Know Your Environment. Protect Your Health.

Simazine

Tryon Road Special Utility District

NOTE: Tryon Road Special Utility District purchases water from Northeast Texas Municipal Water District which is required to test for simazine. Sample information shown below was taken by Northeast Texas Municipal Water District.

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND10ND
2020ND10ND
2021ND30ND
2022ND10ND
2023ND10ND

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: Tryon Road Special Utility District purchases water from Northeast Texas Municipal Water District which is required to test for simazine. Sample information shown below was taken by Northeast Texas Municipal Water District.

Date Lab ID Result
2018-05-23Q1820769001ND
2019-02-25Q1907904006ND
2020-02-26Q2007390001ND
2021-02-09Q2103854001ND
2022-03-01Q2206887001ND
2023-01-18Q2302651004ND