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EWG's Tap Water Database — 2019 UPDATE

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Simazine

City of Seal Beach

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013N/A00N/A
2014ND50ND
2015ND10ND
2016N/A00N/A
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
2012-02-144417-009-0800ND
2012-05-094417-003-0740ND
2012-09-254417-003-0730ND
2014-01-304417-001-0930ND
2014-01-304417-002-0900ND
2014-04-294417-002-0815ND
2014-04-294417-001-0745ND
2014-12-024417-009-0740ND
2015-01-204417-009-0805ND
2017-01-124417-002-0815ND
2017-01-124417-009-0835ND
2017-04-244417-002-0940ND
2017-04-244417-009-1050ND