Know Your Environment. Protect Your Health.

Chloromethane

Connecticut Water Company - Northern Region-Western 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.

 

36

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND130ND
2014ND10ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND30ND
2019ND20ND
2020ND50ND
2021ND20ND
2022ND80ND
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
2013-06-13201306140131AMND
2013-06-13201306140129AMND
2013-06-17201306180160AMND
2013-06-17201306180139AMND
2013-06-17201306180145AMND
2013-06-17201306180153AMND
2013-09-09201309100270AMND
2013-12-02201312030327AMND
2013-12-02201312030340AMND
2013-12-02201312030338AMND
2013-12-03201312040752AMND
2013-12-19201312200107AMND
2013-12-19201312200095AMND
2014-03-17201403180213AMND
2018-01-23BZ78888VOC1ND
2018-01-31BZ82950VOC1ND
2018-07-13CA89901ND
2019-01-02VOC1 200517309ND
2019-03-15VOC1 200524883ND
2020-01-02VOC1 200561504ND
2020-06-29VOC1 200580772ND
2020-08-11VOC1 200586573ND
2020-09-21VOC1 200591014ND
2020-10-07VOC1 200593218ND
2021-03-05VOC1 200608707ND
2021-09-14300059932 300059934ND
2022-01-24CK22294ND
2022-01-25CK23175ND
2022-01-25CK23176ND
2022-02-01CK27428ND
2022-02-16CK69359ND
2022-08-26CM16199ND
2022-09-08CM25672ND
2022-09-20CM37295ND
2023-01-17CN24238ND
2023-12-13CP67269ND