Know Your Environment. Protect Your Health.

Simazine

Maysville PWS

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
2018-02-12AD14804ND
2018-05-07AD20807ND
2018-08-06AD31581ND
2018-11-08AD36090ND
2019-02-27AD39892ND
2019-05-20AD47774ND
2019-08-12AD54365ND
2019-11-12AD58390ND
2020-02-182001324ND
2020-05-112008639ND
2020-09-232012974ND
2020-11-232017815ND
2021-02-232100456ND
2021-05-192110704ND
2021-08-252115053ND
2021-11-222119294ND
2022-02-222201750ND
2022-05-242211322ND
2022-08-152216013ND
2022-11-282220955ND
2023-02-222300374ND
2023-05-222307859ND
2023-08-222313074ND