Know Your Environment. Protect Your Health.

Chloromethane

Town of Woodsboro

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)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
201910.4 ppb338.89 ppb - 11.2 ppb
20200.900 ppb110.900 ppb
20215.15 ppb115.15 ppb
2022N/A00N/A
20230.850 ppb110.850 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
2019-05-30E1900408700111.0 ppb
2019-05-30E1900408700411.2 ppb
2019-05-30E190040870068.89 ppb
2020-09-28E210008610040.900 ppb
2021-06-30E220000090015.15 ppb
2023-08-29E24000771010.850 ppb