Know Your Environment. Protect Your Health.

Hexachlorobenzene (HCB)

Dierks Water Works

Hexachlorobenzene is a cancer-causing, neurotoxic and hormone-disrupting chemical used as a pesticide until 1984. It is still found in landfills and hazardous waste sites, and can be detected in people.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019N/A00N/A
2020N/A00N/A
2021ND40ND
2022ND50ND
2023ND20ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.03 ppb

The EWG Health Guideline of 0.03 ppb for hexachlorobenzene 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 cancer.

EPA Maximum Contaminant
Level (MCL): 1 ppb

The legal limit for hexachlorobenzene, established in 1992, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer due to hexachlorobenzene exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2018-04-2418115001506ND
2021-04-1421105010306ND
2021-05-2521147007901ND
2021-08-0321217001901ND
2021-10-1921294001301ND
2022-01-1122013001201ND
2022-04-20O197084-OGC-1ND
2022-08-24O201154-OGC-1ND
2022-10-25O203130-OGC-1ND
2022-11-16O203928-OGC-1ND
2023-01-11O205155-OGC-1ND
2023-05-15O209162-OGC-1ND