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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

City of Humble

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

 

39

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND70ND
2014ND70ND
2015ND50ND
2016ND50ND
2017ND50ND
2018ND50ND
2019ND50ND

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
2013-09-162897698ND
2013-09-162897707ND
2013-09-162897766ND
2013-09-162897796ND
2013-09-162897739ND
2013-09-162897716ND
2013-12-032939520ND
2014-03-202997019ND
2014-03-202996227ND
2014-03-202995901ND
2014-03-202995835ND
2014-03-202996249ND
2014-03-202995721ND
2014-11-173140542ND
2015-01-20AC76796ND
2015-01-20AC76784ND
2015-01-20AC76780ND
2015-01-20AC76800ND
2015-01-20AC76798ND
2016-01-21AD19313ND
2016-01-21AD19307ND
2016-01-21AD19315ND
2016-01-21AD19317ND
2016-01-21AD19309ND
2017-01-05AD63231ND
2017-01-05AD63233ND
2017-01-05AD63235ND
2017-01-05AD63263ND
2017-04-21AD80683ND
2018-01-19AE09579ND
2018-01-19AE09595ND
2018-01-19AE09539ND
2018-04-03AE21021ND
2018-04-03AE21019ND
2019-01-15AE49863ND
2019-01-15AE49877ND
2019-01-15AE49873ND
2019-01-15AE49879ND
2019-01-15AE49853ND