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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Chesterfield County Central Water System

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

 

36

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND130ND
2015ND70ND
2016ND40ND
2017ND40ND
2018ND40ND
2019ND40ND

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
2014-04-02201404030303AMND
2014-04-02201404030301AMND
2014-04-02201404030305AMND
2014-04-22E140308595ND
2014-04-22E140308573ND
2014-04-22E140308605ND
2014-04-22E140308606ND
2014-07-15201407160490AMND
2014-07-15201407160488AMND
2014-07-15201407160492AMND
2014-10-21201410220458AMND
2014-10-21201410220462AMND
2014-10-21201410220460AMND
2015-01-13201501140531AMND
2015-01-13201501140529AMND
2015-01-13201501140533AMND
2015-04-23VA010-DCLSND
2015-04-23VA010-DCLSND
2015-04-23VA010-DCLSND
2015-04-23VA010-DCLSND
2016-04-25E160305675ND
2016-04-25E160305671ND
2016-04-25E160305672ND
2016-04-25E160305682ND
2017-04-19E170304726ND
2017-04-19E170304741ND
2017-04-19E170304724ND
2017-04-20E170304722ND
2018-06-13E180403018ND
2018-06-13E180403021ND
2018-06-13E180403026ND
2018-06-13E180403037ND
2019-05-16E190402846ND
2019-05-16E190402839ND
2019-05-16E190402834ND
2019-05-16E190402830ND