Know Your Environment. Protect Your Health.

Simazine

Pa Amer Water Company Montrose

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)

16

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
20200.243 ppb330.210 ppb - 0.280 ppb
20210.353 ppb440.200 ppb - 0.520 ppb
20220.383 ppb440.270 ppb - 0.490 ppb
20230.222 ppb550.200 ppb - 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
2020-05-1122248761.000.240 ppb
2020-08-1722831382.000.280 ppb
2020-11-2323390724.000.210 ppb
2021-02-1023917054.000.200 ppb
2021-05-1724472616.000.440 ppb
2021-08-0325055172.000.250 ppb
2021-11-0825616621.000.520 ppb
2022-02-0926145390.000.360 ppb
2022-05-0526682174.000.490 ppb
2022-08-1827269069.000.410 ppb
2022-11-0227852865.000.270 ppb
2023-02-1428378180.000.220 ppb
2023-05-1728935165.000.240 ppb
2023-06-0529142180.000.200 ppb
2023-08-0729531964.000.200 ppb
2023-11-1530101646.000.250 ppb