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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Bridgestone MUD

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.

 

14

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
2016ND20ND
2017ND30ND
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
2015-03-03AC82587ND
2015-04-17AC88843ND
2015-04-17AC88841ND
2016-02-19AD24409ND
2016-02-19AD24770ND
2017-01-27AD67543ND
2017-01-27AD67547ND
2017-04-28AD81836ND
2018-03-02AE16680ND
2018-05-21AE27028ND
2018-05-21AE27022ND
2019-01-11AE49599ND
2019-01-11AE49595ND
2019-02-22AE55667ND