Know Your Environment. Protect Your Health.

Monochlorobenzene (chlorobenzene)

City of Beaverton

NOTE: City of Beaverton purchases water from Joint Water Commission which is required to test for monochlorobenzene (chlorobenzene). Sample information shown below was taken by Joint 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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND10ND
2021ND20ND
2022ND20ND
2023ND40ND

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: City of Beaverton purchases water from Joint Water Commission which is required to test for monochlorobenzene (chlorobenzene). Sample information shown below was taken by Joint Water Commission.

Date Lab ID Result
2018-02-071809141-VND
2018-11-051884309-VND
2019-04-241928990-VND
2019-11-041981259-VND
2020-04-012021410-VND
2020-11-042074464-VND
2021-04-072123196-VND
2021-11-032180746-VND
2022-03-312221620-VND
2022-11-0222-71086-VND
2023-04-1023-19659-VND
2023-11-0623-67462-VND