Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Hanson Water Department

NOTE: Hanson Water Department purchases water from Brockton Water Commission which is required to test for hexachlorocyclopentadiene. Sample information shown below was taken by Brockton Water Commission.

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
2018ND40ND
2019N/A00N/A
2020ND40ND
2021N/A00N/A
2022ND20ND
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

NOTE: Hanson Water Department purchases water from Brockton Water Commission which is required to test for hexachlorocyclopentadiene. Sample information shown below was taken by Brockton Water Commission.

Date Result
2018-06-12ND
2018-06-12ND
2018-12-10ND
2018-12-10ND
2020-06-08ND
2020-06-09ND
2020-12-01ND
2020-12-02ND
2022-09-21ND
2022-12-01ND
2023-06-01ND
2023-12-06ND