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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Jamestown BPU

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
2013ND40ND
2014N/A00N/A
2015ND20ND
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
2013-02-211014117001ND
2013-02-211014118001ND
2013-08-081042087001ND
2013-08-081042085003ND
2015-02-262015 POC CLAY POND
2015-02-262015POC CASSADAGND
2016-05-04POCS 2016 CLAYPOND
2016-05-04POC16 CASSADAGAND
2017-08-23POC17 CASSADAGAND
2017-08-23POCS17 CLAY PONDND
2018-08-08POCS 18 JTOWN CLND
2018-08-08POCS 18 JTOWN CAND
2019-08-07POCS 19 JTOWN CAND
2019-08-07POCS 19 JTOWN CLND