Know Your Environment. Protect Your Health.

Atrazine

Mountain Hill Water Company

NOTE: Mountain Hill Water Company purchases water from Town of North East which is required to test for atrazine. Sample information shown below was taken by Town of North East.

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND10ND
2020N/A00N/A
2021ND20ND
2022N/A00N/A
2023ND60ND

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

NOTE: Mountain Hill Water Company purchases water from Town of North East which is required to test for atrazine. Sample information shown below was taken by Town of North East.

Date Lab ID Result
2018-04-24E18003794003ND
2018-04-24E18003794001ND
2018-09-17L7072754_1ND
2018-09-17L7072754_2ND
2018-11-194132323ND
2019-04-099043716_01ND
2019-04-099043716_02ND
2019-10-089102287_02ND
2019-10-089102287_01_01ND
2021-06-23E21003831001ND
2021-06-23E21003832001ND
2023-07-243G05934_01ND
2023-07-243G05934_02ND
2023-11-133K03122_01ND
2023-11-133K03122_01BND
2023-11-133K03122_02ND
2023-11-133K03122_02BND