Know Your Environment. Protect Your Health.

Atrazine

Crestview Mutual Water Company

NOTE: Crestview Mutual Water Company purchases water from Calleguas Municipal Water District which is required to test for atrazine. Sample information shown below was taken by Calleguas Municipal Water District.

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.

 

50

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND90ND
2019ND80ND
2020ND10ND
2021ND80ND
2022ND90ND
2023ND70ND

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: Crestview Mutual Water Company purchases water from Calleguas Municipal Water District which is required to test for atrazine. Sample information shown below was taken by Calleguas Municipal Water District.

Date Lab ID Result
2018-02-13CA5610050_015_015-201802131050ND
2018-02-13CA5610050_016_016-201802130945ND
2018-02-26CA5610050_004_004-201802260915ND
2018-03-07CA5610050_013_013-201803071320ND
2018-03-08CA5610050_012_012-201803081000ND
2018-03-08CA5610050_014_014-201803081330ND
2018-03-22CA5610050_001_001-201803221045ND
2018-04-30CA5610050_017_017-201804301030ND
2018-11-05CA5610050_004_004-201811050820ND
2019-01-29CA5610050_004_004-201901290930ND
2019-02-04CA5610050_018_018-201902040945ND
2019-02-05CA5610050_023_023-201902050945ND
2019-02-05CA5610050_022_022-201902051020ND
2019-02-07CA5610050_020_020-201902070840ND
2019-02-11CA5610050_021_021-201902110930ND
2019-02-19CA5610050_019_019-201902191100ND
2019-11-04CA5610050_004_004-201911040800ND
2020-01-07CA5610050_008_008-202001071030ND
2020-01-30CA5610050_001_001-202001300945ND
2020-01-30CA5610050_004_004-202001300930ND
2020-02-03CA5610050_011_011-202002030945ND
2020-02-10CA5610050_006_006-202002101005ND
2020-02-10CA5610050_009_009-202002101145ND
2020-02-12CA5610050_007_007-202002121153ND
2020-02-12CA5610050_010_010-202002121110ND
2020-11-04CA5610050_004_004-202011040830ND
2021-02-10CA5610050_015_015-202102100830ND
2021-02-11CA5610050_001_001-202102110820ND
2021-02-11CA5610050_004_004-202102110920ND
2021-02-17CA5610050_012_012-202102171000ND
2021-02-17CA5610050_017_017-202102171100ND
2021-02-19CA5610050_013_013-202102191040ND
2021-02-22CA5610050_016_016-202102221117ND
2021-02-23CA5610050_014_014-202102231000ND
2022-01-03CA5610050_001_001-202201030846ND
2022-01-03CA5610050_004_004-202201030920ND
2022-01-04CA5610050_019_019-202201040850ND
2022-01-06CA5610050_023_023-202201060920ND
2022-01-13CA5610050_020_020-202201130950ND
2022-01-19CA5610050_022_022-202201191200ND
2022-01-19CA5610050_018_018-202201191115ND
2022-09-28CA5610050_021_021-202209281005ND
2022-09-28CA5610050_021_021-202209281005ND
2023-03-15CA5610050_001_001-202303150945ND
2023-03-15CA5610050_004_004-202303150900ND
2023-03-21CA5610050_008_008-202303211100ND
2023-03-21CA5610050_006_006-202303211000ND
2023-03-22CA5610050_009_009-202303221140ND
2023-03-23CA5610050_007_007-202303230830ND
2023-09-21CA5610050_010_010-202309211250ND