Know Your Environment. Protect Your Health.

Heptachlor epoxide

Rolling 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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0403 ppb440.0240 ppb - 0.0530 ppb
20190.0317 ppb330.0270 ppb - 0.0400 ppb
20200.0470 ppb110.0470 ppb
20210.0460 ppb110.0460 ppb
2022ND10ND
20230.0250 ppb110.0250 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
2018-01-25CA18436-010.0390 ppb
2018-04-03CB03485-010.0240 ppb
2018-07-31CB08232-010.0450 ppb
2018-10-04CB14410-010.0530 ppb
2019-04-16CC04293-010.0400 ppb
2019-07-23CC10674-010.0280 ppb
2019-10-29CC15925-010.0270 ppb
2020-01-15CC20098-010.0470 ppb
2021-05-27CE02833-010.0460 ppb
2022-06-17CF02433-01ND
2023-12-2037729_23-723730.0250 ppb