Know Your Environment. Protect Your Health.

Simazine

Navarro Mills Water Supply Corporation

NOTE: Navarro Mills Water Supply Corporation purchases water from City of Corsicana which is required to test for simazine. Sample information shown below was taken by City of Corsicana.

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND20ND
2021ND10ND
2022ND20ND
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

NOTE: Navarro Mills Water Supply Corporation purchases water from City of Corsicana which is required to test for simazine. Sample information shown below was taken by City of Corsicana.

Date Lab ID Result
2018-01-31Q1803716001ND
2018-01-31Q1803716007ND
2019-01-10Q1901447002ND
2019-01-10Q1901447009ND
2020-01-23Q2002752001ND
2020-01-29Q2003549001ND
2021-01-14Q2101046001ND
2021-01-14Q2101046002ND
2022-06-20Q2216942001ND
2022-06-20Q2216942002ND
2023-02-09Q2305193003ND
2023-02-09Q2305193004ND