Know Your Environment. Protect Your Health.

Simazine

Sunbelt Fresh Water Supply District High Meadows Subdivision

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020ND40ND
20210.0260 ppb52ND - 0.0700 ppb
20220.105 ppb21ND - 0.210 ppb
2023ND20ND

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
2018-01-29AE11355ND
2018-01-29AE11356ND
2018-01-29AE11352ND
2019-07-02AE73256ND
2019-07-02AE73257ND
2019-07-02AE73258ND
2020-09-15AF27439ND
2020-09-24AF28511ND
2020-10-14AF30693ND
2020-11-24AF35734ND
2021-02-03AF425340.0700 ppb
2021-02-03AF42535ND
2021-06-09AF57269ND
2021-08-18AF66955ND
2021-10-14Q21289040010.0600 ppb
2022-01-26AF820240.210 ppb
2022-01-26AF82030ND
2023-03-07AG31978ND
2023-05-03AG39232ND