Know Your Environment. Protect Your Health.

Atrazine

Rancho Brazos Subdivision

NOTE: Rancho Brazos Subdivision purchases water from Acton MUD which is required to test for atrazine. Sample information shown below was taken by Acton MUD.

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.

 

57

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND10ND
2023ND10ND

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: Rancho Brazos Subdivision purchases water from Acton MUD which is required to test for atrazine. Sample information shown below was taken by Acton MUD.

Date Lab ID Result
2018-03-28Q1812936024ND
2018-03-28Q1812936023ND
2018-03-28Q1812936028ND
2018-03-28Q1812936027ND
2018-03-28Q1812936025ND
2018-03-28Q1812936026ND
2018-05-01Q1817372011ND
2018-05-01Q1817372012ND
2018-05-01Q1817372013ND
2018-05-01Q1817372014ND
2019-01-10Q1901506004ND
2019-01-10Q1901506010ND
2019-03-26Q1912275045ND
2019-03-26Q1912275051ND
2019-03-26Q1912275050ND
2019-03-26Q1912275049ND
2019-03-26Q1912275048ND
2019-03-26Q1912275047ND
2019-03-26Q1912275046ND
2019-03-26Q1912275044ND
2019-03-26Q1912275043ND
2019-03-26Q1912275042ND
2019-03-26Q1912275041ND
2020-03-04Q2008205033ND
2020-03-04Q2008205034ND
2020-03-04Q2008205035ND
2020-03-04Q2008205036ND
2020-03-25Q2012703025ND
2020-07-29Q2029640009ND
2020-07-29Q2029640010ND
2021-02-09Q2103864001ND
2021-02-09Q2103864002ND
2021-02-09Q2103864003ND
2021-02-09Q2103864004ND
2021-02-09Q2103864005ND
2021-04-01Q2108342001ND
2021-04-01Q2108342004ND
2021-04-01Q2108342007ND
2021-04-01Q2108342010ND
2021-04-01Q2108342012ND
2021-07-22Q2119289001ND
2022-01-27Q2202897009ND
2022-01-27Q2202897004ND
2022-01-27Q2202897002ND
2022-10-06Q2230209009ND
2022-10-06Q2230209010ND
2022-10-06Q2230209011ND
2022-10-06Q2230209012ND
2022-10-06Q2230209013ND
2022-10-06Q2230209014ND
2022-10-06Q2230209015ND
2022-10-06Q2230209016ND
2023-10-18Q2344522027ND
2023-10-18Q2344522028ND
2023-11-14Q2348718028ND
2023-11-14Q2348718029ND
2023-11-14Q2348718030ND