Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Thibodaux Waterworks

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0150 ppb42ND - 0.0300 ppb
2019ND40ND
2020ND30ND
20210.0170 ppb21ND - 0.0340 ppb
20220.0135 ppb21ND - 0.0270 ppb
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
2018-01-2535370415010ND
2018-01-2535370415010ND
2018-07-23354062920010.0300 ppb
2018-07-23354062920010.0300 ppb
2019-01-2935445087001ND
2019-01-2935445087001ND
2019-07-2435484852001ND
2019-07-2435484852001ND
2020-01-2235526014001ND
2020-02-2635533608001ND
2020-10-1535585521001ND
2021-03-11356192840010.0340 ppb
2021-11-0435675780001ND
2022-02-1035696479001ND
2022-08-25357427330010.0270 ppb
2023-02-2735782421001ND
2023-10-2335836722001ND