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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Bethany Crest LLC

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016ND30ND
2017N/A00N/A
2018ND10ND
2019ND40ND

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
2016-04-19S676588ND
2016-07-20S670336ND
2016-12-29S693905ND
2018-09-24S676741ND
2019-01-17S860848ND
2019-02-15S866436ND
2019-04-12S872262ND
2019-08-12S848324ND