Know Your Environment. Protect Your Health.

Simazine

City of Rochester

NOTE: City of Rochester purchases water from North Central Texas Municipal Water Authority which is required to test for simazine. Sample information shown below was taken by North Central Texas Municipal Water Authority.

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND10ND
2020ND20ND
2021ND50ND
2022ND10ND
2023ND20ND

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

NOTE: City of Rochester purchases water from North Central Texas Municipal Water Authority which is required to test for simazine. Sample information shown below was taken by North Central Texas Municipal Water Authority.

Date Lab ID Result
2018-02-13Q1806366001ND
2018-02-13Q1806366002ND
2018-05-15Q1819778002ND
2019-03-07Q1909867007ND
2020-03-17Q2011709001ND
2020-03-17Q2011709002ND
2021-03-01Q2105128001ND
2021-05-18Q2112967001ND
2021-08-24Q2122978001ND
2021-08-24Q2122978004ND
2021-12-09Q2134685001ND
2022-03-02Q2207242001ND
2022-09-07Q2226614010ND
2023-03-08Q2309188007ND
2023-09-05Q2338005001ND