Know Your Environment. Protect Your Health.

Chloromethane

Houghton Water District

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20191.60 ppb221.60 ppb
2020N/A00N/A
20211.60 ppb111.60 ppb
20221.30 ppb111.30 ppb
20231.85 ppb221.50 ppb - 2.20 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
2019-06-04EHS1900029625-SR-21.60 ppb
2019-06-06EHS1900029625POCS1.60 ppb
2021-10-05R2110480-0011.60 ppb
2022-11-02R2210597-0011.30 ppb
2023-03-22R2302459-0011.50 ppb
2023-06-07R2305065-0012.20 ppb