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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Kempner WSC

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
2012ND10ND
2013ND20ND
2014ND30ND
2015ND40ND
2016ND10ND
2017ND10ND

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
2012-08-07AB97394ND
2013-08-01Q1304801006ND
2013-12-11Q1316891001ND
2014-03-24Q1409297001ND
2014-08-05AC62131ND
2014-10-06Q1450882001ND
2015-03-30AC86583ND
2015-05-18AC92322ND
2015-08-20AD04880ND
2015-10-05AD09425ND
2016-01-14AD18295ND
2017-01-30AD67541ND