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EWG's Tap Water Database — 2019 UPDATE

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Simazine

Town of Gilbert

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.

 

67

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND170ND
2013ND160ND
2014ND20ND
2015ND230ND
2016ND70ND
2017ND20ND

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
2012-01-18PVA1140-01ND
2012-01-18PVA1134-01ND
2012-02-28PVB1867-01CND
2012-03-01PVC0073-01CND
2012-03-15PVC1257-01SND
2012-04-02PVD0064-01SND
2012-04-09PVD0611-01SND
2012-04-18PVD1294-01AND
2012-05-02PVE0219-01SND
2012-07-02PVG0068-01CND
2012-07-02PVG0062-01ND
2012-07-26PVG1876-01SND
2012-08-28PVH2122-01SND
2012-10-01PVJ0072-01SND
2012-10-01PVJ0070-01SND
2012-10-01PVJ0064-01SND
2012-12-20PVL1426-01SND
2013-01-16PWA1119-01ND
2013-01-17PWA1115-01ND
2013-01-28PWA1665-01SND
2013-04-15550-735-1SND
2013-04-24550-1401-1ND
2013-07-01550-5830-1ND
2013-07-30550-7716-1ND
2013-07-31550-7815-1ND
2013-07-31550-7810-1SND
2013-08-26550-9435-1SND
2013-08-27550-9504-1ND
2013-10-23201310230679SND
2013-11-04201311040062SND
2013-11-26201311260351SND
2013-11-26201311260349SND
2013-11-26201311260347SND
2014-01-27201401270088SND
2014-10-07201410070504SND
2015-01-13201501130297SND
2015-01-14201501140577SND
2015-01-27201501270263SND
2015-01-28201501280380SND
2015-01-28201501280358SND
2015-02-03201502030356SND
2015-02-05201502050484SND
2015-02-10201502100337SND
2015-02-10201502100324SND
2015-02-17201502170339SND
2015-02-18201502180275SND
2015-02-24201502240346SND
2015-02-24201502240342SND
2015-05-13201505130231SND
2015-05-13201505130236SND
2015-07-08201507080265SND
2015-07-21201507220465SND
2015-07-28201507260234SND
2015-08-17201508170183SND
2015-09-10201509100490SND
2015-09-10201509100491SND
2015-09-10201509100492SND
2015-12-02201512020568SND
2016-01-06201601070016SND
2016-01-26201601260359SND
2016-05-31201605310476SND
2016-07-06201607060612SND
2016-07-06201607060594SND
2016-07-20201607200605SND
2016-10-18201610180285SND
2017-01-04201701040825SND
2017-07-27201707280101SND