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EWG's Tap Water Database — 2019 UPDATE

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Simazine

Evansville

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.375 ppb41ND - 1.50 ppb
2013ND40ND
20140.925 ppb41ND - 3.70 ppb
2015ND40ND
20160.113 ppb41ND - 0.450 ppb
20170.525 ppb41ND - 2.10 ppb

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
2012-01-25SA20967-01_011.50 ppb
2012-06-12SF20674-01_01ND
2012-09-25SI21218-01_01ND
2012-11-07SK20291-01_01ND
2013-01-23SA30747-01_01ND
2013-05-29SE31419-01_01ND
2013-09-25SI31363-01_01ND
2013-10-21SJ31111-01_01ND
2014-03-18SC40605-01_013.70 ppb
2014-06-25SF41438-01_01ND
2014-09-24SI41281-01_01ND
2014-11-19SK40650-01_01ND
2015-03-24SC50585-01_01ND
2015-06-16SF50854-01_01ND
2015-09-16SI50838-01_01ND
2015-11-30SL50026-01_01ND
2016-03-0116C0067-01_010.450 ppb
2016-06-2216F1102-01_01ND
2016-08-1616H0844-01_01ND
2016-11-0116K0055-01_01ND
2017-01-2517A0715-01_012.10 ppb
2017-06-2117F0995-01_01ND
2017-07-1217G0509-01_01ND
2017-10-2517J0870-01_01ND