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EWG's Tap Water Database — 2019 UPDATE

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Simazine

Jordan Valley Water Conservancy 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.

 

41

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND50ND
2014ND50ND
2015ND50ND
2016ND50ND
2017ND190ND

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 Result
2012-07-18ND
2012-12-12ND
2013-06-26ND
2013-06-26ND
2013-08-27ND
2013-10-29ND
2013-10-29ND
2014-01-02ND
2014-06-03ND
2014-06-04ND
2014-06-04ND
2014-07-15ND
2015-01-13ND
2015-02-11ND
2015-02-26ND
2015-07-07ND
2015-07-21ND
2016-01-06ND
2016-02-16ND
2016-04-05ND
2016-04-25ND
2016-07-18ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-04ND
2017-01-04ND
2017-01-04ND
2017-01-04ND
2017-01-23ND
2017-01-23ND
2017-03-23ND
2017-04-11ND
2017-04-12ND
2017-05-03ND
2017-06-07ND
2017-06-08ND
2017-07-10ND
2017-07-12ND
2017-08-14ND