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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Shawano Co. Utility

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND40ND
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND

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
2012-11-06692768ND
2013-03-19710364ND
2013-05-21720578ND
2013-08-06735643ND
2013-10-22754118ND
2014-03-19775750ND
2014-04-15780543ND
2014-08-19811520ND
2014-11-18832018ND
2015-03-17848835ND
2015-06-15865705ND
2015-09-08881303ND
2015-11-17894386ND
2016-02-16905511ND
2016-04-18916035ND
2016-08-09938143ND
2016-10-25955476ND
2017-03-06976137ND
2017-05-30994131ND
2017-09-111017363ND
2017-10-231025634ND