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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.

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Carbon Monoxide Hourly Averages for Monday, October 23, 2017.
measured in parts per million
RegionCAMSMorningAfternoonCAMSPOCEntity
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
North West - all times are in CST
11 0.3230.1190.1070.1100.1330.1660.2301.0290.2860.1840.1640.1430.1500.2480.3230.284 NA NA 11 1 R IDEM
RegionCAMSMorningAfternoonCAMSPOCEntity
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
East Central - all times are in EST
42 0.1910.1890.1920.2030.2110.2210.2330.250 SPN SPN CAL CAL CAL CAL CAL CAL CAL NA 42 1 R IDEM
58 0.6830.6210.5640.5270.4760.4790.6150.7690.8680.9170.9061.1281.3371.0711.2461.3681.262 NA 58 1 R IDEM
78 0.2440.2470.2410.2600.2550.2770.3050.3060.2980.2920.2880.3090.2850.2930.3720.4520.364 NA 78 1 R IDEM
RegionCAMSMorningAfternoonCAMSPOCEntity
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
South West - all times are in CST
46 0.2380.2320.1840.1860.2260.2310.2720.5100.2550.2500.2280.2260.2190.2500.2940.393 NA NA 46 1 R IDEM
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 IDEM 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 IDEM 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.