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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

City of Granbury

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

 

94

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.0200 ppb101ND - 0.200 ppb
20140.0235 ppb171ND - 0.400 ppb
2015ND100ND
2016ND80ND
2017ND240ND
2018ND110ND
2019ND140ND

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
2013-12-182948860ND
2013-12-182948899ND
2013-12-182948880ND
2013-12-182948889ND
2013-12-182948917ND
2013-12-182948871ND
2013-12-182948830ND
2013-12-182948907ND
2013-12-192949465ND
2013-12-1929501390.200 ppb
2014-03-192994566ND
2014-06-173047360ND
2014-06-173047543ND
2014-06-173047598ND
2014-06-173047589ND
2014-06-173047431ND
2014-06-173047265ND
2014-06-263053892ND
2014-06-2630538300.400 ppb
2014-06-263054005ND
2014-06-263053979ND
2014-07-09Q1426808002ND
2014-07-09Q1426808068ND
2014-07-09Q1426808003ND
2014-07-09Q1426808005ND
2014-07-09Q1426808007ND
2014-09-173106660ND
2015-06-18Q1522966013ND
2015-06-18Q1522966011ND
2015-06-18Q1522966008ND
2015-06-18Q1522966007ND
2015-06-18Q1522966005ND
2015-06-18Q1522966002ND
2015-08-06Q1530880006ND
2015-11-16Q1544973005ND
2015-11-16Q1544973002ND
2015-11-16Q1544973003ND
2016-01-14Q1601671037ND
2016-01-14Q1601671034ND
2016-01-14Q1601671032ND
2016-01-14Q1601671030ND
2016-01-14Q1601671028ND
2016-05-31Q1621308009ND
2016-07-28Q1630948002ND
2016-11-30Q1652000005ND
2017-04-17Q1715565015ND
2017-04-17Q1715565012ND
2017-04-17Q1715565011ND
2017-04-17Q1715565008ND
2017-04-17Q1715565006ND
2017-07-06Q1727515021ND
2017-07-06Q1727515041ND
2017-07-06Q1727515018ND
2017-07-06Q1727515051ND
2017-07-06Q1727515023ND
2017-07-06Q1727515016ND
2017-09-19Q1744801008ND
2017-09-19Q1744801004ND
2017-09-19Q1744801006ND
2017-09-19Q1744801010ND
2017-09-19Q1744801013ND
2017-10-03Q1748324021ND
2017-10-03Q1748324019ND
2017-10-03Q1748324017ND
2017-10-03Q1748324015ND
2017-10-03Q1748324013ND
2017-10-04Q1748839036ND
2017-10-04Q1748839034ND
2017-10-04Q1748839042ND
2018-01-22Q1802342003ND
2018-01-22Q1802342002ND
2018-05-02Q1817630014ND
2018-05-02Q1817630013ND
2018-05-02Q1817630017ND
2018-09-26Q1838636005ND
2018-09-26Q1838636002ND
2018-12-10Q1850473003ND
2018-12-10Q1850473009ND
2018-12-10Q1850473007ND
2018-12-10Q1850473005ND
2019-03-18Q1911097014ND
2019-03-18Q1911097005ND
2019-03-18Q1911097007ND
2019-03-18Q1911097009ND
2019-03-18Q1911097011ND
2019-03-18Q1911097016ND
2019-05-09Q1923093012ND
2019-05-09Q1923093006ND
2019-05-09Q1923093005ND
2019-05-09Q1923093002ND
2019-05-09Q1923093016ND
2019-05-09Q1923093014ND
2019-09-04Q1962164002ND
2019-09-04Q1962164008ND