Know Your Environment. Protect Your Health.

Simazine

Western Cass Water Supply Corporation

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND10ND
2020ND50ND
2021ND50ND
2022ND10ND
2023ND20ND

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
2018-03-08Q1809687012ND
2018-03-08Q1809687013ND
2018-03-08Q1809687014ND
2018-03-08Q1809687015ND
2018-03-08Q1809687011ND
2019-05-02Q1918236011ND
2020-03-19Q2011997015ND
2020-04-21Q2015767019ND
2020-04-21Q2015767038ND
2020-07-28Q2029440007ND
2020-12-03Q2048488001ND
2021-10-25Q2129911001ND
2021-10-25Q2129911002ND
2021-10-25Q2129911003ND
2021-10-25Q2129911004ND
2021-10-25Q2129911005ND
2022-11-16Q2234548003ND
2023-08-01Q2331111001ND
2023-08-01Q2331111010ND