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EWG's Tap Water Database — 2019 UPDATE

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Atrazine

Plainview WD

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.

 

65

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
2013ND120ND
2014ND90ND
2015ND110ND
2016ND110ND
2017ND140ND

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
2012-09-171209790-001-SOCSND
2012-10-151210783-001-SOCSND
2012-12-17121820-001-SOCSND
2012-12-171212860-001-SOCSND
2012-12-181212919-003-SOCSND
2012-12-181212919-001-SOCSND
2012-12-181212919-002-SOCSND
2012-12-181212919-004-SOCSND
2013-02-271302B26-001-SOCSND
2013-02-271302B26-002-SOCSND
2013-02-281302B73-001-SOCSND
2013-02-281302B93-001-SOCSND
2013-03-121303504-002-SOCSND
2013-03-121303504-001-SOCSND
2013-03-131303645-001-SOCSND
2013-03-131303645-002-SOCSND
2013-03-201303977-002-SOCSND
2013-03-201303977-001-SOCSND
2013-03-271303C97-001-SOCSND
2013-04-301304G59-001-SOCSND
2014-01-131401427-003-SOCSND
2014-01-131401452-002-SOCSND
2014-01-131401452-001-SOCSND
2014-01-131401427-002-SOCSND
2014-01-131401427-001-SOCSND
2014-01-171401784-002-SOCSND
2014-01-171401784-001-SOCSND
2014-01-281401B24-002-SOCSND
2014-01-281401B24-001-SOCSND
2015-01-131501687-001-SOCSND
2015-01-131501687-002-SOCSND
2015-01-131501859-001-SOCSND
2015-01-141501751-002-SOCSND
2015-01-141501751-001-SOCSND
2015-01-151501859-002-POCSND
2015-01-231501E11-002-SOCSND
2015-01-231501E11-003-SOCSND
2015-01-231501E11-001-SOCSND
2015-05-081505607-001-SOCSND
2015-10-0715105630001-SOCSND
2016-01-141601939-001-SOCSND
2016-01-141601939-004-SOCSND
2016-01-141601939-003-SOCSND
2016-01-141601939-002-SOCSND
2016-01-151601A31-001ND
2016-01-151601A31-002-SOCSND
2016-01-191601B54-002-SOCSND
2016-01-191601B54-001-SOCSND
2016-03-171603E00-001-SOCSND
2016-03-171603E00-002-SOCSND
2016-04-281604Q17-001-SOCSND
2017-01-03708178001-SOCND
2017-01-05708358001ND
2017-01-10708699001ND
2017-01-11708893002ND
2017-01-11709288001ND
2017-01-11708893003ND
2017-01-11709288002ND
2017-01-11708894001ND
2017-01-11708893001ND
2017-01-11708893004ND
2017-01-12708985001-SOCND
2017-01-307010126001ND
2017-01-317010228001ND
2017-04-197016312001ND