Know Your Environment. Protect Your Health.

Chloromethane

Pierce, City of

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.

 

7

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019N/A00N/A
2020ND20ND
2021ND10ND
2022ND10ND
20230.275 ppb21ND - 0.550 ppb

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
2018-06-19541776ND
2020-12-01703338ND
2020-12-01703337ND
2021-06-14729276ND
2022-10-03829488ND
2023-12-048916210.550 ppb
2023-12-04891620ND