Know Your Environment. Protect Your Health.

Monochlorobenzene (chlorobenzene)

Lynnfield Water District (MWRA)

NOTE: Lynnfield Water District (MWRA) purchases water from Massachusetts Water Resources Authority (MWRA) which is required to test for monochlorobenzene (chlorobenzene). Sample information shown below was taken by Massachusetts Water Resources Authority (MWRA).

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
2020ND20ND
2021ND20ND
2022ND30ND
2023ND50ND

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: Lynnfield Water District (MWRA) purchases water from Massachusetts Water Resources Authority (MWRA) which is required to test for monochlorobenzene (chlorobenzene). Sample information shown below was taken by Massachusetts Water Resources Authority (MWRA).

Date Result
2018-10-16ND
2018-10-16ND
2019-10-15ND
2019-10-15ND
2020-10-06ND
2020-10-06ND
2021-10-19ND
2021-10-19ND
2022-10-04ND
2022-10-04ND
2023-10-24ND
2023-10-24ND