Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Belle Chasse 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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0395 ppb440.0370 ppb - 0.0420 ppb
20190.0215 ppb440.0200 ppb - 0.0230 ppb
2020ND10ND
20210.0165 ppb21ND - 0.0330 ppb
20220.0200 ppb21ND - 0.0400 ppb
20230.0135 ppb21ND - 0.0270 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
2018-04-17353869540020.0370 ppb
2018-04-17353869540020.0370 ppb
2018-10-02354217690010.0420 ppb
2018-10-02354217690010.0420 ppb
2019-02-05354467350010.0200 ppb
2019-02-05354467350010.0200 ppb
2019-08-14354904180010.0230 ppb
2019-08-14354904180010.0230 ppb
2020-10-2635587644001ND
2021-03-01356157300010.0330 ppb
2021-12-0835683691001ND
2022-01-1335690757001ND
2022-08-04357372470010.0400 ppb
2023-02-01357771780010.0270 ppb
2023-10-3135838751001ND