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EWG's Tap Water Database — 2019 UPDATE

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Monochlorobenzene (chlorobenzene)

Tempe Water Supply Corporation 1

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND30ND
2015ND60ND
2016ND40ND
2017ND40ND

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
2012-02-29AB82330ND
2012-02-29AB82328ND
2013-02-26AC11569ND
2013-02-26AC11571ND
2014-01-15AC39002ND
2014-01-15AC38994ND
2014-01-15AC38992ND
2015-02-24AC81713ND
2015-02-24AC81699ND
2015-02-24AC81709ND
2015-02-24AC81697ND
2015-09-10AD06572ND
2015-12-03AD15456ND
2016-02-25AD25795ND
2016-02-25AD25791ND
2016-02-25AD25783ND
2016-02-25AD25785ND
2017-06-01AD86432ND
2017-06-01AD86412ND
2017-06-01AD86408ND
2017-06-01AD86426ND