Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Concho Rural Water Pecan Creek

NOTE: Concho Rural Water Pecan Creek purchases water from City of San Angelo which is required to test for hexachlorocyclopentadiene. Sample information shown below was taken by City of San Angelo.

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND30ND
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: Concho Rural Water Pecan Creek purchases water from City of San Angelo which is required to test for hexachlorocyclopentadiene. Sample information shown below was taken by City of San Angelo.

Date Lab ID Result
2018-02-28Q1808687003ND
2019-05-07Q1920785004ND
2020-02-18Q2006105003ND
2021-04-27Q2110656001ND
2021-07-20Q2119111001ND
2021-11-22Q2132528001ND
2022-02-14Q2205298001ND
2022-05-02Q2213012001ND
2023-02-15Q2306325008ND