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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Kalaheo-Koloa

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND90ND
2014ND100ND
2015ND10ND
2016N/A00N/A
2017N/A00N/A
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
2013-11-14201311200635AMND
2013-11-14201311200587AMND
2013-11-14201311200584AMND
2013-11-15201311200637AMND
2013-11-15201311200529AMND
2013-11-15201311200549AMND
2013-11-15201311200546AMND
2013-11-15201311200639AMND
2013-11-19201311200536AMND
2014-05-14201405160430AMND
2014-05-14201405160436AMND
2014-05-14201405160432AMND
2014-05-14201405160301AMND
2014-05-14201405160428AMND
2014-05-19201405210832AMND
2014-05-19201405210824AMND
2014-05-19201405210798AMND
2014-05-19201405210830AMND
2014-08-13201408150392AMND
2015-08-06201508070222AMND