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EWG's Tap Water Database — 2021 UPDATE

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Atrazine

Hicksville 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.

MORE ABOUT THIS CONTAMINANT

 

76

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND90ND
2015ND120ND
2016ND90ND
2017ND50ND
2018ND120ND
2019ND290ND

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
2014-06-231406G49-002-SOCSND
2014-06-231406G06-001-SOCSND
2014-06-231406G06-002-SOCSND
2014-06-231406G06-003-SOCSND
2014-06-231406G06-004-SOCSND
2014-06-231406G49-003-SOCSND
2014-06-231406G49-001-SOCSND
2014-08-131408900-002-SOCSND
2014-08-131408900-001-SOCSND
2015-11-161511C01-001-SOCSND
2015-12-031512265-001-SOCSND
2015-12-071512556-001-SOCSND
2015-12-071512556-002-SOCSND
2015-12-091512765-001-SOCSND
2015-12-091512765-002-SOCSND
2015-12-101512888-002-SOCSND
2015-12-101512919-001-SOCSND
2015-12-101512888-0001-SOCND
2015-12-171512F02-002-SOCSND
2015-12-171512F02-003-SOCSND
2015-12-171512F02-001-SOCSND
2016-10-12702446001ND
2016-10-12702446002ND
2016-10-13702004001ND
2016-10-18702272001-SOCSND
2016-10-18702272002-SOCSND
2016-10-24702740002ND
2016-10-24702740001ND
2016-10-25702942001ND
2016-10-25702945001AND
2017-06-157021489002-SOCSND
2017-06-157021489001-SOCSND
2017-06-217022029003-SOCSND
2017-06-217022029001ND
2017-06-217022029002-SOCSND
2018-12-107073415003-SOCSND
2018-12-107073415005-SOCSND
2018-12-107073415002-SOCSND
2018-12-107073415004-SOCSND
2018-12-107073415001-SOCSND
2018-12-117073560002-SOCSND
2018-12-117073560001ND
2018-12-127073759002-SOCSND
2018-12-127073759001-SOCSND
2018-12-137073937002-SOCSND
2018-12-137073937001-SOCSND
2018-12-147074047001-SOCSND
2019-06-107092931001ND
2019-06-107092931002ND
2019-06-10D9F1485-01ND
2019-06-107092931002-SOCSND
2019-06-107092931001-SOCSND
2019-06-10D9F1485-02ND
2019-06-127093435001ND
2019-06-12D9F1688-02ND
2019-06-127093435002ND
2019-06-12D9F1688-01ND
2019-06-18D9F2337-01ND
2019-06-187094125001ND
2019-06-207094870001ND
2019-06-207094870002ND
2019-06-207094870004ND
2019-06-247094942001ND
2019-06-247094894002ND
2019-06-247094894003ND
2019-06-247094894001ND
2019-06-247094894006ND
2019-06-247094894005ND
2019-06-247094942002ND
2019-06-257095112001ND
2019-06-257095112004ND
2019-06-257095112002ND
2019-06-267094894004ND
2019-06-267094870003ND
2019-06-287095112003ND
2019-09-1870105435001ND