Know Your Environment. Protect Your Health.

Simazine

Friona Municipal Water System

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020ND20ND
2021ND30ND
2022ND20ND
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

Date Lab ID Result
2018-01-16Q1801773006ND
2018-01-16Q1801773007ND
2018-07-30Q1830046005ND
2019-01-17Q1902751005ND
2019-01-17Q1902751006ND
2019-04-23Q1916176005ND
2020-01-15Q2001626009ND
2020-01-15Q2001626010ND
2021-01-13Q2100884001ND
2021-01-13Q2100884006ND
2021-04-08Q2109054003ND
2022-01-11Q2200809002ND
2022-07-12Q2219520003ND
2023-02-16Q2306631006ND