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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Warrington Twp Water&sew Dept

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

 

38

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND170ND
20150.0321 ppb142ND - 0.250 ppb
2016ND40ND
2017ND30ND
2018N/A00N/A
2019N/A00N/A

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
2014-01-27L4861062-1ND
2014-01-27L4861067-1ND
2014-01-27L4861062-3ND
2014-01-27L4861062-4ND
2014-01-27L4861062-5ND
2014-03-13L4940517-1ND
2014-03-13L4940517-2ND
2014-06-12L5059467-1ND
2014-09-19L5205522-1ND
2014-11-11831008-12862ND
2014-11-11831002-12854ND
2014-11-11831014-12854ND
2014-11-11830998-12862ND
2014-11-11831006-12854ND
2014-11-11831016-12854ND
2014-11-11831004-12862ND
2014-11-11831012-12854ND
2015-01-2712274248ND
2015-01-2712274194ND
2015-01-2712274140ND
2015-01-2712274302ND
2015-01-2712274086ND
2015-02-09842481-13389ND
2015-05-11859192-14080ND
2015-05-11859202-14080ND
2015-05-11859198-14080ND
2015-05-11859200-14080ND
2015-05-11859204-140800.250 ppb
2015-05-11859208-14080ND
2015-05-11859194-14080ND
2015-08-2033055030.200 ppb
2016-02-0513857999ND
2016-02-0513857945ND
2016-02-0513857891ND
2016-02-0513857837ND
2017-01-1215502223ND
2017-01-1215502171ND
2017-01-1215502119ND