Know Your Environment. Protect Your Health.

Chloromethane

White Rock

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.

 

4

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
201919.5 ppb1119.5 ppb
20209.03 ppb119.03 ppb
20211.61 ppb111.61 ppb
2022N/A00N/A
20231.40 ppb111.40 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
2019-06-12E1900428200119.5 ppb
2020-06-11E200038210019.03 ppb
2021-04-21E210029810011.61 ppb
2023-05-09E23002763071.40 ppb