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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Dover Air Force Base

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND30ND
2016ND20ND
2017ND20ND
2018ND30ND
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
2014-12-31S553966ND
2014-12-31S553967ND
2015-01-21S588732ND
2015-10-19S614737ND
2015-10-19S614738ND
2016-08-16S670439ND
2016-08-16S670440ND
2017-08-31S737028ND
2017-08-31S737030ND
2018-01-17S770546ND
2018-08-16S812165ND
2018-08-17S812163ND
2019-08-08S865165ND
2019-08-08S865169ND