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EWG's Tap Water Database — 2019 UPDATE

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Simazine

Rockford

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.

 

45

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND30ND
2014ND160ND
2015ND20ND
2016ND30ND
2017ND160ND

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
2012-01-242012864-02ND
2012-03-222032563-01ND
2012-03-222032567-01ND
2012-03-222032563-02ND
2012-05-152052166-02ND
2013-03-123031609-01ND
2013-06-253063688-01ND
2013-06-253063688-01RE1ND
2014-01-224012700-01ND
2014-01-224012700-02ND
2014-01-274013503-02ND
2014-01-284013503-01ND
2014-02-184022289-01ND
2014-02-184022291-01ND
2014-03-254033199-01ND
2014-04-214043529-02ND
2014-04-214043529-04ND
2014-04-214043529-05ND
2014-04-224043529-03ND
2014-04-224043529-06ND
2014-04-234043529-01RE1ND
2014-04-294044304-01ND
2014-10-284104356-01ND
2014-12-314123868-01ND
2015-02-065021724-01ND
2015-05-065050848-01RE1ND
2016-01-066010756-01ND
2016-04-136042243-01ND
2016-12-146122211-01ND
2017-01-067011622-01RE1ND
2017-01-137012600-01ND
2017-01-137012603-01ND
2017-01-207013468-01ND
2017-03-017030228-01ND
2017-03-087031384-01ND
2017-06-027061425-03ND
2017-06-027061425-01ND
2017-06-097062750-02ND
2017-06-097062750-05ND
2017-06-097062750-03ND
2017-06-097062750-01ND
2017-06-287065205-03ND
2017-06-287065205-01ND
2017-08-047082231-01ND
2017-12-067121184-03ND