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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Mount Morris, City of

NOTE: Mount Morris, City of purchases water from Genesee County Water System which is required to test for chloromethane. Sample information shown below was taken by Genesee County Water System.

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND10ND
2014ND40ND
2015N/A00N/A
2016N/A00N/A
2017N/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

NOTE: Mount Morris, City of purchases water from Genesee County Water System which is required to test for chloromethane. Sample information shown below was taken by Genesee County Water System.

Date Lab ID Result
2012-04-03LLE22297ND
2012-08-09LLE42014ND
2013-03-25LLE67455ND
2013-09-181049169003ND
2013-12-171064014003ND
2014-03-18LLF12194ND
2014-03-191077213003ND
2014-06-112012000003ND
2014-10-022032501003ND