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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

City of Post Falls

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND60ND
2014ND60ND
2015N/A00N/A
2016N/A00N/A
2017N/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
2013-11-14131118001-004ND
2013-11-14131118001-012ND
2013-11-14131118001-003ND
2013-11-14131118001-001ND
2013-11-14131118001-002ND
2013-11-14131118001-011ND
2014-05-12140513061-002ND
2014-05-12140513061-003ND
2014-05-12140513061-006ND
2014-05-12140513061-005ND
2014-05-13140513061-001ND
2014-05-13140513061-004ND