Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Port Sulphur Water 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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0165 ppb42ND - 0.0330 ppb
20190.0160 ppb84ND - 0.0460 ppb
20200.0168 ppb41ND - 0.0670 ppb
20210.0163 ppb42ND - 0.0330 ppb
2022ND20ND
20230.00700 ppb41ND - 0.0280 ppb

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
2018-04-17353869540010.0330 ppb
2018-04-17353869540010.0330 ppb
2018-10-0235421762001ND
2018-10-0235421762001ND
2019-02-05354467330010.0180 ppb
2019-02-05354467330010.0180 ppb
2019-05-3035472024001ND
2019-05-3035472024001ND
2019-08-14354904190010.0460 ppb
2019-08-14354904190010.0460 ppb
2019-10-0835503647001ND
2019-10-0835503647001ND
2020-03-1035536681001ND
2020-03-1835538502001ND
2020-10-2635587643001ND
2020-11-18355934100010.0670 ppb
2021-03-01356157320010.0330 ppb
2021-03-01356157340010.0320 ppb
2021-09-1335663084001ND
2021-10-2635673864001ND
2022-01-1335690764001ND
2022-08-0435737246001ND
2023-02-0135777177001ND
2023-10-0335831861001ND
2023-10-0535832714001ND
2023-10-11358341550010.0280 ppb