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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Lacey 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

 

43

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND130ND
2015ND190ND
2016ND80ND
2017N/A00N/A
2018ND10ND
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
2014-12-02201412040301AMND
2014-12-02201412040492AMND
2014-12-02201412040255AMND
2014-12-02201412040482AMND
2014-12-03201412050406AMND
2014-12-03201412040287AMND
2014-12-03201412040345AMND
2014-12-03201412050528AMND
2014-12-03201412050482AMND
2014-12-03201412040484AMND
2014-12-04201412040579AMND
2014-12-04201412050498AMND
2014-12-04201412050473AMND
2015-02-2615436ND
2015-06-29201506300327AMND
2015-06-29201506300268AMND
2015-06-29201506300521AMND
2015-06-29201506300307AMND
2015-06-29201506300274AMND
2015-06-29201506300314AMND
2015-06-29201506300498AMND
2015-06-30201507010636AMND
2015-06-30201507010336AMND
2015-06-30201507010550AMND
2015-06-30201507010518AMND
2015-06-30201507010547AMND
2015-06-30201507010523AMND
2015-09-1618580ND
2015-09-1618581ND
2015-09-1618582ND
2015-09-1618583ND
2015-09-1618584ND
2016-04-14ND
2016-09-15ND
2016-10-12ND
2016-10-12ND
2016-10-12ND
2016-10-13ND
2016-10-13ND
2016-10-13ND
2018-04-26ND
2019-06-20ND
2019-11-13ND