Know Your Environment. Protect Your Health.

Simazine

Blissfield

Simazine is a hormone-disrupting herbicide related to atrazine. It affects the male and female reproductive systems. In studies of laboratory animals, simazine increases blood levels of estrogen, decreases prolactin and progesterone, and causes mammary and ovarian tumors.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND50ND
2021ND40ND
2022ND40ND
2023ND40ND

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 simazine 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): 4 ppb

The legal limit for simazine, established in 1992, was based on toxicity studies 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
2018-03-20LLH71897ND
2018-05-08LLH79573ND
2018-08-08LLH98017ND
2018-10-09LLI10732ND
2019-03-19LLI29969ND
2019-06-30LLI47602ND
2019-09-04LLI61622ND
2019-10-16LLI71184ND
2020-02-04ND
2020-05-14ND
2020-08-18ND
2020-08-18ND
2020-11-09ND
2021-02-10ND
2021-05-11ND
2021-08-10ND
2021-11-15ND
2022-03-08ND
2022-06-14ND
2022-09-19ND
2022-12-12ND
2023-03-07ND
2023-06-12ND
2023-09-11ND
2023-12-11ND