Know Your Environment. Protect Your Health.

Simazine

Water Works District #1 of Vermilion

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
2019ND20ND
2020ND60ND
2021N/A00N/A
2022ND10ND
2023ND60ND

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
2018-04-0235383761001ND
2018-04-0235383761002ND
2018-04-0235383761003ND
2018-04-0235383761004ND
2018-04-0235383761001ND
2018-04-0235383761002ND
2018-04-0235383761003ND
2018-04-0235383761004ND
2019-06-1035474976001ND
2019-06-1035474976001ND
2020-06-1035556215004ND
2020-06-1035556215001ND
2020-06-1035556215002ND
2020-06-1035556215003ND
2020-10-0535583034002ND
2020-10-0535583034001ND
2022-07-2535735487001ND
2023-03-2735788777001ND
2023-03-2735788777002ND
2023-03-2735788779001ND
2023-03-2735788779002ND
2023-07-1035812353001ND
2023-07-1035812353002ND