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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Marshfield 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

 

45

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND30ND
2014ND90ND
2015ND90ND
2016ND60ND
2017ND60ND
2018ND60ND
2019ND60ND

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
2013-12-10762326-10420ND
2013-12-10762339-10420ND
2013-12-10762322-10420ND
2014-03-12774391ND
2014-03-12774394ND
2014-03-12774397ND
2014-04-08778731ND
2014-06-17797575-11618ND
2014-06-17797583-11618ND
2014-06-17797573-11618ND
2014-07-29806754ND
2014-10-28828091ND
2015-02-23844768ND
2015-02-23844770ND
2015-02-23844772ND
2015-04-14854033ND
2015-04-14854034ND
2015-09-02880610ND
2015-09-02880611ND
2015-10-14889076ND
2015-10-14889077ND
2016-02-01903586ND
2016-02-01903588ND
2016-02-01903590ND
2016-05-09920115ND
2016-08-09938049ND
2016-10-11952725ND
2017-01-31971704ND
2017-04-17983495ND
2017-04-17983491ND
2017-04-17983499ND
2017-08-071009142ND
2017-10-091023242ND
2018-01-301039074ND
2018-01-301039071ND
2018-01-301039076ND
2018-04-031048152ND
2018-07-161067477ND
2018-10-031085201ND
2019-02-131104975ND
2019-04-031113248ND
2019-04-031113252ND
2019-04-031113250ND
2019-07-091132876ND
2019-10-141154687ND