Know Your Environment. Protect Your Health.

Atrazine

Hillview Water Company-oakhurst/sierra Lakes

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.

 

85

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND200ND
2019ND90ND
2020ND120ND
2021ND240ND
2022ND60ND
2023ND140ND

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
2018-04-30CA2010007_047_047-201804301410ND
2018-04-30CA2010007_048_048-201804301432ND
2018-04-30CA2010007_046_046-201804301410ND
2018-06-12CA2010007_024_024-201806121500ND
2018-07-10CA2010007_046_046-201807101325ND
2018-07-10CA2010007_048_048-201807101418ND
2018-07-10CA2010007_024_024-201807101515ND
2018-07-10CA2010007_002_002-201807100925ND
2018-07-10CA2010007_007_007-201807100902ND
2018-07-10CA2010007_001_001-201807100955ND
2018-07-10CA2010007_047_047-201807101445ND
2018-07-10CA2010007_028_028-201807101615ND
2018-07-10CA2010007_003_003-201807101020ND
2018-07-25CA2010007_009_009-201807251000ND
2018-07-25CA2010007_010_010-201807251025ND
2018-08-22CA2010007_041_041-201808221017ND
2018-08-22CA2010007_039_039-201808220949ND
2018-10-10CA2010007_046_046-201810100925ND
2018-10-10CA2010007_048_048-201810101041ND
2018-10-10CA2010007_047_047-201810101002ND
2019-01-08CA2010007_048_048-201901081335ND
2019-01-08CA2010007_046_046-201901081140ND
2019-01-08CA2010007_047_047-201901081315ND
2019-04-24CA2010007_047_047-201904240908ND
2019-04-24CA2010007_048_048-201904240925ND
2019-04-24CA2010007_046_046-201904240855ND
2019-07-31CA2010007_046_046-201907310828ND
2019-07-31CA2010007_047_047-201907311021ND
2019-07-31CA2010007_048_048-201907311034ND
2020-08-05CA2010007_031_031-202008051223ND
2020-08-05CA2010007_030_030-202008051153ND
2020-08-05CA2010007_034_034-202008051125ND
2020-08-05CA2010007_032_032-202008051253ND
2020-08-05CA2010007_033_033-202008051313ND
2020-08-05CA2010007_017_017-202008051353ND
2020-12-09CA2010007_017_017-202012091258ND
2020-12-09CA2010007_034_034-202012091158ND
2020-12-10CA2010007_031_031-202012101648ND
2020-12-10CA2010007_033_033-202012101725ND
2020-12-10CA2010007_030_030-202012101120ND
2020-12-10CA2010007_032_032-202012101705ND
2021-02-17CA2010007_040_040-202102171050ND
2021-05-17CA2010007_028_028-202105170815ND
2021-05-17CA2010007_039_039-202105170843ND
2021-05-17CA2010007_040_040-202105170857ND
2021-05-17CA2010007_041_041-202105170914ND
2021-05-18CA2010007_024_024-202105180846ND
2021-05-18CA2010007_002_002-202105180859ND
2021-05-18CA2010007_003_003-202105180915ND
2021-05-18CA2010007_001_001-202105180906ND
2021-05-19CA2010007_009_009-202105191059ND
2021-05-19CA2010007_007_007-202105191054ND
2021-05-19CA2010007_010_010-202105191038ND
2021-08-16CA2010007_039_039-202108160808ND
2021-08-16CA2010007_009_009-202108160908ND
2021-08-16CA2010007_040_040-202108160908ND
2021-08-16CA2010007_024_024-202108160908ND
2021-08-16CA2010007_003_003-202108160808ND
2021-08-16CA2010007_001_001-202108160808ND
2021-08-16CA2010007_041_041-202108160908ND
2021-08-16CA2010007_010_010-202108160908ND
2021-08-16CA2010007_002_002-202108160908ND
2021-08-16CA2010007_007_007-202108160808ND
2021-08-31CA2010007_028_028-202108311108ND
2021-11-08CA2010007_040_040-202111081001ND
2022-04-18CA2010007_047_047-202204181011ND
2022-04-18CA2010007_048_048-202204181024ND
2022-04-18CA2010007_046_046-202204180951ND
2022-07-20CA2010007_047_047-202207201027ND
2022-07-20CA2010007_046_046-202207201021ND
2022-07-20CA2010007_048_048-202207201033ND
2023-04-03CA2010007_033_033-202304031120ND
2023-04-03CA2010007_031_031-202304031106ND
2023-04-03CA2010007_032_032-202304031113ND
2023-04-03CA2010007_030_030-202304031055ND
2023-04-04CA2010007_017_017-202304041124ND
2023-04-05CA2010007_034_034-202304050856ND
2023-06-06CA2010007_013_013-202306061000ND
2023-06-06CA2010007_051_051-202306060820ND
2023-07-10CA2010007_030_030-202307100931ND
2023-07-10CA2010007_017_017-202307101111ND
2023-07-10CA2010007_032_032-202307101005ND
2023-07-10CA2010007_033_033-202307100953ND
2023-07-10CA2010007_034_034-202307100850ND
2023-07-12CA2010007_031_031-202307120845ND