Know Your Environment. Protect Your Health.

Heptachlor epoxide

Washington Ridge C.c.

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

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND30ND
2020ND10ND
2021ND10ND
2022ND60ND
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-03-21CA2910013_005_005-201803210800ND
2018-06-06CA2910013_005_005-201806061000ND
2018-07-18CA2910013_005_005-201807180930ND
2018-11-27CA2910013_005_005-201811271000ND
2019-03-27CA2910013_003_003-201903270845ND
2019-03-27CA2910013_005_005-201903270900ND
2019-03-27CA2910013_002_002-201903270830ND
2020-06-16CA2910013_005_005-202006161330ND
2021-06-24CA2910013_005_005-202106240915ND
2022-03-08CA2910013_002_002-202203081033ND
2022-03-08CA2910013_003_003-202203081111ND
2022-03-08CA2910013_005_005-202203081138ND
2022-05-05CA2910013_002_002-202205050915ND
2022-05-05CA2910013_003_003-202205050920ND
2022-05-05CA2910013_005_005-202205050930ND