Know Your Environment. Protect Your Health.

Heptachlor epoxide

Franklin Water Supply

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

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND20ND
2020ND20ND
2021ND20ND
2022ND30ND
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
2018-05-0335390226001ND
2018-05-0335390226001ND
2018-07-0935403036001ND
2018-07-0935403036001ND
2019-01-1535442684001ND
2019-01-1535442684001ND
2020-01-0735522561001ND
2020-09-2835581275001ND
2021-02-1135611668001ND
2021-11-3035680898001ND
2022-01-0635688910 001ND
2022-01-0635688910001ND
2022-07-2835735504001ND
2023-01-3035776509001ND
2023-10-0935833396001ND