Know Your Environment. Protect Your Health.

Heptachlor epoxide

Country Acres/southgate

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

 

8

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
20190.0240 ppb110.0240 ppb
20200.0310 ppb110.0310 ppb
20210.0360 ppb220.0320 ppb - 0.0400 ppb
20220.0260 ppb110.0260 ppb
2023ND10ND

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
2018-08-14CB09247-01ND
2018-12-05CB13874-01ND
2019-07-18CC09296-010.0240 ppb
2020-07-27CD09450-010.0310 ppb
2021-07-27CE08168-010.0400 ppb
2021-11-09CE13046-010.0320 ppb
2022-08-17CF08119-010.0260 ppb
2023-07-27752-9849-1ND