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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

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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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015ND30ND
2016ND30ND
2017N/A00N/A
2018ND30ND
2019ND30ND

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
2015-10-28B15102474-001CND
2015-10-28B15102474-002CND
2015-10-28B15102474-003CND
2016-02-05B16020694-001CND
2016-02-05B16020694-002CND
2016-02-05B16020694-003CND
2018-02-08B18021035-001AND
2018-02-08B18021035-002AND
2018-02-08B18021035-003AND
2019-03-25H19030459-001FND
2019-03-25H19030459-002FND
2019-03-25H19030459-003FND