Know Your Environment. Protect Your Health.

Simazine

Clarence Cannon Wholesale Water Commission

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
2018ND40ND
2019ND40ND
2020ND40ND
2021ND40ND
2022ND40ND
2023ND30ND

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
2018-02-19AD14829ND
2018-05-14AD20834ND
2018-08-06AD31592ND
2018-11-21AD36115ND
2019-03-04AD39917ND
2019-05-28AD47801ND
2019-08-20AD54390ND
2019-11-18AD58415ND
2020-02-202001419ND
2020-05-262008846ND
2020-08-242013072ND
2020-11-182017968ND
2021-02-232100616ND
2021-05-252110888ND
2021-08-252115230ND
2021-11-222119454ND
2022-02-222201910ND
2022-05-242211507ND
2022-09-072216191ND
2022-12-062221109ND
2023-03-072300531ND
2023-05-252308078ND
2023-08-272313254ND