Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Monochlorobenzene (chlorobenzene)

Holden Water Division, DPW

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.

 

49

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
2013ND80ND
2014ND80ND
2015ND80ND
2016ND90ND
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 Result
2012-01-05ND
2012-05-08ND
2012-05-08ND
2012-05-08ND
2012-05-08ND
2012-06-11ND
2012-08-22ND
2012-11-20ND
2013-02-20ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-08-21ND
2013-11-18ND
2014-02-18ND
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-08-20ND
2014-11-19ND
2015-02-18ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-08-18ND
2015-11-17ND
2016-02-02ND
2016-02-16ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-09-06ND
2016-11-15ND
2017-02-21ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-08-15ND
2017-11-21ND