV2012-SEMIVOCND
2012-11-14NOV-12-SEMIVOC0.1000 ppb
2013-02-13FEB2013-SEMIVOC0.1000 ppb
2013-02-13FEB-13-SEMIVOC0.1000 ppb
2013-04-03APR13-ATRZ-INT 90.200 ppb
2013-04-03APR13-ATRZ-INT 90.400 ppb
2013-04-03APR13-ATRZ-TP1ND
2013-04-03APR13-ATRZ-TP2ND
2013-05-13MAY2013-SEMIVOCND
2013-05-13MAY-13-SEMIVOCND
2013-06-05JUN13-ATRZ-TP20.200 ppb
2013-06-05JUN13-ATRZ-TP1ND
2013-06-05JUN13-ATRZ-INT 92.40 ppb
2013-06-05JUN13-ATRZ-INT 90.400 ppb
2013-08-14AUG-13-SEMIVOCND
2013-08-22AUG2013-OC_525ND
2013-11-13NOV2013-SEMIVOCND
2013-11-13NOV-13-SEMIVOCND
2014-02-12FEB-14-SEMIVOCND
2014-02-12FEB2014-SEMIVOC0.200 ppb
2014-04-17APR14-ATRZ-TP1ND
2014-04-17APR14-ATRZ-TP20.200 ppb
2014-05-21MAY2014-SEMIVOCND
2014-05-21MAY-14-SEMIVOC0.500 ppb
2014-06-04JUN14-ATRZ-INT 93.10 ppb
2014-06-04JUN14-ATRZ-TP1ND
2014-06-04JUN14-ATRZ-INT 90.500 ppb
2014-06-04JUN14-ATRZ-TP2ND
2014-08-13AUG-14-SEMIVOCND
2014-08-13AUG2014-SEMIVOCND
2015-05-06MAY2015-SEMIVOCND
2015-05-06MAY-15-SEMIVOC0.200 ppb
2015-06-01JUN15-ATRZ-TP1ND
2015-06-01JUN15-ATRZ-TP2ND
2016-05-04MAY-16-SEMIVOC0.1000 ppb
2016-05-04MAY2016-SEMIVOCND
2016-06-023463572- ATRZND
2016-06-023463555-ATRZ0.900 ppb
2016-08-173525736- ATRZND
2016-08-173525731-ATRZND
2016-11-163588394- ATRZND
2016-11-163587726- ATRZND
2017-02-152017-02-15-CLT-A0.600 ppb
2017-02-152017-02-15-TP2-AND
2017-02-152017-02-15-KAW-A0.500 ppb
2017-02-152017-02-15-TP1-AND
2017-04-042017-04-04-TP2-A0.1000 ppb
2017-04-042017-04-04-TP1-AND
2017-04-042017-04-04-KAW-A1.50 ppb
2017-04-042017-04-04-CLT-A0.500 ppb
2017-06-142017-06-14-TP001ND
2017-06-142017-06-14-TP002ND
2017-08-012017-08-01-CLT-A0.900 ppb
2017-08-012017-08-01-TP1-AND
2017-08-152017-08-15-TP1-AND
2017-08-152017-08-15-TP2-A0.1000 ppb
2017-11-152017-11-15-TP1-AND
2017-12-212017-12-21-TP2-AND