Know Your Environment. Protect Your Health.

Chloromethane

Arlington Water Department

NOTE: Arlington Water Department purchases water from SNO PUD 1 - Lake Stevens which is required to test for chloromethane. Sample information shown below was taken by SNO PUD 1 - Lake Stevens.

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
2013ND80ND
2014ND20ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019ND20ND
2020N/A00N/A
2021ND20ND
2022ND20ND
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

NOTE: Arlington Water Department purchases water from SNO PUD 1 - Lake Stevens which is required to test for chloromethane. Sample information shown below was taken by SNO PUD 1 - Lake Stevens.

Date Lab ID Result
2014-01-22WA97-SE1-14-01298-3400ND
2014-04-15WA97-SE2-14-06585-15943ND
2014-04-1697-SE1-14-06586-15945ND
2014-07-22WA97-SE3-14-13616-31731ND
2014-10-27WA97-SE4-14-21143-47786ND
2014-10-28WA98-SE2-14-21311-48224ND
2019-11-14ND
2019-11-14ND
2022-05-234286326ND
2022-05-234286327ND