Know Your Environment. Protect Your Health.

Simazine

City of Mountain Home

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.

 

40

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND70ND
2020N/A00N/A
2021ND130ND
2022ND180ND
2023ND10ND

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
2018-08-01S1836908ND
2019-06-11S1927642ND
2019-06-11S1927641ND
2019-07-25S1936441ND
2019-07-25S1936442ND
2019-07-25S1936443ND
2019-07-25S1936446ND
2019-12-03S1960165ND
2021-09-09S2147367ND
2021-09-09S2147369ND
2021-09-09S2147371ND
2021-09-22S2150231ND
2021-10-14S2155146ND
2021-10-20S2156407ND
2021-10-20S2156403ND
2021-10-20S2156406ND
2021-10-20S2156401ND
2021-10-20S2156405ND
2021-10-20S2156408ND
2021-10-20S2156402ND
2021-10-20S2156404ND
2022-02-24S2209172ND
2022-02-24S2209173ND
2022-02-24S2209171ND
2022-02-24S2209169ND
2022-02-24S2209174ND
2022-05-11S2222518ND
2022-05-11S2222541ND
2022-06-06SMCF0683-05ND
2022-07-20S2234918ND
2022-07-20S2234917ND
2022-10-19S2252295ND
2022-10-19S2252291ND
2022-10-19S2252293ND
2022-10-19S2252294ND
2022-10-19S2252296ND
2022-10-19S2252297ND
2022-10-19S2252298ND
2022-10-19S2252299ND
2023-03-21SMDC0635-01ND