Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Mountain Hill Water Company

NOTE: Mountain Hill Water Company purchases water from Town of North East which is required to test for hexachlorocyclopentadiene. Sample information shown below was taken by Town of North East.

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
2018ND50ND
2019ND10ND
2020N/A00N/A
2021ND20ND
2022N/A00N/A
2023ND60ND

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

NOTE: Mountain Hill Water Company purchases water from Town of North East which is required to test for hexachlorocyclopentadiene. Sample information shown below was taken by Town of North East.

Date Lab ID Result
2018-04-24E18003794003ND
2018-04-24E18003794001ND
2018-09-17L7072754_1ND
2018-09-17L7072754_2ND
2018-11-194132323ND
2019-04-099043716_01ND
2019-04-099043716_02ND
2019-10-089102287_02ND
2019-10-089102287_01_01ND
2021-06-23E21003831001ND
2021-06-23E21003832001ND
2023-07-243G05934_01ND
2023-07-243G05934_02ND
2023-11-133K03122_01ND
2023-11-133K03122_01BND
2023-11-133K03122_02ND
2023-11-133K03122_02BND