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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Daphne

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

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND140ND
2014ND20ND
2015N/A00N/A
2016ND50ND
2017ND20ND
2018ND20ND
2019ND80ND

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
2013-02-182782970ND
2013-02-182782979ND
2013-02-182782961ND
2013-02-182783354ND
2013-02-182782932ND
2013-02-192782952ND
2013-02-192782941ND
2013-08-222886201ND
2013-08-222885969ND
2013-08-222886218ND
2013-08-222886031ND
2013-08-222886020ND
2013-08-222885979ND
2013-08-222885990ND
2014-01-13140114012-1ND
2014-01-13140114012-2ND
2016-01-13160114026-2ND
2016-01-13160114026-3ND
2016-01-13160114026-1ND
2016-04-13160414036-1ND
2016-04-13160414036-2ND
2017-01-12170113027-1ND
2017-01-12170113027-2ND
2018-09-2518090667-001AND
2018-11-0518110119-001AND
2019-01-1619010491-003AND
2019-01-1619010491-002AND
2019-01-1619010491-001AND
2019-04-0819040336-001AND
2019-06-1320108286001_IVOCND
2019-06-1320108286002_IVOCND
2019-09-1220121497001_IVOCND
2019-10-1420126106001_IVOCND