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EWG's Tap Water Database — 2021 UPDATE

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Simazine

Cedar Rapids Water Department

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

 

154

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND260ND
2015ND240ND
2016ND260ND
2017ND260ND
2018ND260ND
2019ND260ND

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
2014-01-082028391ND
2014-01-082028393ND
2014-02-042032314ND
2014-02-042032315ND
2014-03-042038914ND
2014-03-042038915ND
2014-04-012043702ND
2014-04-012043703ND
2014-05-062051482ND
2014-05-062051484ND
2014-06-102057924ND
2014-06-102057925ND
2014-07-152064801ND
2014-07-152064802ND
2014-08-062071566ND
2014-08-062071567ND
2014-09-032076109ND
2014-09-032076110ND
2014-10-082085398ND
2014-10-082085401ND
2014-10-082084287ND
2014-10-082084289ND
2014-11-042089398ND
2014-11-042089399ND
2014-12-022094999ND
2014-12-022095000ND
2015-01-06OE208979ND
2015-01-06OE208981ND
2015-02-03OE212653ND
2015-02-03OE212654ND
2015-03-10OE219210ND
2015-03-10OE219211ND
2015-04-07OE228729ND
2015-04-07OE228731ND
2015-05-05OE240279ND
2015-05-05OE240278ND
2015-06-02OE250980ND
2015-06-02OE250978ND
2015-07-07OE265197ND
2015-07-07OE265195ND
2015-08-04OE277200ND
2015-08-05OE277199ND
2015-09-01OE288650ND
2015-09-01OE288651ND
2015-10-06OE302401ND
2015-10-06OE302405ND
2015-10-06OE302403ND
2015-10-06OE302404ND
2015-11-03OE314505ND
2015-11-03OE314506ND
2016-01-05OE333112ND
2016-01-05OE333114ND
2016-02-02OE341813ND
2016-02-02OE341812ND
2016-03-01OE351024ND
2016-03-01OE351023ND
2016-04-05OE363125ND
2016-04-05OE363126ND
2016-05-03OE374503ND
2016-05-03OE374504ND
2016-06-07OE387286ND
2016-06-07OE387284ND
2016-07-05OE397260ND
2016-07-05OE397261ND
2016-08-02OE410581ND
2016-08-02OE410582ND
2016-09-06OE425335ND
2016-09-06OE425334ND
2016-10-10OE438462ND
2016-10-10OE438459ND
2016-10-17OE441633ND
2016-10-17OE441634ND
2016-11-01OE448206ND
2016-11-01OE448207ND
2016-12-06OE459323ND
2016-12-06OE459322ND
2017-01-03OE467516ND
2017-01-03OE467517ND
2017-02-07OE479086ND
2017-02-07OE479088ND
2017-03-07OE488542ND
2017-03-07OE488543ND
2017-04-04OE498242ND
2017-04-04OE498243ND
2017-05-02OE508280ND
2017-05-02OE508278ND
2017-06-06OE521222ND
2017-06-06OE521220ND
2017-07-05OE532845ND
2017-07-05OE532844ND
2017-08-01OE545140ND
2017-08-01OE545139ND
2017-09-12OE564051ND
2017-09-12OE564049ND
2017-10-03OE573413ND
2017-10-03OE573418ND
2017-11-07OE588322ND
2017-11-07OE588323ND
2017-11-20OE592397ND
2017-11-20OE592396ND
2017-12-12OE600497ND
2017-12-12OE600498ND
2018-01-16OE611580ND
2018-01-16OE611581ND
2018-02-06OE619689ND
2018-02-06OE619690ND
2018-03-06OE631638ND
2018-03-14OE633823ND
2018-04-03OE641493ND
2018-04-03OE641494ND
2018-05-01OE652376ND
2018-05-01OE652377ND
2018-06-05OE667156ND
2018-06-05OE667157ND
2018-07-03OE678210ND
2018-07-03OE678211ND
2018-08-07OE696554ND
2018-08-07OE696556ND
2018-09-05OE708929ND
2018-09-05OE708930ND
2018-10-02OE722038ND
2018-10-02OE722040ND
2018-11-06OE736254ND
2018-11-06OE736255ND
2018-11-06OE736260ND
2018-11-06OE736261ND
2018-12-04OE746434ND
2018-12-04OE746435ND
2019-01-08OE757692ND
2019-01-08OE757693ND
2019-02-05OE767848ND
2019-02-05OE767850ND
2019-03-05OE777394ND
2019-03-05OE777395ND
2019-04-02OE788685ND
2019-04-02OE788687ND
2019-05-07OE804461ND
2019-05-07OE804463ND
2019-06-04OE816207ND
2019-06-04OE816208ND
2019-07-02OE828962ND
2019-07-02OE828963ND
2019-08-06OE845542ND
2019-08-20OE853088ND
2019-09-03OE860326ND
2019-09-03OE860327ND
2019-10-01OE873206ND
2019-10-01OE873207ND
2019-11-19OE895605ND
2019-11-19OE895606ND
2019-11-19OE895628ND
2019-11-19OE895629ND
2019-12-03OE900645ND
2019-12-03OE900646ND