Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Falfurrias Utility Board

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND10ND
2020ND10ND
2021ND50ND
2022ND10ND
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
2018-02-12AE13396ND
2018-02-12AE13397ND
2018-06-14AE30098ND
2018-06-14AE30099ND
2018-11-05AE45283ND
2019-11-07AE88969ND
2020-08-17AF23919ND
2021-05-26AF55962ND
2021-11-10Q2131711001ND
2021-11-10Q2131711002ND
2021-11-10Q2131711003ND
2021-11-10Q2131711004ND
2022-06-30AG03162ND
2023-04-12AG36654ND