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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Wayland 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.

MORE ABOUT THIS CONTAMINANT

 

59

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND190ND
2015ND80ND
2016ND80ND
2017ND80ND
2018ND80ND
2019ND80ND

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 Result
2014-01-28ND
2014-01-28ND
2014-01-28ND
2014-01-28ND
2014-01-28ND
2014-01-28ND
2014-04-01ND
2014-07-01ND
2014-07-01ND
2014-07-01ND
2014-07-01ND
2014-07-01ND
2014-08-20ND
2014-08-20ND
2014-08-20ND
2014-08-20ND
2014-08-27ND
2014-08-27ND
2014-10-07ND
2015-01-06ND
2015-04-14ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-10-06ND
2016-01-19ND
2016-04-05ND
2016-07-05ND
2016-07-05ND
2016-07-05ND
2016-07-05ND
2016-07-05ND
2016-10-04ND
2017-01-03ND
2017-04-04ND
2017-07-05ND
2017-07-05ND
2017-07-05ND
2017-07-05ND
2017-07-05ND
2017-10-03ND
2018-01-02ND
2018-04-03ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-10-02ND
2019-01-08ND
2019-04-09ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-10-07ND