Know Your Environment. Protect Your Health.

Simazine

Quint-mar 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.

 

24

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
2019ND100ND
2020ND20ND
2021N/A00N/A
2022ND100ND
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

Date Lab ID Result
2019-02-05AB32809ND
2019-02-05AB32810ND
2019-02-05AB32811ND
2019-02-05AB32808ND
2019-04-17AB34287ND
2019-07-17AB36908-1ND
2019-07-17AB36909ND
2019-07-17AB36910ND
2019-07-17AB36911ND
2019-07-17AB36912ND
2020-07-20AB43481ND
2020-11-05AB46358ND
2022-02-08AB56151ND
2022-02-08AB56155ND
2022-02-08AB56154ND
2022-02-08AB56153ND
2022-02-08AB56152ND
2022-07-20AB60396ND
2022-07-20AB60397ND
2022-07-20AB60398ND
2022-07-20AB60399ND
2022-07-20AB60400ND
2023-02-06AB65254ND
2023-07-17AB69865ND