Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Smackover Waterworks

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019N/A00N/A
2020ND40ND
2021ND20ND
2022N/A00N/A
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
2018-01-3018032002306ND
2018-05-2218144007406ND
2020-01-2720030004604ND
2020-01-2720030004504ND
2020-06-2920183000201ND
2020-06-2920183000301ND
2021-03-0821070008306ND
2021-06-0721161000106ND
2023-01-31O205869-OGC-1ND
2023-01-31O205868-OGC-1ND
2023-05-31O209479-OGC-1ND
2023-05-31O209480-OGC-1ND