Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Quinlan South Subdivision

NOTE: Quinlan South Subdivision purchases water from Cash SUD which is required to test for hexachlorocyclopentadiene. Sample information shown below was taken by Cash SUD.

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND40ND
2021ND10ND
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

NOTE: Quinlan South Subdivision purchases water from Cash SUD which is required to test for hexachlorocyclopentadiene. Sample information shown below was taken by Cash SUD.

Date Lab ID Result
2018-02-12Q1805646006ND
2019-02-21Q1907745001ND
2020-02-04Q2004530001ND
2021-07-13Q2118249001ND
2022-07-26Q2221173003ND
2023-10-24Q2345749001ND