Know Your Environment. Protect Your Health.

Chloromethane

City of Sunnyside

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0774 ppb102ND - 0.473 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND10ND
2019ND10ND
2020N/A00N/A
2021ND30ND
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
2014-03-31WA97-SE1-14-05465-134070.473 ppb
2014-03-31WA97-SE1-14-05465-13408ND
2014-03-31WA97-SE1-14-05465-13406ND
2014-03-31WA97-SE1-14-05465-13410ND
2014-03-31WA97-SE1-14-05465-13409ND
2014-09-03WA97-SE2-14-17266-39554ND
2014-09-03WA97-SE2-14-17266-39553ND
2014-09-03WA97-SE2-14-17266-39553A0.301 ppb
2014-09-03WA97-SE2-14-17266-39555ND
2014-09-03WA97-SE2-14-17795-40724ND
2018-10-03ND
2019-07-02ND
2021-03-094087470ND
2021-05-124118792ND
2021-05-124118806ND
2022-07-214325368ND
2022-07-214325371ND