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EWG's Tap Water Database

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Chloromethane

Del-Co Water Company Inc.

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011N/A00N/A
2012N/A00N/A
2013N/A00N/A
2014ND100ND
2015ND20ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 2.69 ppb

The 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
2014-05-05201405060353AMND
2014-05-13201405140518AMND
2014-05-13201405140512AMND
2014-05-21201405220455AMND
2014-08-05201408060357AMND
2014-08-12201408130376AMND
2014-08-19201408210450AMND
2014-11-17201411180487AMND
2014-11-17201411180174AMND
2014-11-18201411190573AMND
2015-02-10201502110515AMND
2015-02-11201502120616AMND