Carbon monoxide is a colorless, odorless, very toxic gas produced by the incomplete combustion of carbon-containing fuels, most notably by gasoline powered engines, power plants, and wood fires.
The eight-hour standard can be exceeded during winter months when very stable atmospheric conditions exist.
Use the controls below to select a different date or parameter. Click on the Generate Report button once you have made your selections.Click on the Plot Data button once the tabular report has been generated to open a separate window containing data plots.
PLEASE NOTE: This data has not been verified by the Clark County Department of Air Quality and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from Clark County Department of Air Quality ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.