Know Your Environment. Protect Your Health.

Chloromethane

Monson Water System

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.

 

8

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
2019ND40ND
2020ND20ND
2021ND10ND
2022N/A00N/A
2023ND10ND

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
2019-03-29CA5403212_001_001-201903290920ND
2019-06-20CA5403212_001_001-201906201220ND
2019-09-06CA5403212_001_001-201909061145ND
2019-12-17CA5403212_001_001-201912171420ND
2020-03-06CA5403212_001_001-202003061310ND
2020-06-16CA5403212_001_001-202006161330ND
2021-09-28CA5403212_001_001-202109281115ND
2023-09-11CA5403212_001_001-202309111230ND