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EWG's Tap Water Database — 2019 UPDATE

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Simazine

Glendale Water Department

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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND40ND
2014ND40ND
2015ND40ND
2016ND40ND
2017ND110ND

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
2012-01-109590-069-0905ND
2012-04-119590-069-0940ND
2012-07-119590-069-0746ND
2012-10-109590-069-0740ND
2013-01-099590-069-1058ND
2013-04-109590-069-0950ND
2013-07-109590-069-0904ND
2013-10-099590-069-0945ND
2014-01-159590-069-1010ND
2014-04-099590-069-1040ND
2014-07-099590-069-0923ND
2014-10-149590-069-1223ND
2015-01-149590-069-0941ND
2015-04-159590-069-0811ND
2015-07-159590-069-0957ND
2015-10-149590-069-0903ND
2016-01-139590-069-0931ND
2016-04-139590-069-1057ND
2016-07-139590-069-1017ND
2016-10-139590-069-1027ND
2017-01-129588-069-1003ND
2017-02-219588-069-1027ND
2017-03-169588-069-1027ND
2017-04-139588-069-1017ND
2017-05-119588-069-0927ND
2017-06-129588-069-0847ND
2017-07-139588-069-0900ND
2017-08-109588-069-0921ND
2017-10-109588-069-1131ND
2017-11-169588-069-1113ND
2017-12-159588-069-0823ND