Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

City of Opelousas Water System

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND100ND
2019N/A00N/A
2020ND20ND
2021ND40ND
2022N/A00N/A
2023ND60ND

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
2018-01-0935367792002ND
2018-01-0935367792003ND
2018-01-0935367792004ND
2018-01-0935367792005ND
2018-01-0935367792001ND
2018-01-0935367792002ND
2018-01-0935367792003ND
2018-01-0935367792004ND
2018-01-0935367792005ND
2018-01-0935367792001ND
2020-08-1735571769002ND
2020-08-1735571769001ND
2021-01-1935606222002ND
2021-01-1935606222003ND
2021-01-1935606222004ND
2021-01-1935606222005ND
2023-08-2835823882001ND
2023-08-2835823882002ND
2023-08-2835823882003ND
2023-08-2835823882004ND
2023-08-2835823882005ND
2023-08-2835823882006ND