Know Your Environment. Protect Your Health.

Hexachlorobenzene (HCB)

Walnut Grove Utilities

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.

 

38

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND130ND
2020ND70ND
2021ND100ND
2022ND30ND
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
2018-06-12680-153971-1ND
2018-06-13680-154051-1ND
2018-07-03680-154927-1ND
2018-07-10680-155198-1ND
2018-10-16680-159419-1ND
2019-02-26680-165150-1ND
2019-02-26680-165155-1ND
2019-03-05680-165488-1ND
2019-03-05680-165490-1ND
2019-03-12680-165969-1ND
2019-04-02680-167058-1ND
2019-04-02680-167063-1ND
2019-04-09680-167500-1ND
2019-04-09680-167502-1ND
2019-07-16680-171849-1ND
2019-07-16680-171850-1ND
2019-08-07680-172766-1ND
2019-08-07680-172772-1ND
2020-03-11481035ND
2020-03-12481037ND
2020-06-11488369ND
2020-09-02497129ND
2020-09-02497133ND
2020-11-17504181ND
2020-11-17504183ND
2021-03-181034633-01ND
2021-03-181034634-01ND
2021-04-221044869-01ND
2021-04-291052161-01ND
2021-05-061052823-01ND
2021-05-131054055-01ND
2021-09-24810-3698-1ND
2021-09-24810-3699-1ND
2021-09-24810-3700-1ND
2021-10-12810-5182-1ND
2022-03-14FWC0176-01SND
2022-09-28FWJ0039ND
2022-10-26FWJ0180-01ND