Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Chloromethane

Cross Valley Water District

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND100ND
2014ND10ND
2015N/A00N/A
2016N/A00N/A
2017N/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 Lab ID Result
2012-06-0120366ND
2012-06-0120369ND
2012-06-0120367ND
2012-06-0120365ND
2012-06-0120368ND
2013-04-03WA97-SE1-13-0536ND
2013-04-03WA97-SE1-13-0536ND
2013-04-03WA97-SE1-13-0536ND
2013-04-03WA97-SE1-1300536ND
2013-04-03WA97-SE1-13-0536ND
2013-10-09WA97-SE2-13-1948ND
2013-10-09WA97-SE2-13-1948ND
2013-10-09WA97-SE2-13-1948ND
2013-10-09WA97-SE2-13-1948ND
2013-10-09WA97-SE2-13-1948ND
2014-10-1446279ND