Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Kennett Square Municipal Water Works

NOTE: Kennett Square Municipal Water Works purchases water from Chester Water Authority which is required to test for hexachlorocyclopentadiene. Sample information shown below was taken by Chester Water Authority.

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.

 

7

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019N/A00N/A
2020ND40ND
2021N/A00N/A
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

NOTE: Kennett Square Municipal Water Works purchases water from Chester Water Authority which is required to test for hexachlorocyclopentadiene. Sample information shown below was taken by Chester Water Authority.

Date Lab ID Result
2018-04-102308353001ND
2020-02-0321663742.00ND
2020-04-0322019217.00ND
2020-07-0122603909.00ND
2023-05-1028896900.00ND
2023-07-1229299115.00ND
2023-11-1530068593.00ND