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EWG's Tap Water Database — 2019 UPDATE

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Simazine

City of Angleton

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.0175 ppb41ND - 0.0700 ppb
20130.0850 ppb220.0800 ppb - 0.0900 ppb
2014ND20ND
20150.0350 ppb21ND - 0.0700 ppb
2016ND20ND
2017ND30ND

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
2012-01-03AB76892ND
2012-01-03AB768910.0700 ppb
2012-04-03AB85871ND
2012-07-09AB94723ND
2013-01-29AC090370.0900 ppb
2013-01-29AC090380.0800 ppb
2014-02-25AC44579ND
2014-02-25AC44576ND
2015-01-15AC765820.0700 ppb
2015-01-15AC76579ND
2016-01-20AD19059ND
2016-01-20AD19065ND
2017-01-12AD64880ND
2017-01-12AD64879ND
2017-03-28AD77287ND