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EWG's Tap Water Database

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Heptachlor

City of Chicago

Heptachlor is an insecticide used for termite control until 1988. It is linked to cancer, hormone disruption and neurotoxicity.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND40ND
2011ND20ND
2012ND20ND
2013ND20ND
2014ND20ND
2015ND20ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.008 ppb

The health guideline of 0.008 ppb for heptachlor was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion.

EPA Maximum Contaminant
Level (MCL) 0.4 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)0 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
2010-04-27SD01536-01_01ND
2010-04-27SD01550-01_01ND
2010-09-13SI00723-01_01ND
2010-10-26SJ01359-01_01ND
2011-04-26SD11252-01_01ND
2011-04-26SD11253-01_01ND
2012-05-07SE20386-01_01ND
2012-05-07SE20385-01_01ND
2013-06-18SF31008-01_01ND
2013-06-18SF31009-01_01ND
2014-05-20SE40922-01_01ND
2014-05-20SE40920-01_01ND
2015-06-02SF50168-01_01ND
2015-06-02SF50167-01_01ND