Know Your Environment. Protect Your Health.

Simazine

Northfield

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND60ND
2020ND50ND
2021ND50ND
2022ND40ND
2023ND40ND

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
2018-10-2218J1084-01ND
2019-01-1819A0676-01ND
2019-01-1819A0676-02ND
2019-01-1819A0676-03ND
2019-06-2019F1478-02ND
2019-06-2019F1478-03ND
2019-07-2519G1899-01ND
2020-07-0820G0398-01ND
2020-10-2720J1404-01ND
2020-10-2720J1405-02ND
2020-10-2720J1405-03ND
2020-10-2720J1405-04ND
2021-02-2521B1431-01ND
2021-02-2521B1431-04ND
2021-02-2521B1431-03ND
2021-02-2521B1431-02ND
2021-05-1121E0572-01ND
2022-02-0822B0561-01ND
2022-02-0822B0561-02ND
2022-05-0522E0381-01ND
2022-05-0522E0381-02ND
2023-05-0923E0759-02ND
2023-05-0923E0759-04ND
2023-08-0723H0555-01ND
2023-08-0723H0555-02ND