Know Your Environment. Protect Your Health.

Heptachlor epoxide

Old Westbury

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

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND30ND
2020ND60ND
2021ND60ND
2022ND60ND
2023ND60ND

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
2018-11-137070937001ND
2018-11-147071092001ND
2018-12-057072990001ND
2018-12-127073710001ND
2018-12-177074135001ND
2019-08-2870103045001ND
2019-08-2870103045002ND
2019-09-1770105239001ND
2020-09-0870144946001ND
2020-09-1470145710001ND
2020-09-2170146959001ND
2020-09-2170146109001ND
2020-09-2170146593001ND
2020-09-2170145144001ND
2021-11-1070194291002ND
2021-11-1070194291001ND
2021-11-1670194897002ND
2021-11-1670194897001ND
2021-12-0870197159001ND
2021-12-2270198899001ND
2022-11-0370235618001ND
2022-11-0470235627001ND
2022-11-1470236635001-SOCSND
2022-11-1670237102001-SOCSND
2022-11-3070238257001-SOCSND
2022-12-2170240934001-SOCSND
2023-11-0170276065001ND
2023-11-0170276065002ND
2023-11-2970279034001ND
2023-11-2970279034002ND
2023-12-0470279530002ND
2023-12-2170281844001ND