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EWG's Tap Water Database — 2021 UPDATE

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Simazine

Midwest City

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.

MORE ABOUT THIS CONTAMINANT

 

70

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015ND40ND
2016N/A00N/A
2017N/A00N/A
2018ND420ND
2019ND240ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2015-03-12542764ND
2015-03-12542763ND
2015-07-02545220ND
2015-07-02545219ND
2018-03-26AC27032-05ND
2018-03-26AC27032-01ND
2018-03-26AC27032-02ND
2018-03-26AC27032-03ND
2018-03-26AC27032-04ND
2018-03-26AC27032-06ND
2018-03-26AC27032-07ND
2018-03-26AC27032-08ND
2018-03-26AC27032-09ND
2018-06-18AF19074-08ND
2018-06-18AF19074-01ND
2018-06-18AF19074-02ND
2018-06-18AF19074-03ND
2018-06-18AF19074-04ND
2018-06-18AF19074-05ND
2018-06-18AF19074-06ND
2018-06-18AF19074-07ND
2018-06-18AF19074-09ND
2018-06-18AF19074-10ND
2018-06-18AF19074-11ND
2018-08-21AH22077-10ND
2018-08-21AH22077-09ND
2018-08-21AH22077-08ND
2018-08-21AH22077-07ND
2018-08-21AH22077-06ND
2018-08-21AH22077-05ND
2018-08-21AH22077-04ND
2018-08-21AH22077-03ND
2018-08-21AH22077-02ND
2018-08-21AH22077-01ND
2018-09-04AI05090-01RE1ND
2018-10-29AJ30053-05ND
2018-10-29AJ30052-01ND
2018-10-29AJ30052-02ND
2018-10-29AJ30052-03ND
2018-10-29AJ30052-04ND
2018-10-29AJ30052-05ND
2018-10-29AJ30052-06ND
2018-10-29AJ30053-01ND
2018-10-29AJ30053-02ND
2018-10-29AJ30053-03ND
2018-10-29AJ30053-04ND
2019-01-15BA15045-01ND
2019-02-25BB26050-08ND
2019-02-25BB26050-01ND
2019-02-25BB26050-02ND
2019-02-25BB26050-03ND
2019-02-25BB26050-04ND
2019-02-25BB26050-05ND
2019-02-25BB26050-06ND
2019-02-25BB26050-07ND
2019-02-25BB26050-09ND
2019-02-25BB26050-10ND
2019-02-25BB26050-11ND
2019-02-25BB26059-01ND
2019-10-28BJ29019-10ND
2019-10-28BJ29019-09ND
2019-10-28BJ29019-08ND
2019-10-28BJ29019-07ND
2019-10-28BJ29019-06ND
2019-10-28BJ29019-05ND
2019-10-28BJ29019-04ND
2019-10-28BJ29019-03ND
2019-10-28BJ29019-02ND
2019-10-28BJ29019-01ND
2019-12-09BL10033-01ND