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Ozone Hourly Averages

Ozone is a form of oxygen with three atoms instead of the usual two atoms. It is a photochemical oxidant and, at ground level, is the main component of smog. Unlike other gaseous pollutants, ozone is not emitted directly into the atmosphere. Instead, it is created in the atmosphere by the action of sunlight on volatile organic compounds and nitrogen oxides.

In general, higher levels of ozone usually occur on sunny days with light winds, primarily from March through October. An ozone exceedance day is counted if the measured eight-hour average ozone concentration exceeds the standards.

Use the controls below to select a different date or parameter and to control cell highlighting based on measured Ozone levels. 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.
Select a date: Time Format: Select a Parameter:
   
Ozone Highlights:  Moderate   Unhealthy for Sensitives   Unhealthy   Very Unhealthy  
Highlight validated data (Validated data has been manually reviewed by a data validator)
Select a Region:

Ozone Hourly Averages for Saturday, March 28, 2015.
measured in parts per billion
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
6 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 6 1 R IDEM
13 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 13 1 R IDEM
16 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 16 1 R IDEM
28 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 28 1 R IDEM
31 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 31 1 R IDEM
34 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 34 1 R IDEM
48 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 48 1 N 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
North Central - all times are in EST
5 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 5 1 R IDEM
18 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 18 1 R IDEM
74 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 74 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
North East - all times are in EST
7 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 7 1 R IDEM
19 PM PM PM PM PM PM PM PM PM PM PM PM LOST LOST LOST NA NA NA 19 1 R IDEM
27 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 27 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
West Central - refer to the first data column for each site's specific time zone
EST9 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 9 1 R IDEM
EST36 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 36 1 R IDEM
EST37 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 37 1 R IDEM
CST38 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 38 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
1 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 1 1 R IDEM
25 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 25 1 R IDEM
40 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 40 1 R IDEM
42 40 39 38 34 30 27 23 25 31 33 37 39 40 41 42 44 FEW NA 42 1 R IDEM
56 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 56 1 R IDEM
60 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 60 1 R IDEM
61 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 61 1 R IDEM
63 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 63 1 R IDEM
65 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 65 1 R IDEM
66 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 66 1 R IDEM
68 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 68 1 R IDEM
71 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 71 1 R IDEM
76 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 76 1 R IDEM
78 33 32 32 26 21 17 13 16 20 26 28 31 32 33 35 37 FEW NA 78 1 R IDEM
80 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA 80 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 - refer to the first data column for each site's specific time zone
CST12 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 12 1 R IDEM
CST15 20 15 15 27 27 24 28 33 31 34 36 38 40 43 43 FEW NA NA 15 1 R IDEM
CST20 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 20 1 R IDEM
CST24 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 24 1 R IDEM
CST33 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 33 1 R IDEM
CST49 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 49 1 R IDEM
CST52 PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM PM NA NA 52 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 East - all times are in EST
3 35 SPZ 32 31 31 31 29 31 32 31 33 36 37 40 42 42 FEW NA 3 1 R IDEM
4 35 32 33 34 34 32 30 31 34 35 38 39 39 42 43 44 FEW NA 4 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.
 N - Data from this instrument does not meet EPA quality assurance criteria and cannot be used 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.