Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Chloromethane

Lake Mills Waterworks

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND20ND
2014ND30ND
2015ND10ND
2016ND10ND
2017ND20ND

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
2012-08-22679848ND
2013-02-18706433ND
2013-02-19706435ND
2014-09-10818273ND
2014-09-10818275ND
2014-10-13825297ND
2015-04-15854564ND
2016-02-03903943ND
2017-03-08976729ND
2017-03-08976726ND