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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Bellingham Dpw Water Sewer Div.

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

 

62

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.0433 ppb61ND - 0.260 ppb
2014ND170ND
2015ND120ND
2016N/A00N/A
2017ND110ND
2018ND50ND
2019ND110ND

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
2013-10-09ND
2013-10-09ND
2013-10-09ND
2013-10-21ND
2013-10-210.260 ppb
2013-10-21ND
2014-04-15ND
2014-04-15ND
2014-04-15ND
2014-04-15ND
2014-04-23ND
2014-05-19ND
2014-05-19ND
2014-05-19ND
2014-05-19ND
2014-05-19ND
2014-05-19ND
2014-05-21ND
2014-05-21ND
2014-06-16ND
2014-06-16ND
2014-06-16ND
2014-06-16ND
2015-06-15ND
2015-06-15ND
2015-06-15ND
2015-06-15ND
2015-06-15ND
2015-06-15ND
2015-06-15ND
2015-06-15ND
2015-06-15ND
2015-06-29ND
2015-06-29ND
2015-06-29ND
2017-05-15ND
2017-05-15ND
2017-05-15ND
2017-05-15ND
2017-05-15ND
2017-05-15ND
2017-05-15ND
2017-05-15ND
2017-05-15ND
2017-05-15ND
2017-09-18ND
2018-05-31ND
2018-05-31ND
2018-09-17ND
2018-12-17ND
2018-12-17ND
2019-03-11ND
2019-04-26ND
2019-04-26ND
2019-04-26ND
2019-04-26ND
2019-04-26ND
2019-04-26ND
2019-04-26ND
2019-04-26ND
2019-04-26ND
2019-04-26ND