Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Purcellville, Town of

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND20ND
2020N/A00N/A
2021ND40ND
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
2018-03-13E180100343ND
2018-05-30E180303848ND
2018-05-30E180303852ND
2018-08-21E180601977ND
2018-08-28E180601952ND
2019-03-21E190302937ND
2019-03-21E190302946ND
2021-02-24E210100123ND
2021-05-17E210400634ND
2021-05-24E210400642ND
2021-08-18E210601480ND
2023-01-25E221203948ND
2023-06-12E230305122ND
2023-06-12E230305395ND
2023-08-22E230603368ND