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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Cumming

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND10ND
2014ND10ND
2015ND50ND
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
2012-03-08AH54598ND
2013-04-04AH98258ND
2014-03-10AI29445ND
2015-01-213174715ND
2015-03-10AI68602ND
2015-04-153225525ND
2015-07-083276496ND
2015-10-143341721ND
2016-03-02AJ07399ND
2017-05-17AJ55604ND