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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Monroe

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND50ND
2016ND10ND
2017ND10ND
2018ND10ND
2019ND10ND

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
2014-05-12AI40299ND
2015-01-0628019201ND
2015-03-30AI69822ND
2015-04-0128660601ND
2015-07-0629542601ND
2015-10-0530332401ND
2016-05-02AJ11234ND
2017-06-12AJ57283ND
2018-05-22AJ89933ND
2019-06-03AK18580ND