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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Aqua Pa Uwchlan

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
2012N/A00N/A
2013N/A00N/A
2014N/A00N/A
2015ND160ND
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
2015-03-25AE70015ND
2015-03-25AE70012ND
2015-03-25AE70009ND
2015-03-25AE69997ND
2015-03-25AE70000ND
2015-03-25AE70003ND
2015-03-25AE70006ND
2015-06-04AE78272ND
2015-09-16AE92713ND
2015-09-16AE92716ND
2015-09-16AE92710ND
2015-09-16AE92722ND
2015-09-16AE92719ND
2015-09-16AE92725ND
2015-09-16AE92728ND
2015-12-11AF02244ND