Know Your Environment. Protect Your Health.

Chloromethane

City of Olympia

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
2013ND160ND
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021ND20ND
2022N/A00N/A
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
2013-02-14WA97-SE1-13-02624-6123ND
2013-05-20WA97-SE1-13-08686-20033ND
2013-05-20WA97-SE1-13-08686-20032ND
2013-05-20WA97-SE1-13-08686-20030ND
2013-05-20WA97-SE1-13-08686-20031ND
2013-05-20WA97-SE1-13-08686-20035ND
2013-05-20WA97-SE1-13-08686-20034ND
2013-05-20WA97-SE2-13-08686-20029ND
2013-08-05WA97-SE3-13-14093-32129ND
2013-11-13WA97-SE2-13-21665-49257ND
2013-11-13WA97-SE2-13-21665-49256ND
2013-11-13WA97-SE4-13-21665-49255ND
2013-11-13WA97-SE2-13-21665-49258ND
2013-11-13WA97-SE2-13-21665-49261ND
2013-11-13WA97-SE2-13-21665-49259ND
2013-11-13WA97-SE2-13-21665-49260ND
2021-03-294095904ND
2021-05-044112960ND