Know Your Environment. Protect Your Health.

Monochlorobenzene (chlorobenzene)

Guilford Water 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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND10ND
2020ND30ND
2021ND50ND
2022ND10ND
2023ND70ND

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(104)ND
2018-09-04(104)ND
2018-12-11(104)ND
2019-03-05(104)ND
2020-11-0223491235.00ND
2020-11-0223491214.00ND
2020-11-0223491193.00ND
2021-03-0924197206.00ND
2021-03-0924197227.00ND
2021-03-2924197249.00ND
2021-03-2924197270.00ND
2021-11-0425719763.00ND
2022-04-2526601204.00ND
2023-05-1729053154.00ND
2023-05-1729053175.00ND
2023-05-2429053225.00ND
2023-05-2429053204.00ND
2023-08-0129447940.00ND
2023-08-0129447960.00ND
2023-08-0129447920.00ND