Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Darbonne Ws North

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
2018N/A00N/A
2019ND100ND
2020ND10ND
2021N/A00N/A
2022ND40ND
2023N/A00N/A

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
2019-09-0935496832001ND
2019-09-0935496832002ND
2019-09-0935496832003ND
2019-09-0935496832004ND
2019-09-0935496832005ND
2019-09-0935496832001ND
2019-09-0935496832002ND
2019-09-0935496832003ND
2019-09-0935496832004ND
2019-09-0935496832005ND
2020-11-1835593639001ND
2022-08-3135744181001ND
2022-08-3135744181002ND
2022-08-3135744181003ND
2022-08-3135744181004ND