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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Portage

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.

MORE ABOUT THIS CONTAMINANT

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND220ND
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND110ND
2019N/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
2013-04-15714491-8578ND
2013-04-15714519-8578ND
2013-04-15714506-8578ND
2013-04-15714508-8578ND
2013-04-15714500-8578ND
2013-04-15714516-8578ND
2013-04-16715065-8659ND
2013-04-16715135-8659ND
2013-04-16715063-8627ND
2013-04-16715094-8659ND
2013-04-16715067-8659ND
2013-10-09751698-10019ND
2013-10-09751807-10019ND
2013-10-09751793-10019ND
2013-10-09751790-10019ND
2013-10-09751702-10019ND
2013-10-09751704-10019ND
2013-10-09751700-10032ND
2013-10-09751714-10019ND
2013-10-09751708-10019ND
2013-10-09751706-10019ND
2013-10-10751995-10032ND
2018-05-22LLH81760ND
2018-05-22LLH81757ND
2018-05-22LLH81756ND
2018-05-22LLH81758ND
2018-05-22LLH81759ND
2018-05-22LLH81762ND
2018-05-22LLH81761ND
2018-06-25LLH88663ND
2018-06-25LLH88664ND
2018-08-22LLI00614ND
2018-09-20LLI06939ND