Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Valley Water and Sewer-deerwood

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
2018N/A00N/A
2019ND10ND
2020ND40ND
2021ND40ND
2022ND40ND
2023ND40ND

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
2019-08-06680-172767-1ND
2020-03-18481646ND
2020-06-03487811ND
2020-09-02497137ND
2020-12-01505423ND
2021-03-161034275-01ND
2021-06-101063668-01ND
2021-09-24810-3693-1ND
2021-12-28810-11028-1ND
2022-03-03810-16704-1AND
2022-05-23FWE0505-01ND
2022-08-18FWH0299ND
2022-10-26FWJ0182-01ND
2023-02-16FXB0441-01ND
2023-04-06FXC0466ND
2023-08-29FXH0906ND
2023-11-1568355101ND