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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Alto

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND60ND
2016ND30ND
2017ND40ND
2018ND60ND
2019ND30ND

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
2014-03-20AI36503ND
2015-03-10AI68777ND
2015-03-10AI68776ND
2015-03-10AI68775ND
2015-03-10AI68774ND
2015-03-10AI68773ND
2015-03-10AI68772ND
2016-03-09AJ08001ND
2016-03-09AJ08000ND
2016-03-09AJ07999ND
2017-01-24AJ43416ND
2017-05-17AJ55685ND
2017-07-26AJ61793ND
2017-10-24AJ72298ND
2018-02-27AJ84670ND
2018-02-27AJ84669ND
2018-02-27AJ84668ND
2018-02-27AJ84667ND
2018-02-27AJ84666ND
2018-02-27AJ84665ND
2019-04-30AK16068ND
2019-04-30AK16070ND
2019-04-30AK16069ND