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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Silverdale Water District 16

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.

MORE ABOUT THIS CONTAMINANT

 

35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND110ND
2015ND220ND
2016ND10ND
2017N/A00N/A
2018ND10ND
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
2014-12-08201412090508AMND
2014-12-08201412090590AMND
2014-12-08201412090767AMND
2014-12-08201412090583AMND
2014-12-08201412090603AMND
2014-12-08201412090605AMND
2014-12-09201412100442AMND
2014-12-09201412100830AMND
2014-12-09201412100776AMND
2014-12-10201412110237AMND
2014-12-10201412110884AMND
2015-06-16201506170403AMND
2015-06-16201506170384AMND
2015-06-16201506170589AMND
2015-06-16201506170375AMND
2015-06-16201506170352AMND
2015-06-17201506180429AMND
2015-06-17201506180501AMND
2015-06-17201506180469AMND
2015-06-17201506180486AMND
2015-06-17201506180490AMND
2015-06-17201506190057AMND
2015-08-2039383ND
2015-08-2039378ND
2015-08-2039379ND
2015-08-2039380ND
2015-08-2039381ND
2015-08-2039382ND
2015-08-2140221ND
2015-08-2140222ND
2015-08-2140223ND
2015-08-2140224ND
2015-08-2140225ND
2016-01-25ND
2018-09-04ND