Know Your Environment. Protect Your Health.

Chloromethane

Danbury 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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2015-08-2638771 0815ND
2018-02-21210745GEND
2018-02-21210744GEND
2019-08-15VOC1 200545121ND
2019-08-15VOC1 200545122ND
2020-02-20VOC1 200566893ND
2020-02-20VOC1 200566892ND
2020-02-21VOC1 200566982ND
2021-01-21VOC1 200604571ND
2021-01-21VOC1 200604570ND
2022-01-20279326ND
2022-01-20279325ND
2023-02-09306232ND
2023-02-09306231ND