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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

City of Vancouver

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.

MORE ABOUT THIS CONTAMINANT

 

35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND180ND
2014ND10ND
2015N/A00N/A
2016ND60ND
2017N/A00N/A
2018N/A00N/A
2019ND100ND

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
2013-05-28201305290255AMND
2013-05-28201305290241AMND
2013-05-28201305290221AMND
2013-05-28201305290217AMND
2013-05-28201305290260AMND
2013-05-28201305290239AMND
2013-05-28201305290226AMND
2013-05-28201305290223AMND
2013-06-17201306180198AMND
2013-11-19201311200327AMND
2013-11-19201311200369AMND
2013-11-19201311200343AMND
2013-11-19201311200323AMND
2013-11-19201311200341AMND
2013-11-19201311200325AMND
2013-11-19201311200401AMND
2013-11-19201311200527AMND
2013-11-19201311200397AMND
2014-11-1890237ND
2016-11-08ND
2016-11-08ND
2016-11-08ND
2016-11-08ND
2016-11-08ND
2016-11-08ND
2019-05-30ND
2019-05-30ND
2019-12-10ND
2019-12-10ND
2019-12-10ND
2019-12-10ND
2019-12-10ND
2019-12-10ND
2019-12-10ND
2019-12-10ND