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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

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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.

MORE ABOUT THIS CONTAMINANT

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND120ND
2014N/A00N/A
2015ND180ND
2016N/A00N/A
2017N/A00N/A
2018ND180ND
2019N/A00N/A

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
2013-05-143593444005AMND
2013-05-143593444001AMND
2013-05-143593444003AMND
2013-05-143593444012AMND
2013-05-143593444007AMND
2013-05-143593444009AMND
2013-10-2835113924005AMND
2013-10-2835113924003AMND
2013-10-2835113924001AMND
2013-10-2835113924009AMND
2013-10-2835113924011AMND
2013-10-2835113924007AMND
2015-01-22AC41398ND
2015-01-22AC41404ND
2015-01-22AC41397ND
2015-01-22AC41402ND
2015-01-22AC41412ND
2015-01-22AC41399ND
2015-01-22AC41401ND
2015-01-22AC41411ND
2015-01-22AC41407ND
2015-01-22AC41408ND
2015-01-22AC41410ND
2015-01-22AC41406ND
2015-01-22AC41414ND
2015-01-22AC41400ND
2015-01-22AC41405ND
2015-01-22AC41409ND
2015-01-22AC41403ND
2015-01-22AC41413ND
2018-01-24AD12004ND
2018-01-24AD12001ND
2018-01-24AD12000ND
2018-01-24AD11998ND
2018-01-24AD11999ND
2018-01-24AD12005ND
2018-01-24AD12002ND
2018-01-24AD12003ND
2018-01-24AD12008ND
2018-01-24AD12006ND
2018-01-24AD12007ND
2018-01-24AD12016ND
2018-01-24AD12015ND
2018-01-24AD12014ND
2018-01-24AD12012ND
2018-01-24AD12011ND
2018-01-24AD12010ND
2018-01-24AD12009ND