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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Sun Prairie Utilities

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

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND60ND
2014ND130ND
2015ND100ND
2016ND40ND
2017ND80ND
2018ND40ND
2019ND30ND

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
2013-10-31756110-10163ND
2013-11-07757664-10250ND
2013-11-07757678-10250ND
2013-11-07757676-10250ND
2013-11-07757692-10250ND
2013-11-07757662-10243ND
2014-03-18775328ND
2014-03-18775330ND
2014-03-18775285ND
2014-03-18775336ND
2014-05-06784515ND
2014-05-06784514ND
2014-05-06784518ND
2014-05-06784519ND
2014-05-06784516ND
2014-08-19811530ND
2014-08-19811529ND
2014-10-15825805ND
2014-10-15825807ND
2015-03-04846354ND
2015-03-04846348ND
2015-03-04846346ND
2015-03-04846352ND
2015-03-04846356ND
2015-03-04846344ND
2015-03-04846350ND
2015-04-28856747ND
2015-09-09881828ND
2015-10-20890964ND
2016-05-18922016ND
2016-05-18922018ND
2016-08-09938123ND
2016-10-11952740ND
2017-02-07972682ND
2017-04-26985418ND
2017-04-26985409ND
2017-04-26985413ND
2017-04-26985429ND
2017-04-26985422ND
2017-07-111003142ND
2017-10-241026061ND
2018-01-291038884ND
2018-04-241051659ND
2018-04-241051655ND
2018-08-291077039ND
2019-07-231136249ND
2019-07-231136252ND
2019-12-041163398ND