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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Fond Du Lac Waterworks

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

 

40

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND100ND
2015ND100ND
2016ND60ND
2017ND50ND
2018ND70ND
2019ND20ND

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
2014-02-18771007ND
2014-02-18771010ND
2014-04-14780745ND
2014-07-21804444ND
2014-09-23821514-12423ND
2014-09-23821518-12423ND
2014-09-23821516-12423ND
2014-09-23821507-12423ND
2014-10-14825636-12608ND
2014-10-29828515ND
2015-02-03841710ND
2015-02-03841707ND
2015-03-18849300-13670ND
2015-03-18849296-13670ND
2015-03-18849298-13670ND
2015-03-18849304-13670ND
2015-03-18849302-13670ND
2015-04-21855442ND
2015-07-20871829ND
2015-10-27891260ND
2016-01-22902600ND
2016-03-08908868ND
2016-03-08908871ND
2016-04-06914177ND
2016-09-26948632ND
2016-11-28961245ND
2017-02-14973636ND
2017-03-06976159ND
2017-04-24985200ND
2017-07-261006861ND
2017-10-091023185ND
2018-02-211042069ND
2018-02-211042067ND
2018-02-211042065ND
2018-04-111049881ND
2018-04-111049883ND
2018-08-151074181ND
2018-08-151074183ND
2019-03-061108265ND
2019-03-061108269ND