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EWG's Tap Water Database — 2019 UPDATE

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Simazine

North Penn Water Authority

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.

 

62

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND10ND
2014ND240ND
2015ND40ND
2016ND40ND
2017ND280ND

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
2012-04-0212040263ND
2013-04-0113040239-01ND
2014-04-2214040589-01ND
2014-04-2214030715-01ND
2014-04-2214040590-01ND
2014-04-2214030714-01ND
2014-04-2214030712-01ND
2014-04-2814040582-01ND
2014-04-2914030718-01ND
2014-04-2914040579-01ND
2014-04-2914030716-01ND
2014-04-2914030719-01ND
2014-05-1914041348-01ND
2014-06-0914060594-01ND
2014-07-071425949ND
2014-07-071425953ND
2014-07-071425942ND
2014-07-071425943ND
2014-07-071425946ND
2014-07-211427976ND
2014-07-211427975ND
2014-08-041431083ND
2014-08-2514082296-01ND
2014-08-2514082295-01ND
2014-08-2514082298-01ND
2014-08-2514082297-01ND
2015-04-0612750102ND
2015-04-0612633585ND
2015-07-0213013249ND
2015-12-0913633929ND
2016-04-0414102805ND
2016-09-1914908634ND
2016-12-2715372293ND
2016-12-2715372315ND
2017-01-1115656080ND
2017-04-0515937038ND
2017-04-0515937002ND
2017-04-0515936967ND
2017-04-0515937073ND
2017-04-0515937145ND
2017-04-0515937180ND
2017-04-0515937109ND
2017-04-1915937960ND
2017-04-1915938032ND
2017-04-1915937996ND
2017-04-1915937924ND
2017-04-1915937852ND
2017-04-1915937888ND
2017-07-1216414061ND
2017-07-1216413884ND
2017-07-1216414025ND
2017-07-1216413954ND
2017-07-1216413919ND
2017-07-1216414097ND
2017-07-1216413990ND
2017-07-1716414132ND
2017-07-1716414204ND
2017-07-1716414168ND
2017-07-1716414240ND
2017-07-1716414276ND
2017-07-1716414312ND
2017-10-0916880759ND