Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

CTWC - Shoreline Region-Guilford System

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.

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND150ND
2020N/A00N/A
2021ND10ND
2022ND160ND
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
2018-07-09CA86688ND
2019-01-30SOC 200520057ND
2019-06-06SOC 200535308ND
2019-06-06SOC 200535309ND
2019-06-11SOC 200536055ND
2019-06-11SOC 200536054ND
2019-06-19SOC 200542695ND
2019-06-24SOC 200537520ND
2019-07-29SOC 200542348ND
2019-07-30SOC 200542453ND
2019-07-31SOC 200542480ND
2019-07-31SOC 200542466ND
2019-07-31SOC 200542497ND
2019-07-31SOC 200542499ND
2019-07-31SOC 200542468ND
2019-08-14SOC 200544869ND
2021-09-30S300072074 300072088ND
2022-06-14CL56474ND
2022-06-14CL56472ND
2022-06-14CL56470ND
2022-06-15CL57887ND
2022-06-15CL57885ND
2022-06-22CL62297ND
2022-06-28CL66245ND
2022-07-18CL80434ND
2022-07-18CL80436ND
2022-07-18CL80438ND
2022-07-18CL80432ND
2022-07-25CL88838ND
2022-07-25CL88842ND
2022-08-29CM17828ND
2022-08-29CM17831ND
2022-10-19CM66672ND
2023-02-13CN41859ND