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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Wailuku

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

 

61

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND320ND
2015ND110ND
2016ND70ND
2017ND110ND
2018N/A00N/A
2019N/A00N/A

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
2014-05-20201405220554AMND
2014-05-20201405220487AMND
2014-05-20201405220557AMND
2014-05-20201405220596AMND
2014-05-20201405220560AMND
2014-05-20201405220511AMND
2014-05-20201405220514AMND
2014-05-20201405220552AMND
2014-05-20201405220517AMND
2014-05-21201405230211AMND
2014-08-18201408200629AMND
2014-08-18201408200308AMND
2014-08-18201408200640AMND
2014-08-18201408200301AMND
2014-08-18201408200604AMND
2014-08-18201408200593AMND
2014-08-18201408200642AMND
2014-08-18201408200666AMND
2014-08-18201408210408AMND
2014-08-18201408200675AMND
2014-08-28201409030634AMND
2014-11-17201411190711AMND
2014-11-17201411190575AMND
2014-11-17201411190588AMND
2014-11-17201411190501AMND
2014-11-17201411190281AMND
2014-11-18201411200618AMND
2014-11-18201411200419AMND
2014-11-18201411200624AMND
2014-11-18201411200621AMND
2014-11-19201411210530AMND
2014-11-28201412020247AMND
2015-02-17201502191114AMND
2015-02-17201502191117AMND
2015-02-17201502191096AMND
2015-02-17201502191041AMND
2015-02-17201502191171AMND
2015-02-17201502191080AMND
2015-02-17201502191131AMND
2015-02-17201502191084AMND
2015-02-17201502191194AMND
2015-02-18201502210062AMND
2015-02-20201502230428AMND
2016-02-23ND
2016-02-26ND
2016-02-26ND
2016-02-26ND
2016-09-12ND
2016-11-30ND
2016-11-30ND
2017-01-31ND
2017-01-31ND
2017-01-31ND
2017-02-24ND
2017-02-24ND
2017-02-27ND
2017-02-27ND
2017-02-27ND
2017-05-19ND
2017-05-19ND
2017-09-21ND