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EWG's Tap Water Database

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Atrazine

Beauregard Water Works District #3

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011N/A00N/A
2012ND60ND
2013ND50ND
2014N/A00N/A
2015ND10ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.1 ppb

The 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.

ppb = parts per billion.

EPA Maximum Contaminant
Level (MCL) 3 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)3 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2012-06-193560137W12ND
2012-06-193560137W12ND
2012-11-05AD72987ND
2012-11-05AD72986ND
2012-11-05AD72985ND
2012-11-05AD72984ND
2012-11-05AD72988ND
2012-11-05AD72988ND
2012-11-05AD72987ND
2012-11-05AD72986ND
2012-11-05AD72985ND
2012-11-05AD72984ND
2013-01-14AD74759ND
2013-01-14AD74760ND
2013-01-14AD74761ND
2013-01-14AD74761ND
2013-01-14AD74760ND
2013-01-14AD74759ND
2013-01-14AD74758ND
2013-01-14AD74757ND
2013-01-14AD74757ND
2013-01-14AD74758ND
2015-03-0235177665002ND
2015-03-0235177665002ND