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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Haralson County Water Auth.

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND80ND
2016ND20ND
2017ND20ND
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
2014-04-01AI36906ND
2014-04-01AI36905ND
2015-02-113186523ND
2015-02-113186655ND
2015-03-03AI65933ND
2015-03-03AI65932ND
2015-05-203247209ND
2015-08-123299283ND
2015-08-123300066ND
2015-11-233364197ND
2016-03-15AJ08224ND
2016-03-15AJ08223ND
2017-06-05AJ56554ND
2017-06-05AJ56553ND
2018-03-28AJ86574ND
2018-03-28AJ86573ND
2019-04-24AK15740ND
2019-04-24AK15739ND