Know Your Environment. Protect Your Health.

Heptachlor epoxide

Royal Acres S/d

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

 

6

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0820 ppb110.0820 ppb
20190.0380 ppb110.0380 ppb
20200.0260 ppb110.0260 ppb
2021ND10ND
2022ND10ND
20230.0339 ppb110.0339 ppb

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
2018-08-16CB08237-010.0820 ppb
2019-08-29CC10677-010.0380 ppb
2020-08-20CD08353-010.0260 ppb
2021-08-25CE07618-01ND
2022-09-14CF07157-01ND
2023-08-2337729_23-471820.0339 ppb