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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Winhall Stratton F D 1

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND90ND
2015N/A00N/A
2016N/A00N/A
2017ND30ND
2018N/A00N/A
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
2014-02-251402-03383-001ND
2014-02-251402-03383-002ND
2014-02-251402-03383-003ND
2014-06-243052158ND
2014-06-243052344ND
2014-06-243052183ND
2014-12-113154186ND
2014-12-113154137ND
2014-12-113154246ND
2017-01-311702-02159-001ND
2017-01-311702-02159-002ND
2017-01-311702-02159-003ND