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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Tract 349 Mutual Water Co.

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.

 

24

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
2014ND50ND
2015ND60ND
2016ND50ND
2017ND80ND

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
2014-02-069588-002-0916ND
2014-04-169588-002-1015ND
2014-07-319588-002-0915ND
2014-12-099588-003-0914ND
2014-12-129588-002-0938ND
2015-03-209588-002-0930ND
2015-04-249588-002-0940ND
2015-07-309588-002-1133ND
2015-09-259588-002-0905ND
2015-10-239588-002-0932ND
2015-10-269588-003-0929ND
2016-01-299588-003-0900ND
2016-03-299588-002-0926ND
2016-05-279588-002-0915ND
2016-07-229588-002-0939ND
2016-10-149588-002-0930ND
2017-01-279588-002-0920ND
2017-02-109588-002-0850ND
2017-02-249588-003-0910ND
2017-03-109588-002-0925ND
2017-04-219588-002-0907ND
2017-07-149588-002-0915ND
2017-10-279588-002-0950ND
2017-11-179588-002-1115ND