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EWG's Tap Water Database — 2019 UPDATE

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Simazine

New Orleans Algiers Water Works

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND40ND
20140.380 ppb42ND - 0.760 ppb
2015ND40ND
2016ND40ND
2017ND20ND

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
2012-03-05AD64088ND
2012-03-05AD64088ND
2012-12-17AD74173ND
2012-12-17AD74173ND
2013-01-22AD74828ND
2013-01-22AD74828ND
2013-09-24AD84670ND
2013-09-24AD84670ND
2014-02-04AD887440.760 ppb
2014-02-04AD887440.760 ppb
2014-10-22AD98836ND
2014-10-22AD98836ND
2015-03-1635179807001ND
2015-03-1635179807001ND
2015-10-1435212328004ND
2015-10-1435212328004ND
2016-01-2735226999001ND
2016-01-2735226999001ND
2016-12-1335283615002ND
2016-12-1335283615002ND
2017-02-2235296827001ND
2017-02-2235296827001ND