Know Your Environment. Protect Your Health.

Monochlorobenzene (chlorobenzene)

Hanson Water Department

NOTE: Hanson Water Department purchases water from Brockton Water Commission which is required to test for monochlorobenzene (chlorobenzene). Sample information shown below was taken by Brockton Water Commission.

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019ND60ND
2020ND50ND
2021ND70ND
2022ND10ND
2023ND10ND

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

NOTE: Hanson Water Department purchases water from Brockton Water Commission which is required to test for monochlorobenzene (chlorobenzene). Sample information shown below was taken by Brockton Water Commission.

Date Result
2018-03-06ND
2018-03-06ND
2019-03-11ND
2019-03-12ND
2020-03-10ND
2020-03-24ND
2021-03-03ND
2021-04-16ND
2022-03-02ND
2023-03-01ND