Know Your Environment. Protect Your Health.

Chloromethane

Pasco Water Department

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
2013ND80ND
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
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
2013-02-13WA97-SE1-13-02592-6058ND
2013-02-13WA97-SE1-13-02593-6059ND
2013-05-15WA97-SE2-13-08414-19444ND
2013-05-15WA97-SE2-13-08414-19443ND
2013-08-13WA97-SE3-13-15009-34226ND
2013-08-13WA97-SE1-13-15009-34225ND
2013-11-12WA97-SE4-13-21552-48916ND
2013-11-12WA97-SE4-13-21552-48915ND
2022-07-184325357ND