Know Your Environment. Protect Your Health.

Atrazine

City of Alexandria Water System

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.

 

147

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND900ND
2020ND50ND
2021ND40ND
2022ND370ND
2023ND110ND

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
2019-01-3035445470001ND
2019-01-3035445470002ND
2019-01-3035445470003ND
2019-01-3035445470004ND
2019-01-3035445470005ND
2019-01-3035445470001ND
2019-01-3035445470002ND
2019-01-3035445470003ND
2019-01-3035445470004ND
2019-01-3035445470005ND
2019-02-0635446987001ND
2019-02-0635446987002ND
2019-02-0635446987003ND
2019-02-0635446987004ND
2019-02-0635446987005ND
2019-02-0635446987001ND
2019-02-0635446987002ND
2019-02-0635446987003ND
2019-02-0635446987004ND
2019-02-0635446987005ND
2019-02-2735451250001ND
2019-02-2735451250002ND
2019-02-2735451250003ND
2019-02-2735451250004ND
2019-02-2735451250005ND
2019-02-2735451250001ND
2019-02-2735451250002ND
2019-02-2735451250003ND
2019-02-2735451250004ND
2019-02-2735451250005ND
2019-03-1335454676001ND
2019-03-1335454676002ND
2019-03-1335454676003ND
2019-03-1335454676004ND
2019-03-1335454676001ND
2019-03-1335454676002ND
2019-03-1335454676003ND
2019-03-1335454676004ND
2019-03-2035456260001ND
2019-03-2035456260002ND
2019-03-2035456260003ND
2019-03-2035456260004ND
2019-03-2035456260005ND
2019-03-2035456260001ND
2019-03-2035456260002ND
2019-03-2035456260003ND
2019-03-2035456260004ND
2019-03-2035456260005ND
2019-03-2735457693001ND
2019-03-2735457693002ND
2019-03-2735457693003ND
2019-03-2735457693004ND
2019-03-2735457693005ND
2019-03-2735457693001ND
2019-03-2735457693002ND
2019-03-2735457693003ND
2019-03-2735457693004ND
2019-03-2735457693005ND
2019-04-1035461050001ND
2019-04-1035461050002ND
2019-04-1035461050003ND
2019-04-1035461050004ND
2019-04-1035461050005ND
2019-04-1035461050001ND
2019-04-1035461050002ND
2019-04-1035461050003ND
2019-04-1035461050004ND
2019-04-1035461050005ND
2019-06-0635473878001ND
2019-06-0635473878002ND
2019-06-0635473878003ND
2019-06-0635473878001ND
2019-06-0635473878002ND
2019-06-0635473878003ND
2019-09-1135497727001ND
2019-09-1135497727002ND
2019-09-1135497727003ND
2019-09-1135497727001ND
2019-09-1135497727002ND
2019-09-1135497727003ND
2019-12-0435516733001ND
2019-12-0435516733002ND
2019-12-0435516733003ND
2019-12-0435516733004ND
2019-12-0435516733005ND
2019-12-0435516733001ND
2019-12-0435516733002ND
2019-12-0435516733003ND
2019-12-0435516733004ND
2019-12-0435516733005ND
2020-03-2635539990001ND
2020-03-2635539990002ND
2020-06-1735557855001ND
2020-06-1735557855002ND
2020-11-0935590775001ND
2021-01-2635607688001ND
2021-05-0535631373001ND
2021-07-1435647771001ND
2021-08-1035655454001ND
2022-01-0435689594001ND
2022-01-0435689594002ND
2022-01-0435689594003ND
2022-01-1935691868001ND
2022-01-1935691868002ND
2022-01-1935691868003ND
2022-01-1935691868004ND
2022-01-1935691868005ND
2022-02-0235694848001ND
2022-02-0235694848002ND
2022-02-0235694848003ND
2022-02-0235694848004ND
2022-02-0235694848005ND
2022-02-2335699545001ND
2022-02-2335699545002ND
2022-02-2335699545003ND
2022-02-2335699545004ND
2022-02-2335699545005ND
2022-03-0935703385001ND
2022-03-0935703385002ND
2022-03-0935703385003ND
2022-03-0935703385004ND
2022-03-1635704974001ND
2022-03-1635704974002ND
2022-03-1635704974003ND
2022-03-1635704974004ND
2022-03-1635704974005ND
2022-07-1835733720001ND
2022-07-1835733720002ND
2022-07-1835733720003ND
2022-07-1835733720004ND
2022-07-1835733720005ND
2022-07-1835733720006ND
2022-09-1335747194001ND
2022-09-1335747194002ND
2022-11-3035763531001ND
2022-11-3035763531002ND
2023-02-0635778643001ND
2023-02-0635778643002ND
2023-05-3035803597001ND
2023-05-3035803597002ND
2023-05-3035803597003ND
2023-07-3135817947001ND
2023-07-3135817947002ND
2023-07-3135817947003ND
2023-11-2735844910001ND
2023-11-2735844910002ND
2023-11-2735844910003ND