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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Valencia Heights Water Company

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2012-07-199588-012-0830ND
2012-07-199588-010-0815ND
2012-07-199588-005-0800ND
2013-07-099588-012-0755ND
2013-07-099588-010-0735ND
2013-07-099588-005-0745ND
2014-07-119588-012-1120ND
2014-07-119588-010-1105ND
2014-07-119588-005-1140ND
2015-07-169588-012-0730ND
2015-07-169588-010-0745ND
2016-04-069588-005-0810ND
2016-07-159588-012-0840ND
2016-07-159588-010-0830ND
2017-04-189588-005-0910ND
2017-07-129588-012-0840ND
2017-07-129588-010-0850ND