Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Cedar Crest

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
2019ND20ND
2020N/A00N/A
2021ND50ND
2022N/A00N/A
2023ND30ND

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
2018-06-27ND
2018-06-27ND
2018-08-01ND
2018-08-01ND
2018-08-01ND
2018-08-29ND
2018-08-29ND
2018-09-11ND
2019-06-18ND
2019-06-18ND
2021-06-214142944ND
2021-09-174182952ND
2021-09-174182952ND
2021-12-074221148ND
2021-12-074221148ND
2023-07-314510025ND
2023-09-114528797ND
2023-10-094541747ND