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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Connecticut Water Company - Shoreline Region-chester 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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND80ND
2015ND20ND
2016ND20ND
2017ND20ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2012-01-0481962VOC1ND
2012-04-2584275VOC1ND
2013-01-08247VOC1ND
2013-06-209056VOC1ND
2014-01-21103699PND
2014-01-21103698PND
2014-01-29140130CWCAVOC1ND
2014-05-06106556PND
2014-05-146604VOC1ND
2014-07-21107770PND
2014-07-21107769PND
2014-10-20109406PND
2015-02-12BH73176VOC1ND
2015-06-17BJ32481VOC1ND
2016-02-11BK64356VOC1ND
2016-05-25BN40398VOC1ND
2017-01-18BX33133VOC1ND
2017-11-15BZ42288VOC1ND