Know Your Environment. Protect Your Health.

Simazine

Bossier City 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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND20ND
2021ND20ND
2022ND20ND
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
2018-01-2335370031001ND
2018-01-2335370031001ND
2018-07-3135408509001ND
2018-07-3135408509001ND
2019-02-2535450969001ND
2019-02-2535450969001ND
2019-07-3135486402001ND
2019-07-3135486402001ND
2020-03-1635538194001ND
2020-08-1135569893001ND
2021-02-0335609510001ND
2021-08-0535653536002ND
2022-01-2735693462008ND
2022-07-2735735463001ND
2023-01-3035776976002ND
2023-08-1535821480001ND