Know Your Environment. Protect Your Health.

Monochlorobenzene (chlorobenzene)

Town of Ridgecrest Water Supply

NOTE: Town of Ridgecrest Water Supply purchases water from Town of Ferriday Water System which is required to test for monochlorobenzene (chlorobenzene). Sample information shown below was taken by Town of Ferriday Water System.

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
2018N/A00N/A
2019ND80ND
2020ND20ND
2021N/A00N/A
2022ND40ND
2023N/A00N/A

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: Town of Ridgecrest Water Supply purchases water from Town of Ferriday Water System which is required to test for monochlorobenzene (chlorobenzene). Sample information shown below was taken by Town of Ferriday Water System.

Date Lab ID Result
2019-09-1635498099001ND
2019-09-1635498099002ND
2019-09-1635498099003ND
2019-09-1635498099004ND
2019-09-1635498099001ND
2019-09-1635498099002ND
2019-09-1635498099003ND
2019-09-1635498099004ND
2022-08-2335742847001ND
2022-08-2335742847002ND
2022-08-2335742847003ND
2022-08-2335742847004ND