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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Niles

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

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND100ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND140ND
2019ND100ND

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
2014-04-083004006ND
2014-04-083004027ND
2014-04-083004039ND
2014-04-083004015ND
2014-08-05LLF31177ND
2014-08-05LLF31179ND
2014-10-073118106ND
2014-10-073118079ND
2014-10-073118094ND
2014-10-073118115ND
2018-03-05LLH68935ND
2018-03-05LLH68936ND
2018-06-25LLH88921ND
2018-06-25LLH88919ND
2018-06-25LLH88920ND
2018-08-06LLH97145ND
2018-08-06LLH97146ND
2018-08-06LLH97147ND
2018-09-13LLI05494ND
2018-09-17LLI06127ND
2018-09-17LLI06128ND
2018-09-17LLI06126ND
2018-11-27LLI16871ND
2018-11-27LLI16872ND
2019-02-11LLI25175ND
2019-02-11LLI25174ND
2019-02-11LLI25176ND
2019-06-19LLI44898ND
2019-06-19LLI44899ND
2019-09-17LLI64907ND
2019-09-17LLI64908ND
2019-09-17LLI64906ND
2019-12-10LLI82612ND
2019-12-10LLI82613ND