Know Your Environment. Protect Your Health.

Heptachlor epoxide

West Gregg Special Utility District

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

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND40ND
2020ND30ND
2021ND30ND
2022ND40ND
2023ND30ND

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
2018-09-13Q1836486006ND
2018-09-13Q1836486005ND
2018-12-05Q1849734001ND
2019-02-14Q1906942001ND
2019-02-14Q1906942012ND
2019-03-28Q1912650005ND
2019-03-28Q1912650006ND
2020-01-09Q2000956020ND
2020-01-09Q2000956021ND
2020-01-09Q2000956022ND
2021-06-15Q2115566001ND
2021-06-15Q2115566003ND
2021-06-15Q2115566002ND
2022-03-14Q2208516001ND
2022-08-17Q2224332005ND
2022-08-17Q2224332006ND
2022-08-17Q2224332007ND
2023-03-07Q2308919012ND
2023-03-07Q2308919021ND
2023-07-19Q2328453004ND