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EWG's Tap Water Database — 2019 UPDATE

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Monochlorobenzene (chlorobenzene)

St. Louis City

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND20ND
2015ND20ND
2016ND30ND
2017N/A00N/A

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
2012-06-28CRCW062812M524ND
2012-06-28HBCB062812M524ND
2013-10-22CRCW102213M524ND
2013-10-22HBCB102213M524ND
2014-05-28AC26115ND
2014-05-28AC26114ND
2015-06-01AC47391ND
2015-06-01AC47390ND
2016-06-06AC77510ND
2016-06-06AC75867ND
2016-06-06AC75866ND