Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Eol Water Supply Corporation

Hexachlorocyclopentadiene was historically used for the manufacture of currently banned pesticides, such as endrin, dieldrin and chlordane. It’s still used for production of flame retardants, resins and plastics.

 

15

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
2019ND20ND
2020ND20ND
2021ND10ND
2022ND50ND
2023ND50ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 2 ppb

The EWG Health Guideline of 2 ppb for hexachlorocyclopentadiene 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 harm to the stomach and intestines.

EPA Maximum Contaminant
Level (MCL): 50 ppb

The legal limit for hexachlorocyclopentadiene, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2019-05-13AE66042ND
2019-05-13AE66043ND
2020-02-24AE99605ND
2020-04-13AF06414ND
2021-06-02AF56337ND
2022-01-25AF81752ND
2022-01-25AF81763ND
2022-04-06AF92293ND
2022-07-06AG03351ND
2022-11-22AG19717ND
2023-03-06AG31541ND
2023-06-05AG43102ND
2023-06-05AG43103ND
2023-08-21AG53203ND
2023-11-20AG64242ND