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EWG's Tap Water Database — 2021 UPDATE

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Simazine

Lafayette Utilities 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.

MORE ABOUT THIS CONTAMINANT

 

84

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND20ND
2015ND300ND
2016ND140ND
2017ND40ND
2018ND200ND
2019ND140ND

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
2014-11-03AD99281ND
2014-11-03AD99281ND
2015-02-2335176705001ND
2015-02-2335176705001ND
2015-06-0835192506001ND
2015-06-0835192506001ND
2015-07-2735199527004ND
2015-07-2735199527001ND
2015-07-2735199527002ND
2015-07-2735199527003ND
2015-07-2735199527004ND
2015-07-2735199527005ND
2015-07-2735199527003ND
2015-07-2735199527002ND
2015-07-2735199527001ND
2015-07-2735199527005ND
2015-08-1735203222004ND
2015-08-1735203222003ND
2015-08-1735203222002ND
2015-08-1735203222001ND
2015-08-1735203222005ND
2015-08-1735203222005ND
2015-08-1735203222004ND
2015-08-1735203222003ND
2015-08-1735203222002ND
2015-08-1735203222001ND
2015-11-3035218949004ND
2015-11-3035218949003ND
2015-11-3035218949004ND
2015-11-3035218949005ND
2015-11-3035218949003ND
2015-11-3035218949005ND
2016-03-1435234164005ND
2016-03-1435234164005ND
2016-03-2135235879005ND
2016-03-2135235879005ND
2016-08-0835259258005ND
2016-08-0835259258005ND
2016-08-1535260131004ND
2016-08-1535260131001ND
2016-08-1535260131002ND
2016-08-1535260131003ND
2016-08-1535260131001ND
2016-08-1535260131002ND
2016-08-1535260131004ND
2016-08-1535260131003ND
2017-09-2535338379001ND
2017-09-2535338379001ND
2017-11-2735350946001ND
2017-11-2735350946001ND
2018-03-0535378308004ND
2018-03-0535378308005ND
2018-03-0535378308005ND
2018-03-0535378308004ND
2018-03-0535378308003ND
2018-03-0535378308001ND
2018-03-0535378308003ND
2018-03-0535378308002ND
2018-03-0535378308001ND
2018-03-0535378308002ND
2018-04-3035389627001ND
2018-04-3035389627001ND
2018-05-1435392629001ND
2018-05-1435392629001ND
2018-06-1935399735003ND
2018-06-1935399735002ND
2018-06-1935399735001ND
2018-06-1935399735001ND
2018-06-1935399735002ND
2018-06-1935399735003ND
2019-01-1435442609002ND
2019-01-1435442609001ND
2019-01-1435442609001ND
2019-01-1435442609002ND
2019-08-1235490056001ND
2019-08-1235490056005ND
2019-08-1235490056004ND
2019-08-1235490056003ND
2019-08-1235490056002ND
2019-08-1235490056001ND
2019-08-1235490056005ND
2019-08-1235490056004ND
2019-08-1235490056003ND
2019-08-1235490056002ND