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EWG's Tap Water Database

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Chloromethane

Boone County PWSD 9

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011N/A00N/A
2012ND40ND
2013ND80ND
2014N/A00N/A
2015ND50ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 2.69 ppb

The 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
2012-02-07AB66761ND
2012-02-07AB66759ND
2012-02-08AB66758ND
2012-02-08AB66760ND
2013-03-183587172003AMND
2013-03-193587172007AMND
2013-03-193587172005AMND
2013-03-193587172001AMND
2013-10-0735111164007AMND
2013-10-0735111164005AMND
2013-10-0735111164003AMND
2013-10-0735111164001AMND
2015-02-18AC42741ND
2015-02-18AC42745ND
2015-02-18AC42744ND
2015-02-18AC42742ND
2015-02-18AC42743ND