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EWG's Tap Water Database — 2021 UPDATE

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Atrazine

WA of Great Neck North

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

 

68

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND110ND
2015ND120ND
2016ND110ND
2017ND130ND
2018ND100ND
2019ND110ND

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
2014-01-221401936-001-SOCSND
2014-01-291401C13-001-SOCSND
2014-05-071405482-001-SOCSND
2014-05-281405J52-001-SOCSND
2014-06-251406I69-001-SOCSND
2014-07-021407155-001-SOCSND
2014-07-151407B47-001-SOCSND
2014-07-151407B47-002-SOCSND
2014-07-231407G56-002-SOCSND
2014-07-231407G56-001-SOCSND
2014-08-141408873-001-POCSND
2015-03-041503285-001-SOCSND
2015-03-101503586-001-SOCSND
2015-04-221504M39-001-SOCSND
2015-05-131505961-001-SOCSND
2015-05-191505D38-001-SOCSND
2015-05-271505J24-001-SOCSND
2015-06-171506E39-001-SOCSND
2015-07-011507073-001-SOCSND
2015-07-081507543-001-SOCSND
2015-07-221507G03-001-SOCSND
2015-08-051508394-001ND
2015-08-121508A11-001-SOCSND
2016-06-221606M90-001-SOCSND
2016-06-221606M90-002-SOCSND
2016-07-061607368-002-SOCSND
2016-07-061607368-001-SOCSND
2016-07-131607999-001-SOCSND
2016-07-201607H11-001-SOCSND
2016-07-201607H11-002-SOCSND
2016-07-271607O22-002-SOCSND
2016-07-271607O22-001-SOCSND
2016-08-031608402-001-SOCSND
2016-08-101608B21-001-SOCSND
2017-06-157021485001-SOCSND
2017-08-017025952002-SOCSND
2017-08-027025952001-SOCSND
2017-08-107026786001ND
2017-08-107026786002ND
2017-08-167027412001-SOCSND
2017-08-177027471002-SOCSND
2017-08-177027471001-SOCSND
2017-08-237028018001ND
2017-08-247028089002ND
2017-08-247028538001ND
2017-08-247028089001ND
2017-12-217038763001ND
2018-03-217046046001ND
2018-06-187055315001ND
2018-07-187060047001ND
2018-07-187058663002ND
2018-07-187058663001ND
2018-07-257059409001ND
2018-08-017060047002ND
2018-08-027060228001ND
2018-09-197065376002ND
2018-09-197065376001ND
2019-08-0770100283003ND
2019-08-0770100283001ND
2019-08-0770100283002ND
2019-08-1470101314002ND
2019-08-1470101314001ND
2019-08-1470101314003ND
2019-08-2170102284003ND
2019-08-2170102284002ND
2019-08-2870102284001ND
2019-08-2870103083001ND
2019-08-2870103083002ND