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EWG's Tap Water Database

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Heptachlor epoxide

South Hero Fire District 4

Heptachlor epoxide is a breakdown product of heptachlor, a highly toxic and carcinogenic pesticide banned in the U.S. since the 1980s.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011N/A00N/A
2012ND40ND
2013ND40ND
2014ND30ND
2015ND50ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.006 ppb

The health guideline of 0.006 ppb for heptachlor epoxide 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) 0.2 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
2012-03-1312S174ND
2012-06-1812S190ND
2012-09-1213S00093ND
2012-12-1013S00139ND
2013-02-1213S00167ND
2013-05-1413S00212ND
2013-08-1414S00045ND
2013-11-1214S00111ND
2014-02-1114S00132ND
2014-08-1215S00047ND
2014-11-0915S00141ND
2015-02-0915S00165ND
2015-03-251503-05470-001ND
2015-05-1215S00202ND
2015-08-1816S00036ND
2015-11-1116S00087ND