Know Your Environment. Protect Your Health.

Hexachlorobenzene (HCB)

City of Caldwell

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND90ND
2020N/A00N/A
2021ND50ND
2022ND120ND
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
2019-08-06S1938597ND
2019-08-06S1938599ND
2019-08-06S1938601ND
2019-08-06S1938594ND
2019-08-06S1938591ND
2019-08-06S1938593ND
2019-08-19S1941179ND
2019-08-19S1941172ND
2019-08-20S1941326ND
2021-06-30S2132702ND
2021-10-28S2158342ND
2021-10-28S2158341ND
2021-10-28S2158343ND
2021-11-15S2162154ND
2022-06-29S2231081ND
2022-07-06S2231994ND
2022-07-06S2231993ND
2022-07-06S2232001ND
2022-07-13S2233509ND
2022-10-12S2251056ND
2022-10-12S2251055ND
2022-10-12S2251041ND
2022-10-12S2251030ND
2022-10-19S2252265ND
2022-10-19S2252264ND
2022-10-19S2252266ND