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EWG's Tap Water Database — 2019 UPDATE

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Simazine

Chapel Hill - Aberdeen Proving Grounds

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND30ND
2014ND30ND
2015ND30ND
2016ND30ND
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
2013-09-260120002_01_10503ND
2013-11-120120002_01_00255ND
2013-11-270120002_01_06090ND
2014-06-230120002_01_20139ND
2014-07-220120002_01_00029ND
2014-09-290120002_01_20316ND
2015-06-122076663001ND
2015-09-142095595001ND
2015-10-19E16001689005ND
2016-05-09E16004258010ND
2016-06-082149676001ND
2016-09-152175297001ND
2017-04-19E17004136001ND
2017-06-072236688ND
2017-09-202236688_AND