Know Your Environment. Protect Your Health.

Monochlorobenzene (chlorobenzene)

St Charles Water District 1 East Bank

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND80ND
2020ND20ND
2021ND40ND
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
2018-01-2335370117001ND
2018-01-2335370117001ND
2019-01-2235444037001ND
2019-01-2235444038001ND
2019-01-2235444037001ND
2019-01-2235444038001ND
2019-09-0535495382002ND
2019-09-0535495382001ND
2019-09-0535495382002ND
2019-09-0535495382001ND
2020-03-0535535509001ND
2020-03-0535535509002ND
2021-01-2835608065001ND
2021-01-2835608065002ND
2021-03-1035618304001ND
2021-03-1035618304002ND
2022-02-0235694868001ND
2022-02-0235694870001ND
2023-03-2035787602001ND
2023-03-2035787604001ND