Menu

EWG's Tap Water Database

Donate

Simazine

Fremont 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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND30ND
20110.0333 ppb31ND - 0.1000 ppb
20120.0333 ppb31ND - 0.1000 ppb
20130.0788 ppb660.0640 ppb - 0.120 ppb
20140.0750 ppb65ND - 0.120 ppb
20150.0945 ppb660.0660 ppb - 0.120 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.1 ppb

The 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.

ppb = parts per billion.

EPA Maximum Contaminant
Level (MCL) 4 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)4 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-04-09103285-01ND
2010-05-10104071-01BND
2010-06-09104941-01ND
2011-04-0511-12315-05ND
2011-05-0911-13246-01ND
2011-06-0611-13932-030.1000 ppb
2012-04-1112-14075-03ND
2012-05-0912-15295-02ND
2012-06-0612-16544-050.1000 ppb
2013-02-0413-11314-010.120 ppb
2013-04-0113-13943-010.0640 ppb
2013-05-0613-15439-010.0750 ppb
2013-06-0313-16817-01B0.0730 ppb
2013-07-0113-18526-050.0730 ppb
2013-10-0113-23328-010.0680 ppb
2014-02-0414-11372-010.0990 ppb
2014-04-0114-13877-070.120 ppb
2014-05-0514-15302-010.0710 ppb
2014-06-0214-16804-01B0.0600 ppb
2014-07-0114-18617-030.1000 ppb
2014-10-0614-23864-07ND
2015-02-0315-11275-010.0950 ppb
2015-04-0115-13990-010.120 ppb
2015-05-0415-15619-020.0900 ppb
2015-06-0115-17183-01C0.120 ppb
2015-07-0815-19413-010.0760 ppb
2015-10-0515-24452-010.0660 ppb