Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Assumption Parish Waterworks District 1

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0320 ppb220.0320 ppb
2019ND40ND
2020ND10ND
20210.0175 ppb21ND - 0.0350 ppb
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
2018-07-23354062850010.0320 ppb
2018-07-23354062850010.0320 ppb
2019-01-2935445085001ND
2019-01-2935445085001ND
2019-07-2435484850001ND
2019-07-2435484850001ND
2020-10-1535585526001ND
2021-03-25356217780010.0350 ppb
2021-11-0435675771001ND
2022-02-1035696476001ND
2022-08-2535742736001ND
2023-02-2735782417001ND
2023-10-2335836720001ND