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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Boone County Cons. PWSD1

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

 

36

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND100ND
2014N/A00N/A
2015ND130ND
2016N/A00N/A
2017N/A00N/A
2018ND130ND
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
2013-04-233590955005AMND
2013-04-233590955001AMND
2013-04-233590955003AMND
2013-04-233590955009AMND
2013-04-233590955007AMND
2013-10-2235113258003AMND
2013-10-2235113258005AMND
2013-10-2235113258001AMND
2013-10-2235113258009AMND
2013-10-2235113258007AMND
2015-02-19AC42732ND
2015-02-19AC42734ND
2015-02-19AC42730ND
2015-02-19AC42735ND
2015-02-19AC42733ND
2015-02-19AC42739ND
2015-02-19AC42738ND
2015-02-19AC42737ND
2015-02-19AC42736ND
2015-02-19AC42731ND
2015-02-19AC42729ND
2015-02-19AC42728ND
2015-02-19AC42727ND
2018-03-07AD15039ND
2018-03-07AD15037ND
2018-03-07AD15036ND
2018-03-07AD15035ND
2018-03-07AD15034ND
2018-03-07AD15038ND
2018-03-07AD15032ND
2018-03-07AD15031ND
2018-03-07AD15030ND
2018-03-07AD15029ND
2018-03-07AD15028ND
2018-03-07AD15027ND
2018-05-30AD26983ND