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EWG's Tap Water Database — 2021 UPDATE

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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.

 

29

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND150ND
2016ND30ND
2017ND30ND
2018ND30ND
2019ND30ND

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
2014-05-13AI40410ND
2014-05-13AI40409ND
2015-03-0435178480003AMND
2015-03-0435178480001AMND
2015-03-0935178704001AMND
2015-03-31AI69891ND
2015-03-31AI69892ND
2015-03-31AI69893ND
2015-06-0935192388009AMND
2015-06-0935192388005AMND
2015-06-1835193802001AMND
2015-09-0935206664001AMND
2015-09-0935206665001AMND
2015-09-0935206663001AMND
2015-12-0835220221012AMND
2015-12-0835220221003AMND
2015-12-0835220221001AMND
2016-05-10AJ11900ND
2016-05-10AJ11899ND
2016-05-10AJ11898ND
2017-06-19AJ57840ND
2017-06-19AJ57839ND
2017-06-19AJ57838ND
2018-06-06AJ90865ND
2018-06-06AJ90864ND
2018-06-06AJ90863ND
2019-05-08AK16824ND
2019-05-08AK16823ND
2019-05-08AK16822ND