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EWG's Tap Water Database — 2019 UPDATE

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Simazine

Doyon Utilities Jber - Richardson

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.

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND160ND
2013N/A00N/A
2014N/A00N/A
2015ND120ND
2016ND10ND
2017ND40ND

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
2012-01-23PE*2581089ND
2012-01-23PE*2581103ND
2012-01-23PE*2581110ND
2012-01-23PE*2581113ND
2012-01-23PE*2581076ND
2012-04-23PE*2629745ND
2012-04-23PE*2629761ND
2012-04-23PE*2629782ND
2012-04-23PE*2629807ND
2012-07-24PE*2682052ND
2012-07-24PE*2682124ND
2012-07-24PE*2682077ND
2012-11-26PE*2745626ND
2012-11-26PE*2745640ND
2012-11-26PE*2745650ND
2012-11-26PE*2745660ND
2015-02-24PE*3195308ND
2015-02-24PE*3195672ND
2015-02-24PE*3195339ND
2015-06-23PE*3268442ND
2015-06-23PE*3268599ND
2015-06-23PE*3268614ND
2015-09-14PE*3322324ND
2015-09-14PE*3322335ND
2015-09-14PE*3322352ND
2015-12-07PE*3371143ND
2015-12-07PE*3371156ND
2015-12-07PE*3371166ND
2016-03-29PE*3422157ND
2017-03-06PE*3649762ND
2017-05-22PE*3698683ND
2017-08-28PE*3767824ND
2017-10-11PE*3797936ND