Know Your Environment. Protect Your Health.

Monochlorobenzene (chlorobenzene)

Bear Valley Joint Authority

Monochlorobenzene is used as a solvent for pesticides, a degreasing agent and an intermediate for manufacturing other chemicals. It causes liver and kidney damage in studies of laboratory animals.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND30ND
2020ND40ND
2021ND20ND
2022ND20ND
2023ND20ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 70 ppb

The EWG Health Guideline of 70 ppb for monochlorobenzene 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 internal organs.

EPA Maximum Contaminant
Level (MCL): 100 ppb

The legal limit for monochlorobenzene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1960s.

ppb = parts per billion

All test results

Date Lab ID Result
2018-05-29(102)ND
2018-07-17(102)ND
2018-10-16(101) TREATMND
2018-11-27(102)ND
2019-02-19(102)ND
2019-11-069K07106-01ND
2019-12-179L18235-01ND
2020-01-2921624711.00ND
2020-04-1522165884.00ND
2020-07-2922750960.00ND
2020-09-2323137073.00ND
2021-09-2825358609.00ND
2021-09-2825358642.00ND
2022-09-1427594697.00ND
2022-10-1327779648.00ND
2023-09-0629840913.00ND
2023-09-0629840947.00ND