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EWG's Tap Water Database — 2021 UPDATE

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Simazine

Valencia Water Company

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.

 

46

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
2014ND380ND
2015N/A00N/A
2016N/A00N/A
2017ND80ND
2018N/A00N/A
2019N/A00N/A

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
2014-03-059590-021-0920ND
2014-03-059590-062-1045ND
2014-03-129590-005-1020ND
2014-03-129590-026-1155ND
2014-03-129590-024-0855ND
2014-03-129590-018-1045ND
2014-03-129590-052-0850ND
2014-03-129590-058-1115ND
2014-03-199590-025-0740ND
2014-03-199590-049-0805ND
2014-03-199590-070-0850ND
2014-03-199590-046-0820ND
2014-03-199590-017-0838ND
2014-03-269590-047-1043ND
2014-03-269590-073-0820ND
2014-03-269590-048-0920ND
2014-03-269590-051-1130ND
2014-03-269590-004-1100ND
2014-03-269590-003-1000ND
2014-06-049590-062-0900ND
2014-06-049590-021-0810ND
2014-06-049590-052-1000ND
2014-06-119590-018-1020ND
2014-06-119590-026-0840ND
2014-06-119590-024-0810ND
2014-06-119590-005-0950ND
2014-06-119590-058-1050ND
2014-06-189590-025-0815ND
2014-06-189590-046-0835ND
2014-06-189590-017-0900ND
2014-06-189590-051-0940ND
2014-06-189590-070-0915ND
2014-06-189590-049-0830ND
2014-06-259590-073-0820ND
2014-06-259590-048-1000ND
2014-06-259590-047-1155ND
2014-06-259590-004-1040ND
2014-06-259590-003-1030ND
2017-03-029590-062-0907ND
2017-03-029590-052-0950ND
2017-03-239590-073-0907ND
2017-03-239590-003-0805ND
2017-06-019590-062-0930ND
2017-06-019590-052-0855ND
2017-06-229590-073-0950ND
2017-06-229590-003-0850ND