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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Waipahu-Ewa-Waianae

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

 

85

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND170ND
2014ND210ND
2015ND10ND
2016ND90ND
2017ND370ND
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
2013-07-01201307030716AMND
2013-07-01201307030663AMND
2013-07-01201307030661AMND
2013-07-01201307030714AMND
2013-07-01201307030687AMND
2013-07-01201307030712AMND
2013-07-01201307030685AMND
2013-07-05201307090226AMND
2013-07-05201307090222AMND
2013-07-05201307090228AMND
2013-07-08201307100916AMND
2013-07-08201307100912AMND
2013-07-08201307100910AMND
2013-07-08201307100908AMND
2013-07-08201307100914AMND
2013-07-09201307110695AMND
2013-07-09201307110697AMND
2014-01-03201401070165AMND
2014-01-04201401070157AMND
2014-01-05201401070162AMND
2014-01-06201401080575AMND
2014-01-06201401080569AMND
2014-01-06201401080573AMND
2014-01-06201401080571AMND
2014-01-07201401090460AMND
2014-01-07201401090458AMND
2014-01-08201401100234AMND
2014-01-08201401100236AMND
2014-01-10201401140234AMND
2014-01-10201401140236AMND
2014-01-10201401140240AMND
2014-01-11201401140238AMND
2014-01-12201401140232AMND
2014-01-13201401150384AMND
2014-01-14201401160432AMND
2014-06-04201406100325AMND
2014-06-16201406180445AMND
2014-07-15201407170579AMND
2015-01-13201501150509AMND
2016-01-14ND
2016-01-21ND
2016-01-25ND
2016-01-26ND
2016-04-12ND
2016-07-06ND
2016-10-12ND
2016-11-14ND
2016-12-14ND
2017-01-09ND
2017-01-10ND
2017-01-10ND
2017-01-10ND
2017-01-11ND
2017-01-24ND
2017-01-24ND
2017-01-25ND
2017-01-26ND
2017-02-02ND
2017-02-13ND
2017-02-13ND
2017-02-16ND
2017-02-22ND
2017-02-22ND
2017-02-23ND
2017-02-27ND
2017-03-13ND
2017-04-03ND
2017-04-25ND
2017-06-26ND
2017-07-20ND
2017-10-09ND
2017-10-11ND
2017-10-13ND
2017-10-16ND
2017-10-16ND
2017-10-16ND
2017-10-17ND
2017-10-18ND
2017-10-18ND
2017-10-23ND
2017-10-24ND
2017-10-24ND
2017-10-24ND
2017-10-25ND
2017-10-25ND