Know Your Environment. Protect Your Health.

Simazine

City of Coeur D Alene

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND20ND
2021N/A00N/A
2022ND240ND
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
2020-03-24S202003037301ND
2020-09-09S202009019001ND
2022-03-22S202203039801ND
2022-04-26S2022040442ND
2022-04-26S202204048801ND
2022-04-27S2022040521ND
2022-04-27S2022040518ND
2022-04-27S202204052401ND
2022-04-28S2022040550ND
2022-04-28S2022040547ND
2022-05-02S202205003101ND
2022-05-02S202205002601ND
2022-05-02S202205001401ND
2022-05-02S202205000801ND
2022-07-12202207030710ND
2022-07-12202207030709ND
2022-07-12S202207030708ND
2022-07-12S202207030707ND
2022-07-12S202207030706ND
2022-07-12S202207030705ND
2022-07-12S202207030704ND
2022-07-12S202207030703ND
2022-07-12S202207030702ND
2022-07-12S202207030701ND
2022-07-12S202207029501ND
2022-10-31S2022100642ND
2023-02-13S202302019701ND