Know Your Environment. Protect Your Health.

Chloromethane

Winchester 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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND30ND
2016N/A00N/A
2017N/A00N/A
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND20ND
2023ND30ND

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 Result
2014-11-24ND
2015-02-16ND
2015-07-14ND
2015-08-17ND
2018-01-08ND
2019-01-09ND
2020-01-09ND
2021-01-07ND
2022-01-12ND
2022-01-12ND
2023-01-09ND
2023-01-09ND
2023-01-09ND