Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Vivian Water System

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
2018ND40ND
2019ND40ND
2020ND30ND
20210.0235 ppb21ND - 0.0470 ppb
2022ND10ND
20230.0133 ppb31ND - 0.0400 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
2018-01-0835367519001ND
2018-01-0835367519001ND
2018-07-2335407296001ND
2018-07-2335407296001ND
2019-02-1835449625001ND
2019-02-1835449625001ND
2019-07-2535485237001ND
2019-07-2535485237001ND
2020-02-1135530385001ND
2020-08-0435567924001ND
2020-09-3035581641001ND
2021-01-05356025300010.0470 ppb
2021-08-1035655130001ND
2022-02-1435697796001ND
2023-01-3035776976005ND
2023-08-15358214890010.0400 ppb
2023-12-1235848285001ND