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EWG's Tap Water Database — 2019 UPDATE

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Simazine

City of Beeville

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
20130.0450 ppb41ND - 0.180 ppb
2014ND10ND
2015ND10ND
2016ND10ND
20170.120 ppb110.120 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
2012-03-061203193002ND
2013-02-20AC111480.180 ppb
2013-06-24AC23023ND
2013-09-04AC29223ND
2013-10-15AC32145ND
2014-02-05AC41641ND
2015-01-26AC77700ND
2016-01-11AD17423ND
2017-01-10AD641180.120 ppb