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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Lamont Public Utility District

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

 

35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND140ND
2016ND10ND
2017ND80ND
2018ND10ND
2019ND30ND

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
2014-07-155806-026-0630ND
2014-07-165806-024-0740ND
2014-07-165806-022-0900ND
2014-07-165806-010-1050ND
2014-07-165806-009-0800ND
2014-07-165806-007-0920ND
2014-07-165806-006-0830ND
2014-07-175806-005-1435ND
2015-06-22201506230783AMND
2015-06-22201506230847AMND
2015-06-22201506230843AMND
2015-06-22201506230377AMND
2015-06-22201506230889AMND
2015-06-22201506230410AMND
2015-06-22201506230346AMND
2015-07-10201506080004AMND
2015-07-10201506080007AMND
2015-07-10201506080008AMND
2015-07-10201506080005AMND
2015-07-10201506080001AMND
2015-07-10201506080006AMND
2015-07-10201506080003AMND
2016-02-125806-026-0830ND
2017-05-025806-026-1110ND
2017-09-195806-005-1220ND
2017-09-195806-006-0945ND
2017-09-195806-007-1135ND
2017-09-195806-009-0915ND
2017-09-195806-010-1255ND
2017-09-195806-022-1110ND
2017-09-195806-024-0835ND
2018-03-195806-026-0855ND
2019-02-205806-026-1030ND
2019-05-075806-026-0000ND
2019-10-225806-026-1127ND