Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

City of Point

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
20210.0667 ppb32ND - 0.1000 ppb
2022ND20ND
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
2018-05-03Q1818077001ND
2019-02-20Q1907449001ND
2020-03-17Q2011581002ND
2021-06-16Q21158060010.1000 ppb
2021-09-15Q2125276001ND
2021-11-04Q21310000010.1000 ppb
2022-02-07Q2204049001ND
2022-05-18Q2214722001ND
2023-03-06Q2308662003ND