Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Mustang Valley Water Supply Corporation

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.

 

10

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
2019ND50ND
2020N/A00N/A
2021N/A00N/A
2022ND50ND
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
2019-03-13Q1910654003ND
2019-03-13Q1910654007ND
2019-03-13Q1910654011ND
2019-03-13Q1910654015ND
2019-09-11Q1964031001ND
2022-10-12Q2230979001ND
2022-10-12Q2230979004ND
2022-10-12Q2230979005ND
2022-10-12Q2230979006ND
2022-10-12Q2230979007ND