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EWG's Tap Water Database — 2021 UPDATE

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Simazine

Beauregard Water Works District #3

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

 

44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015ND20ND
2016ND200ND
2017N/A00N/A
2018ND220ND
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
2015-03-0235177665002ND
2015-03-0235177665002ND
2016-01-1935225812002ND
2016-01-1935225812001ND
2016-01-1935225812002ND
2016-01-1935225812005ND
2016-01-1935225812004ND
2016-01-1935225812003ND
2016-01-1935225812001ND
2016-01-1935225812005ND
2016-01-1935225812004ND
2016-01-1935225812003ND
2016-02-0135227539001ND
2016-02-0135227539002ND
2016-02-0135227539003ND
2016-02-0135227539004ND
2016-02-0135227539004ND
2016-02-0135227539003ND
2016-02-0135227539002ND
2016-02-0135227539001ND
2016-05-0235242594004ND
2016-05-0235242594004ND
2018-02-2735377534001ND
2018-02-2735377534001ND
2018-03-1935381349005ND
2018-03-1935381349004ND
2018-03-1935381349005ND
2018-03-1935381349004ND
2018-03-1935381349003ND
2018-03-1935381349002ND
2018-03-1935381349001ND
2018-03-1935381349001ND
2018-03-1935381349002ND
2018-03-1935381349003ND
2018-04-1635387317001ND
2018-04-1635387317005ND
2018-04-1635387317004ND
2018-04-1635387317003ND
2018-04-1635387317002ND
2018-04-1635387317001ND
2018-04-1635387317005ND
2018-04-1635387317004ND
2018-04-1635387317003ND
2018-04-1635387317002ND