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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Columbus

Chloromethane is an industrial solvent, aerosol propellant and a refrigerant. It also forms as a byproduct of water disinfection. The EPA classifies chloromethane as possibly carcinogenic to humans.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND30ND
2014ND90ND
2015ND20ND
2016ND20ND
2017ND20ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 2.69 ppb

The EWG Health Guideline of 2.69 ppb for chloromethane was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2012-05-01AH57752ND
2012-11-05AH83257ND
2013-02-05AH88452ND
2013-02-05AH88451ND
2013-10-02AI19612ND
2014-01-20AI26898ND
2014-01-20AI26899ND
2014-02-04201402050222AMND
2014-05-05AI39470ND
2014-05-06201405080339AMND
2014-07-30AI47500ND
2014-08-18201408190494AMND
2014-11-03AI58784ND
2014-11-11201411120138AMND
2015-03-24AI69582ND
2015-03-24AI69581ND
2016-04-25AJ10827ND
2016-04-25AJ10826ND
2017-06-13AJ57616ND
2017-08-07AJ63013ND