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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Franklin Water Systems 3

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013N/A00N/A
2014ND20ND
2015ND30ND
2016ND50ND
2017ND90ND

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
2012-09-27AC02270ND
2012-09-27AC02272ND
2014-06-24Q1423214004ND
2014-06-24Q1423214002ND
2015-06-23Q1523311006ND
2015-06-23Q1523311004ND
2015-06-23Q1523311002ND
2016-03-08Q1609693005ND
2016-03-08Q1609693004ND
2016-03-08Q1609693001ND
2016-12-13Q1654192014ND
2016-12-13Q1654192012ND
2017-03-21Q1711955005ND
2017-03-21Q1711955004ND
2017-03-21Q1711955002ND
2017-03-21Q1711955012ND
2017-03-21Q1711955011ND
2017-06-07AD86938ND
2017-06-21Q1725672001ND
2017-07-25Q1730588010ND
2017-07-25Q1730588005ND