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EWG's Tap Water Database — 2019 UPDATE

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Simazine

City of Hereford

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
2012ND10ND
2013ND20ND
2014ND20ND
2015ND20ND
2016ND40ND
2017ND30ND

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
2012-05-30AB91356ND
2013-05-28Q1301569014ND
2013-05-28Q1301569005ND
2014-02-12Q1404321007ND
2014-02-12Q1404321006ND
2015-01-29Q1503619010ND
2015-01-29Q1503619009ND
2016-02-10Q1605969006ND
2016-02-10Q1605969005ND
2016-03-17Q1611196006ND
2016-03-17Q1611196005ND
2017-01-17Q1702053001ND
2017-04-10Q1714723003ND
2017-05-09Q1718998003ND