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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 Tuesday, September 30, 2014.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00
North West - all times are in CST
6 26 24 26 FEW NA NA 6 1 R IDEM
13 24 25 26 FEW NA NA 13 1 R IDEM
16 23 22 24 FEW NA NA 16 1 R IDEM
28 23 23 25 FEW NA NA 28 1 R IDEM
31 21 21 23 FEW NA NA 31 1 R IDEM
48 22 22 22 FEW NA NA 48 1 N IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00
North Central - all times are in EST
5 SPN 17 18 18 FEW NA 5 1 R IDEM
18 16 11 10 10 FEW NA 18 1 R IDEM
21 16 17 17 17 FEW NA 21 1 R IDEM
74 16 18 17 17 FEW NA 74 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00
North East - all times are in EST
7 28 34 29 21 FEW NA 7 1 R IDEM
19 36 33 30 22 FEW NA 19 1 R IDEM
27 22 21 21 17 FEW NA 27 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 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 4 1 0 3 FEW NA 9 1 R IDEM
EST36 25 27 24 19 FEW NA 36 1 R IDEM
EST37 5 3 1 7 FEW NA 37 1 R IDEM
CST38 6 6 5 FEW NA NA 38 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00
East Central - all times are in EST
1 0 4 21 38 FEW NA 1 1 R IDEM
40 10 9 14 11 FEW NA 40 1 R IDEM
42 0 0 0 0 FEW NA 42 1 R IDEM
56 0 0 15 16 FEW NA 56 1 R IDEM
60 1 0 0 0 FEW NA 60 1 R IDEM
61 12 9 3 1 FEW NA 61 1 R IDEM
63 9 8 5 5 FEW NA 63 1 R IDEM
64 25 23 22 25 FEW NA 64 1 R IDEM
65 27 40 27 18 FEW NA 65 1 R IDEM
66 0 7 8 18 FEW NA 66 1 R IDEM
71 1 5 13 20 FEW NA 71 1 R IDEM
76 13 15 11 11 FEW NA 76 1 R IDEM
78 -9 -5 35 12 FEW NA 78 1 R IDEM
80 0 0 0 0 FEW NA 80 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 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 4 3 1 FEW NA NA 12 1 R IDEM
CST15 8 1 1 FEW NA NA 15 1 R IDEM
CST20 1 1 1 FEW NA NA 20 1 R IDEM
CST24 20 25 28 FEW NA NA 24 1 R IDEM
CST33 15 8 9 FEW NA NA 33 1 R IDEM
CST49 30 26 27 FEW NA NA 49 1 R IDEM
CST52 6 5 6 FEW NA NA 52 1 R IDEM
EST67 8 4 3 3 FEW NA 67 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00
South East - all times are in EST
3 5 5 8 6 FEW NA 3 1 R IDEM
4 12 8 13 9 FEW NA 4 1 R IDEM
59 8 5 4 3 FEW NA 59 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.