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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Johnson Utilities

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
2012N/A00N/A
2013N/A00N/A
2014N/A00N/A
2015ND200ND
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

Date Lab ID Result
2015-01-193173509ND
2015-01-193173628ND
2015-01-193173559ND
2015-01-193173585ND
2015-01-193173545ND
2015-01-213175876ND
2015-01-273178375ND
2015-01-283179083ND
2015-03-173209611ND
2015-03-233212187ND
2015-07-143280681ND
2015-07-143279533ND
2015-07-143280734ND
2015-07-153281571ND
2015-07-153281601ND
2015-07-153281619ND
2015-07-213285514ND
2015-07-213285489ND
2015-07-213285586ND
2015-07-213285554ND