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EWG's Tap Water Database — 2019 UPDATE

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Atrazine

Kelly Lane WCID 2

NOTE: Kelly Lane WCID 2 purchases water from Manville WSC which is required to test for atrazine. Sample information shown below was taken by Manville WSC.

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.

 

34

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.0460 ppb51ND - 0.230 ppb
2013ND60ND
2014ND20ND
20150.0657 ppb72ND - 0.270 ppb
20160.155 ppb103ND - 0.660 ppb
2017ND40ND

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

NOTE: Kelly Lane WCID 2 purchases water from Manville WSC which is required to test for atrazine. Sample information shown below was taken by Manville WSC.

Date Lab ID Result
2012-02-08AB80719ND
2012-02-08AB80720ND
2012-06-14AB928700.230 ppb
2012-06-14AB92869ND
2012-11-091211331001ND
2013-02-191302607012ND
2013-02-191302607013ND
2013-02-191302607015ND
2013-02-191302607016ND
2013-02-191302607014ND
2013-05-021305112003ND
2014-03-11AC46602ND
2014-03-11AC46607ND
2015-03-19AC85444ND
2015-03-19AC85441ND
2015-03-19AC85435ND
2015-05-26AC93327ND
2015-09-22AD081060.270 ppb
2015-11-18AD141160.190 ppb
2015-11-18AD14115ND
2016-02-08AD22566ND
2016-02-08AD22587ND
2016-04-25AD34086ND
2016-04-25AD34088ND
2016-04-25AD340890.630 ppb
2016-04-25AD34090ND
2016-04-25AD340870.660 ppb
2016-09-06AD479850.260 ppb
2016-11-09AD57519ND
2016-11-09AD57518ND
2017-01-23AD66233ND
2017-01-23AD66232ND
2017-04-27AD81589ND
2017-04-27AD81592ND