Know Your Environment. Protect Your Health.

Chloromethane

Waterbury Water Department

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND20ND
2016N/A00N/A
2017N/A00N/A
2018ND10ND
2019N/A00N/A
20200.500 ppb110.500 ppb
2021ND10ND
2022ND10ND
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
2014-07-16200399942ND
2014-10-16200406350ND
2015-01-22200411021ND
2015-04-22200415506ND
2018-10-18RWA200509712VOC1ND
2020-09-15RWA2005902950.500 ppb
2021-09-14RWA300059415ND
2022-09-14RWA300253184ND
2023-10-25300436422423ND