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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

San Fernando Water Department

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

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND130ND
2015ND50ND
2016ND30ND
2017ND50ND
2018ND40ND
2019ND20ND

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
2014-01-229590-003-0950ND
2014-01-229590-002-0905ND
2014-01-229590-004-0840ND
2014-04-10201404110048AMND
2014-04-10201404110046AMND
2014-04-10201404110047AMND
2014-04-10201404110049AMND
2014-07-08201407080439AMND
2014-07-08201407080437AMND
2014-10-23201410230582AMND
2014-10-23201410230584AMND
2014-10-23201410230580AMND
2014-10-23201410230586AMND
2015-01-07201501070348AMND
2015-01-07201501070346AMND
2015-01-219590-004-0905ND
2015-01-219590-003-1015ND
2015-01-219590-002-0820ND
2016-02-179590-002-0920ND
2016-02-179590-004-0900ND
2016-04-139590-004-0820ND
2017-01-259590-004-0800ND
2017-01-259590-003-0855ND
2017-01-259590-002-0715ND
2017-04-059590-004-0920ND
2017-10-249590-004-0715ND
2018-01-249590-004-1055ND
2018-01-249590-002-0900ND
2018-06-069590-004-0905ND
2018-07-119590-004-0855ND
2019-01-119590-004-0925ND
2019-01-119590-002-0900ND