Know Your Environment. Protect Your Health.

Simazine

Gretna Waterworks

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)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND20ND
20210.0325 ppb21ND - 0.0650 ppb
20220.0600 ppb21ND - 0.120 ppb
20230.215 ppb21ND - 0.430 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
2018-04-1735386954003ND
2018-04-1735386954003ND
2018-10-0235421766001ND
2018-10-0235421766001ND
2019-02-0535446730001ND
2019-02-0535446730001ND
2019-08-1435490413001ND
2019-08-1435490413001ND
2020-03-1835538511001ND
2020-10-2635587648001ND
2021-03-01356157310010.0650 ppb
2021-12-0835683666002ND
2022-01-13356907610010.120 ppb
2022-08-0435737249001ND
2023-02-01357771800010.430 ppb
2023-10-1135834160001ND