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Carbon Monoxide Hourly Averages

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.
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Carbon Monoxide Hourly Averages for Saturday, August 19, 2017.
measured in parts per million
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00
Clark County - all times are in PST
540  1 0.2610.2570.4020.5420.5540.6580.5950.4240.3500.2360.1840.1840.1760.1860.1830.1760.193 FEW NA 540  1 1 R DAQ
561  1 0.2390.5980.4840.4530.5200.5440.2860.2530.2360.1740.0840.0740.0840.0770.0790.0930.088 FEW NA 561  1 1 R DAQ
1501 0.4990.3450.2480.2860.2820.3480.3640.3330.5760.6370.6490.5940.5020.3890.4380.6600.712 FEW NA 1501 1 R DAQ
2002  1 0.3820.2380.1410.0710.0490.0910.0370.0190.0530.0230.0000.0000.0000.0000.0000.0000.000 FEW NA 2002  1 1 R DAQ
- These sites are maintained and operated by Clark County Department of Air Quality.

DAQ does not certify the validity or quality of data it hosts from other monitoring entities.
Maximum values for the day are bold within the table. Minimum values are bold italic.
 R - Data from this instrument meets EPA quality assurance criteria for regulatory purposes.

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.