Know Your Environment. Protect Your Health.

Simazine

Bryan County Rural Water, Sewer & Solid Waste Management District #2

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND50ND
20200.0267 ppb31ND - 0.0800 ppb
20210.0300 ppb52ND - 0.0800 ppb
2022ND40ND
20230.0600 ppb41ND - 0.240 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
2018-08-2918081323ND
2018-12-191812500ND
2019-02-061902151ND
2019-03-131903384ND
2019-04-171904501ND
2019-09-181909634ND
2019-12-181912629ND
2020-02-1920025120.0800 ppb
2020-07-22102000-01ND
2020-10-21103377-01ND
2021-02-17104910-01ND
2021-03-17105439-010.0800 ppb
2021-04-21105920-01ND
2021-07-14107198-010.0700 ppb
2021-12-15109504-01ND
2022-01-12109841-01ND
2022-04-26111338-01ND
2022-07-20112533-01ND
2022-10-19113945-01ND
2023-01-04114931-01ND
2023-04-05116303-010.240 ppb
2023-07-12117946-01ND
2023-10-04119263-01ND