Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Connecticut Water Company - Hebron Center Division

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.

 

11

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
2019ND10ND
2020N/A00N/A
2021ND20ND
2022ND40ND
2023ND40ND

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
2019-02-11SOC 200521212ND
2021-08-31300067011 300067016ND
2021-10-25S300088197 300088199ND
2022-01-13CK16252ND
2022-04-21CL13693ND
2022-07-07CL72298ND
2022-10-18CM65670ND
2023-01-12CN22970ND
2023-04-17CN85300ND
2023-08-15CO75343ND
2023-10-17CP28041ND