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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

City of San Benito

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND80ND
2014ND30ND
2015ND10ND
2016ND10ND
2017ND10ND

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
2012-07-181207811004ND
2012-07-181207811002ND
2013-05-063E08037-04AND
2013-05-063E08037-02AND
2013-07-09AC24144ND
2013-07-09AC24150ND
2013-08-193H21033-07AND
2013-08-193H21033-03AND
2013-11-183K19024-07AND
2013-11-183K19024-03AND
2014-04-144D15010-01AND
2014-04-144D15010-03AND
2014-09-25AC68254ND
2015-09-23AD08293ND
2016-07-29AD46453ND
2017-08-02AD91831ND