Know Your Environment. Protect Your Health.

Heptachlor epoxide

Thibodaux Waterworks

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

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND30ND
2021ND20ND
2022ND20ND
2023ND20ND

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
2018-01-2535370415010ND
2018-01-2535370415010ND
2018-07-2335406292001ND
2018-07-2335406292001ND
2019-01-2935445087001ND
2019-01-2935445087001ND
2019-07-2435484852001ND
2019-07-2435484852001ND
2020-01-2235526014001ND
2020-02-2635533608001ND
2020-10-1535585521001ND
2021-03-1135619284001ND
2021-11-0435675780001ND
2022-02-1035696479001ND
2022-08-2535742733001ND
2023-02-2735782421001ND
2023-10-2335836722001ND