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EWG's Tap Water Database — 2019 UPDATE

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Monochlorobenzene (chlorobenzene)

San Gabriel County WD

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.

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND90ND
2013ND60ND
2014ND70ND
2015ND50ND
2016ND50ND
2017ND50ND

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
2012-02-073761-001-1005ND
2012-04-189588-007-1100ND
2012-05-013761-001-1135ND
2012-07-033761-001-1040ND
2012-07-179588-009-0915ND
2012-07-179588-010-0930ND
2012-07-179588-011-1015ND
2012-08-073761-001-0000ND
2012-11-073761-001-1120ND
2013-04-109588-007-0915ND
2013-05-243761-020-1125ND
2013-07-159588-009-0950ND
2013-07-159588-010-1005ND
2013-08-139588-011-0945ND
2013-08-139588-001-1015ND
2014-04-089588-007-0940ND
2014-06-173761-020-1020ND
2014-07-149588-009-0900ND
2014-07-149588-010-0915ND
2014-07-149588-011-0945ND
2014-07-159588-001-1000ND
2014-12-059588-020-0910ND
2015-03-179588-020-1050ND
2015-06-119588-007-0905ND
2015-07-169588-010-1000ND
2015-07-169588-001-0940ND
2015-07-169588-011-1020ND
2016-04-139588-007-0940ND
2016-07-189588-011-0950ND
2016-07-189588-009-0925ND
2016-07-189588-010-0935ND
2016-09-159588-020-0910ND
2017-04-139588-007-0925ND
2017-07-179588-009-0905ND
2017-07-179588-011-0945ND
2017-07-179588-010-0925ND
2017-07-179588-020-1025ND