Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

City of Lewiston

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND50ND
2020ND60ND
2021ND50ND
2022ND30ND
2023ND10ND

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
2018-02-21S180221045-001ND
2018-02-22S180223004-001ND
2018-12-13S181213011-002ND
2018-12-13S181213011-001ND
2019-02-19S190221006-001ND
2019-04-23S190423067-001ND
2019-04-23S190423067-002ND
2019-08-14S190814080-001ND
2019-08-14S190814075-003ND
2020-02-19S200219035-001ND
2020-07-28SMAG0811-08ND
2020-07-28SMAG0811-07ND
2020-07-28SMAG0811-05ND
2020-07-28SMAG0811-03ND
2020-07-28SMAG0811-01ND
2021-06-29SMBF0852-03ND
2021-06-29SMBF0852-01ND
2021-06-29SMBF0852-07ND
2021-06-29SMBF0852-06ND
2021-06-29SMBF0852-04ND
2022-06-28SMCF0954-01ND
2022-09-21SMCI0682-01ND
2022-11-21SMCK0693-01ND
2023-01-18SMDA0450-01ND