Know Your Environment. Protect Your Health.

Chloromethane

Sammamish Plateau Water and Sewer

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2015ND130ND
2016N/A00N/A
2017N/A00N/A
2018ND20ND
2019ND20ND
2020N/A00N/A
2021N/A00N/A
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

Date Lab ID Result
2015-03-3035181633003AMND
2015-03-3035181633005AMND
2015-03-3035181633007AMND
2015-03-3035181633001AMND
2015-03-3135181843001AMND
2015-03-3135181843003AMND
2015-03-3135181843005AMND
2015-09-0335205946001AMND
2015-09-0335205946007AMND
2015-09-0335205946005AMND
2015-09-0335205946009AMND
2015-09-0335205946003AMND
2015-09-3035209763001AMND
2018-08-22ND
2018-08-22ND
2019-09-18ND
2019-10-30ND
2022-08-174365563ND
2022-08-174365564ND