Know Your Environment. Protect Your Health.

Hexachlorobenzene (HCB)

California Water Service Company Oak Hills

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.

 

7

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2018-05-03CA2710019_001_001-201805031433ND
2019-06-19CA2710019_008_008-201906191316ND
2019-09-12CA2710019_003_003-201909121404ND
2021-06-29CA2710019_001_001-202106291352ND
2021-09-22CA2710019_001_001-202109221106ND
2022-06-22CA2710019_008_008-202206221338ND
2022-09-22CA2710019_003_003-202209221410ND