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EWG's Tap Water Database

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Chloromethane

Hammond Water Works Department

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND10ND
2011ND10ND
2012ND10ND
2013ND10ND
2014ND10ND
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
2010-10-05252464RV-1004ND
2011-10-11270052RV1104ND
2012-10-09286986RV-1204ND
2013-10-08305039RV-1304ND
2014-10-08327188RV-1404ND
2015-03-243213269ND
2015-06-163263373ND
2015-09-153322772ND
2015-10-06350518RV-1504ND
2015-12-153374830ND