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EWG's Tap Water Database — 2019 UPDATE

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Cyanazine (Bladex)

St. Louis City

Cyanazine, a cancer-causing chemical related to the herbicide atrazine, has been phased out of use in the U.S. since 1995. Cyanazine has been also linked to birth defects and damage to the central nervous system.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND20ND
2015ND40ND
2016ND20ND
2017ND60ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1 ppb

The EWG Health Guideline of 1 ppb for cyanazine was defined by the Environmental Protection Agency as a lifetime health-based limit for effects other than cancer. This health guideline protects against .

ppb = parts per billion

All test results

Date Lab ID Result
2012-05-09AB71796ND
2012-05-09AB71797ND
2013-05-06AB97903ND
2013-05-06AB97904ND
2014-06-02AC23738ND
2014-06-02AC23739ND
2015-03-17AC44661ND
2015-03-17AC44660ND
2015-06-01AC47106ND
2015-06-01AC47107ND
2016-06-06AC75865ND
2016-06-06AC75864ND
2017-05-19AC98044ND
2017-05-19AC98045ND
2017-06-21AC99039ND
2017-06-21AC99038ND
2017-09-11AD07442ND
2017-09-11AD07443ND