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EWG's Tap Water Database — 2019 UPDATE

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Simazine

Chesterfield County Central Water System

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.

 

27

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
2017ND70ND

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
2012-06-05E120400823ND
2012-06-05E120400836ND
2012-06-05E120400842ND
2012-06-05E120400833ND
2013-04-23E130202518ND
2013-04-23E130202512ND
2013-04-23E130202503ND
2013-04-23E130202491ND
2014-04-22E140308587ND
2014-04-22E140308584ND
2014-04-22E140308590ND
2014-04-22E140308604ND
2015-04-23VA010-DCLSND
2015-04-23VA010-DCLSND
2015-04-23VA010-DCLSND
2015-04-23VA010-DCLSND
2016-04-25E160305654ND
2016-04-25E160305674ND
2016-04-25E160305680ND
2016-04-25E160305673ND
2017-02-21E161203720ND
2017-02-21E161203725ND
2017-02-21E161203730ND
2017-04-19E170304730ND
2017-04-19E170304739ND
2017-04-19E170304732ND
2017-04-19E170304750ND