Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Del Dios Mutual Water Company

NOTE: Del Dios Mutual Water Company purchases water from Rincon Del Diablo MWD(ID-1) which is required to test for hexachlorocyclopentadiene. Sample information shown below was taken by Rincon Del Diablo MWD(ID-1).

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.

 

0

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
2019ND30ND
2020N/A00N/A
2021N/A00N/A
2022ND30ND
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: Del Dios Mutual Water Company purchases water from Rincon Del Diablo MWD(ID-1) which is required to test for hexachlorocyclopentadiene. Sample information shown below was taken by Rincon Del Diablo MWD(ID-1).

Date Lab ID Result