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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Hilo

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
2012N/A00N/A
2013ND40ND
2014ND40ND
2015N/A00N/A
2016N/A00N/A
2017ND20ND

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
2013-09-23201309250031AMND
2013-09-23201309250033AMND
2013-09-23201309250037AMND
2013-09-23201309250035AMND
2014-03-24201403260456AMND
2014-03-24201403260442AMND
2014-03-24201403260446AMND
2014-03-24201403260462AMND
2017-05-09ND
2017-08-16ND