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Atrazine

Sharon Water Supply Corporation

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.

MORE ABOUT THIS CONTAMINANT

 

64

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND100ND
2019ND150ND
2020ND110ND
2021ND100ND
2022ND90ND
2023ND90ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-02-23Q1807827001ND
2018-03-13Q1810062017ND
2018-03-13Q1810062022ND
2018-03-13Q1810062021ND
2018-03-13Q1810062019ND
2018-03-13Q1810062018ND
2018-03-13Q1810062020ND
2018-05-15Q1819684001ND
2018-08-23Q1833888001ND
2018-12-05Q1849613001ND
2019-03-20Q1911547001ND
2019-03-20Q1911547006ND
2019-06-06Q1932969036ND
2019-06-06Q1932969037ND
2019-06-06Q1932969019ND
2019-06-06Q1932969018ND
2019-06-06Q1932969016ND
2019-06-06Q1932969015ND
2019-06-06Q1932969014ND
2019-06-06Q1932969017ND
2019-08-27Q1959747001ND
2019-08-27Q1959747006ND
2019-08-27Q1959747011ND
2019-10-30Q1974573010ND
2019-10-30Q1974573009ND
2020-01-21Q2002254013ND
2020-01-21Q2002254014ND
2020-01-21Q2002254015ND
2020-04-08Q2014338005ND
2020-09-28Q2038315001ND
2020-10-21Q2041036037ND
2020-10-21Q2041036036ND
2020-10-21Q2041036034ND
2020-10-21Q2041036033ND
2020-10-21Q2041036013ND
2020-10-21Q2041036035ND
2021-03-29Q2107862001ND
2021-06-14Q2115406001ND
2021-09-22Q2126011001ND
2021-11-23Q2132764001ND
2021-11-23Q2132764002ND
2021-11-23Q2132764003ND
2021-11-23Q2132764004ND
2021-11-23Q2132764005ND
2021-11-23Q2132764006ND
2021-11-23Q2132764007ND
2022-03-09Q2208229001ND
2022-05-31Q2215344003ND
2022-09-20Q2228039001ND
2022-10-20Q2231930002ND
2022-10-20Q2231930017ND
2022-10-20Q2231930018ND
2022-10-20Q2231930019ND
2022-10-20Q2231930020ND
2022-10-20Q2231930021ND
2023-01-11Q2301806004ND
2023-04-13Q2313727001ND
2023-08-15Q2334031010ND
2023-08-15Q2334031011ND
2023-08-15Q2334031012ND
2023-10-25Q2346021005ND
2023-10-25Q2346021016ND
2023-10-25Q2346021017ND
2023-10-25Q2346021018ND
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