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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

City of Seal Beach

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND90ND
2014ND40ND
2015ND20ND
2016ND20ND
2017ND20ND

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
2012-01-244417-001-0820ND
2012-01-244417-002-0800ND
2012-02-144417-009-0800ND
2012-05-094417-003-0740ND
2013-02-064417-002-0825ND
2013-02-074417-009-1410ND
2013-02-274417-001-0835ND
2013-06-103010041805-2ND
2013-08-073010041806-2ND
2013-08-073010041804-2ND
2013-09-033010041805-3ND
2013-10-304417-003-0800ND
2013-12-034417-003-0810ND
2014-01-304417-009-0955ND
2014-01-304417-001-0930ND
2014-01-304417-002-0900ND
2014-02-254417-003-0740ND
2015-01-204417-002-0830ND
2015-01-204417-009-0805ND
2016-01-274417-002-0930ND
2016-01-274417-009-0910ND
2017-01-124417-009-0835ND
2017-01-124417-002-0815ND