Know Your Environment. Protect Your Health.

Simazine

West Monroe 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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019N/A00N/A
2020ND50ND
2021ND10ND
2022N/A00N/A
2023ND60ND

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
2018-07-1635405319001ND
2018-07-1635405319001ND
2020-02-1735531852001ND
2020-02-1735531852002ND
2020-08-1935572116001ND
2020-08-1935572116002ND
2020-08-1935572116003ND
2021-06-1535641332001ND
2023-06-2035808080001ND
2023-06-2035808080002ND
2023-06-2035808080003ND
2023-06-2635809317001ND
2023-06-2635809317002ND
2023-06-2635809317003ND