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EWG's Tap Water Database — 2021 UPDATE

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Heptachlor epoxide

Paw Penn District

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

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015N/A00N/A
2016N/A00N/A
2017ND140ND
2018N/A00N/A
2019ND20ND

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
2014-04-0125337701ND
2014-04-0125337901ND
2014-04-0225337201ND
2014-04-0225338601ND
2014-04-0225337501ND
2014-04-0425337101ND
2014-04-0425338401ND
2014-04-0425338101ND
2014-07-0726114201ND
2014-07-0726113001ND
2014-07-0726113501ND
2014-07-0926113701ND
2014-07-0926114001ND
2014-07-0926113301ND
2014-07-0926113101ND
2014-09-0426113901ND
2017-04-0315975888ND
2017-04-0315975857ND
2017-04-0315975826ND
2017-04-0315975797ND
2017-04-0315975766ND
2017-04-0315975919ND
2017-04-0315975737ND
2017-07-0616450214ND
2017-07-0616450243ND
2017-07-0616450274ND
2017-07-0616450336ND
2017-07-1116450156ND
2017-07-1116450305ND
2017-07-1116450185ND
2019-07-1545716201ND
2019-10-3143999701ND