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EWG's Tap Water Database

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Heptachlor

Forrest City Waterworks

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

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND40ND
2011ND20ND
2012N/A00N/A
2013ND40ND
2014ND20ND
2015N/A00N/A

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
2010-07-2810210006106ND
2010-07-2810210006206ND
2010-11-1610321000906ND
2010-11-1610321000806ND
2011-05-2511146008006ND
2011-08-0311216000106ND
2013-08-2713241000206ND
2013-08-2713241000306ND
2013-11-0513310000906ND
2013-11-0513310000806ND
2014-04-2314114013806ND
2014-08-2714240000606ND