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EWG's Tap Water Database — 2019 UPDATE

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Atrazine

City of Sugar Land

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND60ND
20130.170 ppb110.170 ppb
20140.300 ppb41ND - 1.20 ppb
20150.0882 ppb117ND - 0.180 ppb
20160.240 ppb330.230 ppb - 0.250 ppb
20170.0633 ppb31ND - 0.190 ppb

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
2012-03-22AB84944ND
2012-03-22AB84946ND
2012-03-22AB84948ND
2012-03-22AB84947ND
2012-03-22AB84945ND
2012-08-23AB99569ND
2013-12-30AC384050.170 ppb
2014-02-11AC42308ND
2014-04-29AC521601.20 ppb
2014-07-23AC60734ND
2014-10-14AC69622ND
2015-01-22AC773920.150 ppb
2015-04-01AC870050.180 ppb
2015-04-01AC87007ND
2015-04-01AC87008ND
2015-04-01AC87000ND
2015-04-01AC870060.180 ppb
2015-04-01AC87001ND
2015-09-30AD091690.120 ppb
2015-09-30AD091640.140 ppb
2015-11-04AD126760.1000 ppb
2015-11-04AD126920.1000 ppb
2016-02-02AD216240.240 ppb
2016-02-02AD216230.250 ppb
2016-02-02AD216250.230 ppb
2017-01-04AD630680.190 ppb
2017-03-22AD76458ND
2017-04-03AD78167ND