Know Your Environment. Protect Your Health.

Atrazine

Otwell Water Corporation

NOTE: Otwell Water Corporation purchases water from Patoka Lake Regional Water which is required to test for atrazine. Sample information shown below was taken by Patoka Lake Regional Water.

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
20190.0750 ppb42ND - 0.200 ppb
2020ND40ND
2021ND10ND
2022ND50ND
2023ND50ND

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: Otwell Water Corporation purchases water from Patoka Lake Regional Water which is required to test for atrazine. Sample information shown below was taken by Patoka Lake Regional Water.

Date Lab ID Result
2018-02-14408975RS525-18010.1000 ppb
2018-05-16416929RS28-1802ND
2018-08-16426574RS28-18030.1000 ppb
2018-11-13435922RS-1804ND
2019-02-12443170RS525-1901ND
2019-05-13452059RS525-1902ND
2019-08-14462026RS525-19030.1000 ppb
2019-11-11470688RS525-19040.200 ppb
2020-02-12478343RS-2001ND
2020-05-124626102ND
2020-08-124698080ND
2020-11-094771608ND
2021-02-104832601ND
2021-05-114898972ND
2021-08-104980921ND
2021-08-184990896ND
2021-11-101-810-7353-1ND
2022-02-081-810-14164-6ND
2022-05-101-810-24180-1ND
2022-08-091-810-33419-1_INND
2022-08-161-810-34359-1_INND
2022-11-081-810-43880-1_INND
2023-02-141-810-53600-1_INND
2023-05-091-810-62557-1_INND
2023-08-081-810-73188-1_INND
2023-08-091-810-73252-1_INND
2023-11-071-810-84232-1_INND