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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

City of Houston Utility District 5 - Kingwood

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

 

42

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND50ND
2014ND80ND
2015ND60ND
2016ND50ND
2017ND40ND
2018ND50ND
2019ND90ND

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
2013-11-121311494-001BND
2013-11-121311449-001BND
2013-11-121311458-001BND
2013-11-121311447-001BND
2013-11-141311459-001BND
2014-03-19AC47591ND
2014-05-121405515-001BND
2014-05-121405470-001BND
2014-05-121405471-001BND
2014-05-121405516-001BND
2014-05-121405475-001BND
2014-05-30AC55685ND
2014-08-15AC63963ND
2015-01-16AC76648ND
2015-06-08AC94920ND
2015-06-08AC94926ND
2015-06-08AC94940ND
2015-06-08AC94934ND
2015-06-08AC94924ND
2016-01-13AD17907ND
2016-01-13AD17915ND
2016-01-13AD17909ND
2016-03-09AD27893ND
2016-03-09AD27891ND
2017-01-11AD64340ND
2017-04-27AD81532ND
2017-04-27AD81542ND
2017-06-28AD88042ND
2018-01-31AE11915ND
2018-01-31AE11911ND
2018-01-31AE11913ND
2018-01-31AE11909ND
2018-01-31AE11903ND
2019-01-22AE50730ND
2019-01-22AE50732ND
2019-01-22AE50744ND
2019-01-22AE50716ND
2019-01-22AE50726ND
2019-03-12AE58060ND
2019-04-11AE62096ND
2019-07-22AE75326ND
2019-10-11AE86479ND