Know Your Environment. Protect Your Health.

Chloromethane

Ten Mile and Pleasant Valley Wua

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)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND10ND
202024.6 ppb1124.6 ppb
20215.77 ppb52ND - 19.0 ppb
2022ND10ND
2023N/A00N/A

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
2019-10-211910208-01ND
2020-11-162011146-0124.6 ppb
2021-01-072101100-0119.0 ppb
2021-03-242103214-019.83 ppb
2021-06-162106250-01ND
2021-10-082110131-01ND
2021-12-072112072-01ND
2022-03-082203099-01ND