Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Four Way Special Utility District

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND20ND
2020ND20ND
2021ND40ND
2022ND20ND
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
2018-03-08Q1809770001ND
2018-03-08Q1809770002ND
2018-03-08Q1809770003ND
2018-03-08Q1809770004ND
2019-06-04Q1931189013ND
2019-06-04Q1931189014ND
2020-06-17Q2024644001ND
2020-08-11Q2031797013ND
2021-06-02Q2114209001ND
2021-06-02Q2114209002ND
2021-06-02Q2114209003ND
2021-06-02Q2114209012ND
2022-03-07Q2207619001ND
2022-03-07Q2207619002ND
2023-04-24Q2315229006ND
2023-06-05Q2320826026ND