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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

United Water Pennsylvania

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND110ND
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
2014-02-041070357001ND
2014-02-041070260001ND
2014-02-041070313001ND
2014-05-052005008001ND
2014-05-052005008006ND
2014-08-042021476001ND
2014-08-042021476006ND
2014-11-05AE57158ND
2014-11-052038591001ND
2014-11-05AE57156ND
2014-11-052038592001ND