Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Berwick Bayou Vista Water Works Commission

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
2019ND40ND
2020ND20ND
2021ND20ND
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
2018-05-0335390206001ND
2018-05-0335390206001ND
2018-07-0935403038001ND
2018-07-0935403038001ND
2019-01-1535442693001ND
2019-01-1535442693001ND
2019-07-0935480722001ND
2019-07-0935480722001ND
2020-02-0435528640001ND
2020-10-1535585522001ND
2021-03-2535621779001ND
2021-11-3035680897001ND
2022-03-2435706097001ND
2022-07-2835735505001ND
2023-09-2635830707001ND
2023-10-0935833393001ND