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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Purdue University Water Works

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND60ND
2014ND120ND
2015N/A00N/A
2016N/A00N/A
2017ND60ND
2018N/A00N/A
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
2013-11-1335115836003AMND
2013-11-1335115836001AMND
2013-11-1335115836009AMND
2013-11-1335115836011AMND
2013-11-1335115836007AMND
2013-11-1335115836005AMND
2014-05-2835139772009AMND
2014-05-2835139772003AMND
2014-05-2835139772005AMND
2014-05-2835139772001AMND
2014-05-2835139772011AMND
2014-05-2835139772007AMND
2014-06-03507778RV-1402ND
2014-06-03507783RV-1402ND
2014-06-03507782RV-1402ND
2014-06-03507781RV-1402ND
2014-06-03507780RV-1402ND
2014-06-03507779RV-1402ND
2017-10-25648669ND
2017-10-25618668ND
2017-10-25618667ND
2017-10-26618892ND
2017-10-26618891ND
2017-12-07622466RV-1704ND