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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

North Penn Water Authority

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.

 

30

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
2015ND300ND
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
2015-01-133170230ND
2015-01-133170137ND
2015-01-133170067ND
2015-01-133170239ND
2015-01-133170212ND
2015-01-133170185ND
2015-01-133170040ND
2015-01-133170159ND
2015-01-133170001ND
2015-01-133170103ND
2015-01-133170086ND
2015-01-133170199ND
2015-02-023179908ND
2015-02-023179890ND
2015-04-083220956ND
2015-07-143282248ND
2015-07-143282216ND
2015-07-143282149ND
2015-07-143282225ND
2015-07-143282162ND
2015-07-143282198ND
2015-07-143282239ND
2015-07-143282189ND
2015-07-143282180ND
2015-07-143282140ND
2015-07-143282207ND
2015-07-143282131ND
2015-07-143282171ND
2015-07-143282232ND
2015-10-073336891ND