Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

West Jefferson Waterworks District 2

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
20190.0200 ppb42ND - 0.0400 ppb
2020ND10ND
20210.0200 ppb42ND - 0.0430 ppb
20220.0145 ppb21ND - 0.0290 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
2018-04-17353869540050.0300 ppb
2018-04-17353869540050.0300 ppb
2018-10-0235421760001ND
2018-10-0235421760001ND
2019-02-0535446731001ND
2019-02-0535446731001ND
2019-08-14354904150010.0400 ppb
2019-08-14354904150010.0400 ppb
2020-10-2635587646001ND
2021-01-2835608074001ND
2021-12-0835683670001ND
2021-12-09356833060010.0370 ppb
2021-12-09356833220010.0430 ppb
2022-01-1335690758001ND
2022-08-04357372480010.0290 ppb
2023-02-0135777179001ND
2023-10-3135838752001ND