Monochlorobenzene (chlorobenzene)

Indio 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.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2013	N/A	0	N/A
2014	N/A	0	N/A
2015	N/A	0	N/A
2016	ND	10	ND
2017	N/A	0	N/A
2018	ND	8	ND
2019	ND	11	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2016-08-22	9590-034-1005	ND
2016-08-22	9590-033-1130	ND
2016-08-22	9590-027-0845	ND
2016-08-31	9590-004-0715	ND
2016-08-31	9590-022-0810	ND
2016-08-31	9590-020-0830	ND
2016-08-31	9590-019-1020	ND
2016-08-31	9590-018-0930	ND
2016-08-31	9590-016-1050	ND
2016-08-31	9590-011-0910	ND
2018-02-15	9590-003-1330	ND
2018-02-15	9590-010-1220	ND
2018-02-15	9590-008-1245	ND
2018-02-15	9590-023-1125	ND
2018-05-31	9590-017-1115	ND
2018-05-31	9590-007-1200	ND
2018-08-28	9590-028-1035	ND
2018-11-29	9590-021-1240	ND
2019-04-16	9590-009-0445	ND
2019-08-19	9590-027-1035	ND
2019-08-21	9590-020-0615	ND
2019-08-22	9590-033-1255	ND
2019-08-26	9590-016-1005	ND
2019-08-26	9590-004-0730	ND
2019-08-26	9590-022-1709	ND
2019-08-26	9590-018-0950	ND
2019-08-27	9590-034-0625	ND
2019-08-28	9590-019-0845	ND
2019-08-28	9590-011-0730	ND