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EWG's Tap Water Database

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Chloromethane

Dalton Utilities

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011ND20ND
2012ND20ND
2013ND20ND
2014ND20ND
2015ND150ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 2.69 ppb

The 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
2011-09-06AH39725ND
2011-09-06AH39726ND
2012-05-23AH65294ND
2012-05-23AH65295ND
2013-06-03AI02683ND
2013-06-03AI02682ND
2014-05-13AI40409ND
2014-05-13AI40410ND
2015-03-0435178480001AMND
2015-03-0435178480003AMND
2015-03-0935178704001AMND
2015-03-31AI69891ND
2015-03-31AI69893ND
2015-03-31AI69892ND
2015-06-0935192388005AMND
2015-06-0935192388009AMND
2015-06-1835193802001AMND
2015-09-0935206663001AMND
2015-09-0935206664001AMND
2015-09-0935206665001AMND
2015-12-0835220221012AMND
2015-12-0835220221001AMND
2015-12-0835220221003AMND