Know Your Environment. Protect Your Health.

Monochlorobenzene (chlorobenzene)

North Castle Water District #4

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND120ND
2021ND40ND
2022ND40ND
2023ND80ND

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
2020-02-25AW03853-POCSND
2020-02-25AW03861-POCSND
2020-02-25AW03855-POCSND
2020-06-24AW11973-POCSND
2020-06-24AW11974-POCSND
2020-06-24AW11976-POCSND
2020-06-24AW11975-POCSND
2020-07-13AW13180-POCSND
2020-09-04AW17230-POCSND
2020-09-04AW17235-POCSND
2020-09-04AW17233-POCSND
2020-09-04AW17234-POCSND
2021-03-02AX04052-POCSND
2021-03-03AX04224-POCSND
2021-03-03AX04226-POCSND
2021-07-06AX13097-POCSND
2022-03-01AY03618-POCSND
2022-03-01AY03622-POCSND
2022-03-01AY03616-POCSND
2022-07-19AY12490-POCSND
2023-03-21AZ05015-POCSND
2023-03-21AZ05017-POCSND
2023-03-22AZ05102-POCSND
2023-07-25AZ13469-POCSND
2023-08-01AZ14120-POCSND
2023-08-01AZ14121-POCSND
2023-09-05AZ 16355-POCSND
2023-09-05AZ 16358-POCSND