Know Your Environment. Protect Your Health.

Chloromethane

CTWC - Unionville System

NOTE: CTWC - Unionville System purchases water from Metropolitan District Commission which is required to test for chloromethane. Sample information shown below was taken by Metropolitan District Commission.

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND60ND
2014ND60ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND30ND
2019ND20ND
2020ND50ND
2021ND50ND
2022ND40ND
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

NOTE: CTWC - Unionville System purchases water from Metropolitan District Commission which is required to test for chloromethane. Sample information shown below was taken by Metropolitan District Commission.

Date Lab ID Result
2013-07-17201307180742AMND
2013-07-17201307180544AMND
2013-07-17201307180553AMND
2013-10-09201310100586AMND
2013-10-09201310100524AMND
2013-10-09201310100588AMND
2014-01-07201401080365AMND
2014-01-07201401080426AMND
2014-01-07201401080380AMND
2014-04-08201404090441AMND
2014-04-08201404090495AMND
2014-04-08201404090429AMND
2018-07-16AE00927GEND
2018-07-16AE00911GEND
2018-07-16AE00912GEND
2019-06-05AE29314GEND
2019-06-05AE29313GEND
2019-06-05AE29315GEND
2020-06-02AE59301GEND
2020-06-02AE59305GEND
2020-06-02AE59302GEND
2021-11-23V300107450 300107457ND
2021-11-23V300107451 300107463ND
2021-11-29V300109635 300109637ND
2022-12-15V300287072 300287079ND
2022-12-15V300287053 300287060ND
2022-12-15V300287100 300287107ND
2023-12-06V300456533 300456535ND
2023-12-06V300456525 300456531ND
2023-12-06V300456527 300456529ND