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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

City of Bellingham Water Division

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND20ND
2014ND40ND
2015N/A00N/A
2016ND10ND
2017ND10ND

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
2012-05-0816725ND
2013-04-1614792ND
2013-10-01WA97-SE1-13-1875ND
2014-04-08WA97-SE3-14-0613ND
2014-07-08WA97-SE4-14-1258ND
2014-08-0634361ND
2014-11-04WA97-SE2-14-2524ND
2016-05-04ND
2017-08-02ND