Know Your Environment. Protect Your Health.

Simazine

Kinkaid Area Water System

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)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0450 ppb42ND - 0.0900 ppb
20190.0900 ppb43ND - 0.140 ppb
20200.0325 ppb41ND - 0.130 ppb
20210.0975 ppb440.0700 ppb - 0.170 ppb
20220.0200 ppb41ND - 0.0800 ppb
20230.0250 ppb41ND - 0.1000 ppb

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
2018-01-08383096010.0900 ppb
2018-04-0339166401ND
2018-07-1740400501ND
2018-10-02414685010.0900 ppb
2019-01-07424719010.0800 ppb
2019-04-0143604701ND
2019-07-01453108010.140 ppb
2019-10-14467976010.140 ppb
2020-01-06481868010.130 ppb
2020-04-1449234801ND
2020-08-1050678801ND
2020-10-1352130301ND
2021-01-11532165010.0800 ppb
2021-04-06539764010.170 ppb
2021-07-19551497010.0700 ppb
2021-10-11564156010.0700 ppb
2022-01-25572551010.0800 ppb
2022-04-1158282201ND
2022-07-1159496601ND
2022-10-0360754601ND
2023-01-03618037010.1000 ppb
2023-04-1162437701ND
2023-07-1066807901ND
2023-10-2468178801ND