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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

City of Waco

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND150ND
2016ND30ND
2017ND40ND
2018ND20ND
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
2014-02-12AC42617ND
2014-08-04AC61951ND
2014-08-04AC61957ND
2014-08-04AC61953ND
2015-03-2635181337005AMND
2015-03-2635181337007AMND
2015-06-2535194687001AMND
2015-06-2535194689001AMND
2015-07-07AC98595ND
2015-07-07AC98597ND
2015-07-3035199996003AMND
2015-07-3035199996001AMND
2015-09-2835209341001AMND
2015-09-2835209341003AMND
2015-09-2835209341007AMND
2015-09-2835209341005AMND
2015-10-08AD10010ND
2015-12-2135222235003AMND
2015-12-2135222235001AMND
2016-07-11AD43619ND
2016-07-11AD43615ND
2016-07-11AD43617ND
2017-04-13AD79636ND
2017-07-27AD91148ND
2017-07-27AD91150ND
2017-10-02AD98801ND
2018-07-19AE33981ND
2018-07-19AE33959ND
2019-07-23AE75565ND
2019-07-23AE75567ND