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EWG's Tap Water Database

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Atrazine

Hammond Water Works Department

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
2010ND40ND
2011ND40ND
2012ND40ND
2013ND40ND
2014ND40ND
2015ND40ND

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
2010-02-09241100RS525-1001ND
2010-05-11245368RS525-1002ND
2010-08-09249714RS525-1003ND
2010-11-082533973RS525-1004ND
2011-02-08258116RS-1101ND
2011-05-09262042RS525-1102ND
2011-08-08266715RS525-1103ND
2011-11-08271308RS525-1104ND
2012-02-07275024RS525-1201ND
2012-05-16279895RS28-1202ND
2012-08-14284358RS28-1203ND
2012-11-13288500RS525-1204ND
2013-02-11292113RS525-1301ND
2013-05-14296662RS525-1302ND
2013-08-13301705RS525-1303ND
2013-11-12307095RS525-1304ND
2014-02-10311576RS525-1401ND
2014-05-13317542RS525-1402ND
2014-08-13323408RS525-1403ND
2014-11-12329226RS525-1404ND
2015-02-10334196RS525-1501ND
2015-05-12340057RS28-1502ND
2015-08-11346314RS28-1503ND
2015-11-10352794RS525-1504ND