Know Your Environment. Protect Your Health.

Simazine

City of Chubbuck

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND90ND
2020ND10ND
2021ND30ND
2022N/A00N/A
2023N/A00N/A

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
2018-02-21SI80212801ND
2019-03-28SI90320401ND
2019-04-10SI90408601ND
2019-06-04SI90604901ND
2019-07-10SI90712501ND
2019-07-24SI90732001ND
2019-07-25SI90734601ND
2019-09-04SI90903501ND
2019-10-31SI91031701ND
2019-11-05SI91102401ND
2020-02-05SI00202601ND
2021-02-23SI10214702ND
2021-02-23SI10214701ND
2021-03-16SI10311101ND