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EWG's Tap Water Database — 2019 UPDATE

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Simazine

City of Wichita Falls

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND20ND
2014ND30ND
2015ND40ND
2016ND10ND
2017ND10ND

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
2012-03-271203944002ND
2012-05-161205609003ND
2012-05-161205609004ND
2012-09-121209458001ND
2013-03-261303A43005ND
2013-03-261303A43006ND
2014-05-13Q1415816001ND
2014-08-14Q1436796020ND
2014-11-12AC71871ND
2015-02-09Q1505019004ND
2015-02-09Q1505019003ND
2015-05-11Q1517193001ND
2015-09-22Q1537019001ND
2016-02-01Q1604190001ND
2017-08-07Q1733093006ND