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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Griffin

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
20130.0530 ppb101ND - 0.530 ppb
2014ND20ND
2015ND20ND
2016ND20ND
2017ND20ND

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
2012-05-22AH65147ND
2012-05-22AH65148ND
2013-03-212798074ND
2013-03-212798100ND
2013-05-21AI020420.530 ppb
2013-05-21AI02041ND
2013-06-272850027ND
2013-06-272850018ND
2013-09-252903572ND
2013-09-252903443ND
2013-12-172947525ND
2013-12-172947899ND
2014-05-01AI39358ND
2014-05-01AI39357ND
2015-03-25AI69693ND
2015-03-25AI69694ND
2016-04-05AJ09438ND
2016-04-05AJ09439ND
2017-06-12AJ57345ND
2017-06-12AJ57344ND