Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Simazine

City of Sugar Land

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND60ND
20130.200 ppb110.200 ppb
2014ND40ND
20150.176 ppb115ND - 0.810 ppb
20160.263 ppb330.250 ppb - 0.270 ppb
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
2012-03-22AB84944ND
2012-03-22AB84946ND
2012-03-22AB84948ND
2012-03-22AB84947ND
2012-03-22AB84945ND
2012-08-23AB99569ND
2013-12-30AC384050.200 ppb
2014-02-11AC42308ND
2014-04-29AC52160ND
2014-07-23AC60734ND
2014-10-14AC69622ND
2015-01-22AC773920.0900 ppb
2015-04-01AC87007ND
2015-04-01AC870050.150 ppb
2015-04-01AC87008ND
2015-04-01AC87000ND
2015-04-01AC870060.130 ppb
2015-04-01AC87001ND
2015-09-30AD09169ND
2015-09-30AD09164ND
2015-11-04AD126920.760 ppb
2015-11-04AD126760.810 ppb
2016-02-02AD216240.270 ppb
2016-02-02AD216230.270 ppb
2016-02-02AD216250.250 ppb
2017-01-04AD63068ND
2017-03-22AD76458ND
2017-04-03AD78167ND