Know Your Environment. Protect Your Health.

Simazine

New Orleans Carrollton 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.

 

38

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
2019ND100ND
2020ND50ND
20210.0370 ppb63ND - 0.0750 ppb
20220.0465 ppb63ND - 0.0960 ppb
2023ND30ND

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
2018-03-1535380391002ND
2018-03-1535380391001ND
2018-03-1535380391001ND
2018-03-1535380391002ND
2018-08-1535411633001ND
2018-08-1535411633002ND
2018-08-1535411633002ND
2018-08-1535411633001ND
2019-02-2735451097001ND
2019-02-2735451098001ND
2019-02-2735451098001ND
2019-02-2735451097001ND
2019-08-0135486661001ND
2019-08-0135486665001ND
2019-08-0135486661001ND
2019-08-0135486665001ND
2019-09-1935499418001ND
2019-09-1935499418001ND
2020-03-2635540032001ND
2020-03-2635540029001ND
2020-10-0835583701001ND
2020-10-0835583691001ND
2020-10-0835583702001ND
2021-03-29356223070010.0730 ppb
2021-03-29356223090010.0740 ppb
2021-03-29356223130010.0750 ppb
2021-10-1435671090001ND
2021-10-1435671094001ND
2021-10-1435671099001ND
2022-03-15357047090010.0920 ppb
2022-03-15357047070010.0960 ppb
2022-03-15357047060010.0910 ppb
2022-10-1335753419001ND
2022-10-1335753422001ND
2022-10-1335753420001ND
2023-03-0635783931001ND
2023-03-0635783938001ND
2023-03-0635783939001ND