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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Glen of Robin Hood

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND100ND
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
2014-02-11AI27909ND
2014-02-11AI27910ND
2014-02-11AI27911ND
2014-02-11AI27912ND
2015-05-20113214PND
2015-05-20113215PND
2015-05-20113216PND
2015-05-20113217PND
2015-05-20113218PND
2015-11-18116039PND
2015-11-18116038PND
2015-11-18116037PND
2015-11-18116036PND
2015-11-18116035PND
2017-08-28AJ66184ND
2017-08-28AJ66183ND
2017-08-28AJ66182ND