Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Two 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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND10ND
2020N/A00N/A
2021ND50ND
2022ND10ND
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
2018-06-25Q1825251001ND
2018-06-25Q1825251002ND
2018-06-25Q1825251013ND
2018-06-25Q1825251018ND
2018-06-25Q1825251019ND
2019-10-14Q1972459013ND
2021-11-09Q2131341001ND
2021-11-09Q2131341002ND
2021-11-09Q2131341003ND
2021-11-09Q2131341004ND
2021-11-09Q2131341005ND
2022-10-11Q2230663016ND