Know Your Environment. Protect Your Health.

Simazine

Port Sulphur Water District

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND80ND
2020ND40ND
20210.0445 ppb42ND - 0.0910 ppb
20220.0750 ppb21ND - 0.150 ppb
20230.0625 ppb41ND - 0.250 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
2018-04-1735386954001ND
2018-04-1735386954001ND
2018-10-0235421762001ND
2018-10-0235421762001ND
2019-02-0535446733001ND
2019-02-0535446733001ND
2019-05-3035472024001ND
2019-05-3035472024001ND
2019-08-1435490419001ND
2019-08-1435490419001ND
2019-10-0835503647001ND
2019-10-0835503647001ND
2020-03-1035536681001ND
2020-03-1835538502001ND
2020-10-2635587643001ND
2020-11-1835593410001ND
2021-03-01356157320010.0870 ppb
2021-03-01356157340010.0910 ppb
2021-09-1335663084001ND
2021-10-2635673864001ND
2022-01-13356907640010.150 ppb
2022-08-0435737246001ND
2023-02-01357771770010.250 ppb
2023-10-0335831861001ND
2023-10-0535832714001ND
2023-10-1135834155001ND