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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Farmington

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.

MORE ABOUT THIS CONTAMINANT

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND90ND
2014N/A00N/A
2015ND130ND
2016ND10ND
2017N/A00N/A
2018ND140ND
2019N/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
2013-07-103599940005AMND
2013-07-103599940009AMND
2013-07-103599940001AMND
2013-07-103599940007AMND
2013-09-1635108604005AMND
2013-09-1635108604001AMND
2013-09-1635108604003AMND
2013-09-1635108604009AMND
2013-09-1635108604007AMND
2015-07-21AC55400ND
2015-07-21AC55410ND
2015-07-21AC55406ND
2015-07-21AC55412ND
2015-07-21AC55404ND
2015-07-21AC55405ND
2015-07-21AC55407ND
2015-07-21AC55408ND
2015-07-21AC55409ND
2015-07-21AC55401ND
2015-07-21AC55402ND
2015-07-21AC55403ND
2015-07-21AC55411ND
2016-07-12AC80703ND
2018-07-23AD29578ND
2018-07-23AD29576ND
2018-07-23AD29573ND
2018-07-23AD29569ND
2018-07-23AD29565ND
2018-07-24AD29567ND
2018-07-24AD29575ND
2018-07-24AD29572ND
2018-07-24AD29570ND
2018-07-24AD29571ND
2018-07-24AD29574ND
2018-07-24AD29577ND
2018-07-24AD29566ND
2018-07-24AD29568ND