Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Hazardville Water Company

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.

 

14

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
2019N/A00N/A
2020ND120ND
2021N/A00N/A
2022N/A00N/A
2023ND20ND

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
2020-05-19CF98410ND
2020-05-19CF98413ND
2020-05-19CF98414ND
2020-05-20CF98411ND
2020-05-20CF98408ND
2020-05-20CF98409ND
2020-12-15CH32273ND
2020-12-15CH32270ND
2020-12-15CH32272ND
2020-12-15CH32275ND
2020-12-15CH32271ND
2020-12-15CH32276ND
2023-02-28CN51115ND
2023-09-12CO95278ND