Know Your Environment. Protect Your Health.

Chloromethane

City of Redmond Water System

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND90ND
2015ND30ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019ND40ND
2020N/A00N/A
2021ND10ND
2022ND10ND
2023N/A00N/A

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
2014-06-25A4E1998-11AND
2014-06-25A4E1998-01AND
2014-06-25A4E1998-21AND
2014-06-25A4E1998-16AND
2014-09-24A4H1630-01AND
2014-12-17A4K1345-06AND
2014-12-17A4K1345-01AND
2014-12-17A4K1345-11AND
2014-12-17A4K1348-01AND
2015-03-04A5B1435-01AND
2015-08-18A5G2132-01AND
2015-12-15A5K1615-01AND
2019-07-09ND
2019-07-09ND
2019-07-09ND
2019-07-09ND
2021-09-024178935ND
2022-07-274325450ND