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EWG's Tap Water Database — 2019 UPDATE

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Atrazine

Charlotte Water

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND100ND
2013ND80ND
2014N/A00N/A
2015ND150ND
2016N/A00N/A
2017ND150ND

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
2012-02-092589818ND
2012-02-092589824ND
2012-02-092589830ND
2012-02-092589836ND
2012-02-092589812ND
2012-08-072689114ND
2012-08-072689120ND
2012-08-072689126ND
2012-08-072689132ND
2012-08-072689138ND
2013-03-27201303290113ND
2013-03-27201303290111ND
2013-03-27201303290112ND
2013-06-25201306260245ND
2013-06-25201306260261ND
2013-06-25201306260199ND
2013-09-04201309050362ND
2013-09-04201309060280ND
2015-06-25ND
2015-06-25ND
2015-06-25ND
2015-06-25ND
2015-06-25ND
2015-08-17ND
2015-08-17ND
2015-08-17ND
2015-08-17ND
2015-08-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2017-02-0992329527001SOCND
2017-02-0992329527005SOCND
2017-02-0992329527004SOCND
2017-02-0992329527003SOCND
2017-02-0992329527002SOCND
2017-05-1092340277005SOCND
2017-05-1092340277004SOCND
2017-05-1092340277003SOCND
2017-05-1092340277002SOCND
2017-05-1092340277001SOCND
2017-07-0592346756001SOCND
2017-07-0592346756002SOCND
2017-07-0592346756003SOCND
2017-07-0592346756004SOCND
2017-07-0592346756005SOCND