Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

South Grayson Special Utility District

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019N/A00N/A
2020N/A00N/A
2021ND50ND
2022N/A00N/A
2023N/A00N/A

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
2018-02-06Q1804974003ND
2018-05-04Q1818259001ND
2018-10-15Q1840862001ND
2018-10-15Q1840862002ND
2018-10-15Q1840862003ND
2018-10-15Q1840862014ND
2021-06-16Q2115771001ND
2021-11-10Q2131631001ND
2021-11-10Q2131631002ND
2021-11-10Q2131631003ND
2021-11-10Q2131631004ND