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EWG's Tap Water Database — 2021 UPDATE

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Heptachlor epoxide

City of Pineville Water System

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

MORE ABOUT THIS CONTAMINANT

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015N/A00N/A
2016ND220ND
2017ND20ND
2018N/A00N/A
2019N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.006 ppb

The EWG 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.

EPA Maximum Contaminant
Level (MCL) 0.2 ppb

The legal limit for heptachlor epoxide, established in 1991, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-10AD89665ND
2014-03-10AD89665ND
2014-06-09AD92100ND
2014-06-09AD92100ND
2016-09-1535265896005ND
2016-09-1535265896005ND
2016-09-2835268029013ND
2016-09-2835268029009ND
2016-09-2835268029010ND
2016-09-2835268029011ND
2016-09-2835268029012ND
2016-09-2835268029013ND
2016-09-2835268029012ND
2016-09-2835268029011ND
2016-09-2835268029010ND
2016-09-2835268029009ND
2016-11-1635278842006ND
2016-11-1635278842009ND
2016-11-1635278842008ND
2016-11-1635278842007ND
2016-11-1635278842006ND
2016-11-1635278842008ND
2016-11-1635278842007ND
2016-11-1635278842009ND
2016-12-1535283877001ND
2016-12-1535283877001ND
2017-09-2735338974001ND
2017-09-2735338974001ND