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EWG's Tap Water Database — 2019 UPDATE

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Monochlorobenzene (chlorobenzene)

City of Newport Beach

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.

 

39

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND70ND
2013ND70ND
2014ND60ND
2015ND40ND
2016ND70ND
2017ND80ND

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
2012-02-234417-004-0800ND
2012-02-234417-003-0820ND
2012-03-274417-005-0850ND
2012-05-174417-002-0830ND
2012-05-244417-003-0900ND
2012-08-214417-003-1045ND
2012-10-304417-003-0950ND
2013-03-194417-004-0740ND
2013-03-194417-003-0800ND
2013-03-204417-005-0735ND
2013-05-284417-003-1300ND
2013-05-304417-002-0815ND
2013-08-124417-003-1050ND
2013-11-204417-003-0945ND
2014-03-034417-004-0810ND
2014-03-034417-005-0830ND
2014-03-044417-003-0810ND
2014-05-154417-003-0840ND
2014-06-184417-002-1300ND
2014-08-214417-003-0855ND
2015-03-024417-005-0835ND
2015-03-024417-004-0815ND
2015-05-044417-002-1050ND
2015-05-044417-003-1115ND
2016-02-294417-005-0805ND
2016-02-294417-004-1045ND
2016-05-094417-003-0850ND
2016-05-094417-002-0840ND
2016-06-164417-004-1100ND
2016-06-164417-004-1115ND
2016-11-014417-005-0835ND
2017-02-094417-005-0930ND
2017-02-094417-004-0950ND
2017-03-224417-004-1120ND
2017-03-224417-004-1105ND
2017-03-224417-005-1140ND
2017-03-224417-005-1125ND
2017-05-034417-002-1235ND
2017-05-034417-003-1220ND