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EWG's Tap Water Database — 2021 UPDATE

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Simazine

Del City

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.

MORE ABOUT THIS CONTAMINANT

 

55

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND360ND
2019ND190ND

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
2018-02-273881630ND
2018-02-273881621ND
2018-02-273881612ND
2018-03-073886273ND
2018-03-073886264ND
2018-03-083887094ND
2018-03-083887085ND
2018-03-153892189ND
2018-03-153892180ND
2018-04-263922016ND
2018-05-033927868ND
2018-05-033927859ND
2018-05-313950114ND
2018-05-313950124ND
2018-06-063955061ND
2018-06-063954662ND
2018-06-213969635ND
2018-06-213969626ND
2018-08-284039476ND
2018-08-284039423ND
2018-08-284039393ND
2018-08-304042701ND
2018-08-304042692ND
2018-08-304042675ND
2018-09-054047466ND
2018-09-054047107ND
2018-09-054047098ND
2018-10-254102022ND
2018-10-254102014ND
2018-10-254102004ND
2018-10-254101968ND
2018-11-014108726ND
2018-11-014108718ND
2018-11-014108710ND
2018-11-074115032ND
2018-11-074115024ND
2019-04-184266171ND
2019-05-014280238ND
2019-05-014280250ND
2019-05-014280264ND
2019-05-014280276ND
2019-05-084288067ND
2019-05-084288058ND
2019-05-084287883ND
2019-05-084287790ND
2019-06-054315241ND
2019-12-164516144ND
2019-12-164516135ND
2019-12-164516126ND
2019-12-164516117ND
2019-12-174517983ND
2019-12-174517934ND
2019-12-174517925ND
2019-12-174517904ND
2019-12-194521463ND