Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Chloromethane

Denver Water Board

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

 

51

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND120ND
2014ND310ND
2015ND80ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
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 Result
2013-02-05ND
2013-02-05ND
2013-03-05ND
2013-05-06ND
2013-05-06ND
2013-05-07ND
2013-08-05ND
2013-08-06ND
2013-08-06ND
2013-11-04ND
2013-11-04ND
2013-12-03ND
2014-01-07ND
2014-04-08ND
2014-04-08ND
2014-05-06ND
2014-05-06ND
2014-05-27ND
2014-05-27ND
2014-05-27ND
2014-06-03ND
2014-06-03ND
2014-06-03ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-08-05ND
2014-08-05ND
2014-08-05ND
2014-08-18ND
2014-08-18ND
2014-08-18ND
2014-09-02ND
2014-09-02ND
2014-09-06ND
2014-10-07ND
2014-10-07ND
2014-11-04ND
2014-11-04ND
2014-11-20ND
2014-11-20ND
2014-12-02ND
2014-12-02ND
2015-01-06ND
2015-01-06ND
2015-02-03ND
2015-02-03ND
2015-02-18ND
2015-02-18ND
2015-03-03ND
2015-03-03ND