Know Your Environment. Protect Your Health.

Chloromethane

City of Bellingham Water Division

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND10ND
2014ND30ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND10ND
2019ND10ND
2020N/A00N/A
2021ND10ND
2022ND10ND
2023ND10ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2013-10-01WA97-SE1-13-18755-42559ND
2014-04-08WA97-SE3-14-06134-14920ND
2014-07-08WA97-SE4-14-12580-29606ND
2014-11-04WA97-SE2-14-25244-57320ND
2018-07-31ND
2019-05-07ND
2021-05-274210772ND
2022-06-234331423ND
2023-08-154541697ND