Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Simazine

City of Hewitt

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013N/A00N/A
2014N/A00N/A
2015ND40ND
2016ND40ND
2017ND40ND

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
2012-01-12AB77669ND
2012-01-12AB77666ND
2012-01-12AB77665ND
2012-01-12AB77668ND
2012-01-12AB77667ND
2015-03-23AC85765ND
2015-03-23AC85762ND
2015-03-23AC85763ND
2015-10-28AD12063ND
2016-01-20AD19069ND
2016-04-06AD32184ND
2016-07-13AD44165ND
2016-10-12AD53228ND
2017-02-06AD69387ND
2017-05-02AD82274ND
2017-07-19AD90034ND
2017-10-09AD99924ND