Know Your Environment. Protect Your Health.

Heptachlor epoxide

Ruston Water System

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

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND130ND
2021N/A00N/A
2022N/A00N/A
2023ND100ND

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
2020-01-0735523111001ND
2020-01-1335524733008ND
2020-01-1335524057001ND
2020-01-1335524733001ND
2020-01-1335524733002ND
2020-01-1335524733003ND
2020-01-1335524733004ND
2020-01-1335524733005ND
2020-01-1335524733006ND
2020-01-1335524733007ND
2020-06-2235558556001ND
2020-06-2235558556002ND
2020-12-0835597801001ND
2023-02-2735782669001ND
2023-02-2735782669002ND
2023-02-2735782669003ND
2023-02-2735782669004ND
2023-02-2735782669005ND
2023-03-0635784479001ND
2023-03-0635784479002ND
2023-03-0635784479003ND
2023-03-0635784479004ND
2023-03-0635784479005ND