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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Cedar Rapids Water Department

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND100ND
2014ND20ND
2015ND20ND
2016ND20ND
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
2012-05-091902635ND
2012-05-091902637ND
2012-10-311943771ND
2012-10-311943769ND
2013-02-133B14016-01AMND
2013-02-133B14016-04AMND
2013-05-223E23046-01AND
2013-05-223E23046-02AND
2013-08-213H22042-03AND
2013-08-213H22042-01AND
2013-09-102005694ND
2013-09-102005696ND
2013-11-203K21099-01AND
2013-11-203K21099-03AND
2014-10-082085398ND
2014-10-082085401ND
2015-10-06OE302405ND
2015-10-06OE302401ND
2016-10-17OE441633ND
2016-10-17OE441634ND
2017-11-20OE592396ND
2017-11-20OE592397ND