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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Las Vegas Valley Water 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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND40ND
2014ND80ND
2015N/A00N/A
2016ND10ND
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

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
2013-03-06201303080526AMND
2013-06-05201306070101AMND
2013-09-16201309190437AMND
2013-12-18201312200210AMND
2014-01-08201401100299AMND
2014-03-18201403200555AMND
2014-04-23201404250233AMND
2014-04-23201404250231AMND
2014-06-16201406180435AMND
2014-09-29201410010215AMND
2014-10-22201410240231AMND
2014-10-22201410240229AMND
2016-06-20N020115-001ND