Know Your Environment. Protect Your Health.

Simazine

Beauregard Water Works District #3

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.

 

43

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND220ND
2019N/A00N/A
2020N/A00N/A
2021ND110ND
2022N/A00N/A
2023ND100ND

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
2018-02-2735377534001ND
2018-02-2735377534001ND
2018-03-1935381349005ND
2018-03-1935381349004ND
2018-03-1935381349003ND
2018-03-1935381349001ND
2018-03-1935381349002ND
2018-03-1935381349003ND
2018-03-1935381349004ND
2018-03-1935381349005ND
2018-03-1935381349002ND
2018-03-1935381349001ND
2018-04-1635387317002ND
2018-04-1635387317005ND
2018-04-1635387317003ND
2018-04-1635387317002ND
2018-04-1635387317001ND
2018-04-1635387317005ND
2018-04-1635387317004ND
2018-04-1635387317003ND
2018-04-1635387317001ND
2018-04-1635387317004ND
2021-02-0235609370004ND
2021-02-0235609370003ND
2021-02-0235609370002ND
2021-02-0235609370001ND
2021-03-1635619951005ND
2021-03-1635619951004ND
2021-03-1635619951003ND
2021-03-1635619951002ND
2021-03-1635619951001ND
2021-04-2735629422002ND
2021-04-2735629422001ND
2023-07-2435815844001ND
2023-07-2435815844002ND
2023-07-2435815844003ND
2023-07-2435815844004ND
2023-07-2435815844005ND
2023-08-0735819580001ND
2023-08-0735819580003ND
2023-08-0735819580004ND
2023-08-0735819580005ND
2023-08-0735819580006ND