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EWG's Tap Water Database

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Chloromethane

City of Flint

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
2013ND20ND
2014ND50ND
2015N/A00N/A

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
2010-11-05LLD59541ND
2011-12-02LLE11088ND
2012-05-03LLE26411ND
2013-01-18LLE61821ND
2013-07-18LLE83917ND
2014-01-232962387ND
2014-04-233014314ND
2014-05-22LLF19430ND
2014-08-06LLF31222ND
2014-10-28LLF44687ND