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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  
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Ozone Hourly Averages for Tuesday, June 28, 2016.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
North West - all times are in CST
6 37 29 18 17 18 NA NA 6 1 R IDEM
13 36 31 20 20 19 NA NA 13 1 R IDEM
28 31 28 23 19 18 NA NA 28 1 R IDEM
31 35 30 20 18 19 NA NA 31 1 R IDEM
34 24 23 17 15 16 NA NA 34 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
North Central - all times are in EST
5 SPZ SPZ LIM LIM LIM LIM NA 5 1 R IDEM
18 28 26 24 21 16 12 NA 18 1 R IDEM
21 17 12 11 10 12 11 NA 21 1 R IDEM
74 26 24 22 18 FEW NA NA 74 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
North East - all times are in EST
7 37 34 31 27 23 21 NA 7 1 R IDEM
19 28 27 25 22 19 16 NA 19 1 R IDEM
27 26 29 25 22 18 16 NA 27 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
West Central - refer to the first data column for each site's specific time zone
EST9 35 29 27 24 17 16 NA 9 1 R IDEM
EST36 30 25 21 17 16 17 NA 36 1 R IDEM
EST37 27 22 20 14 9 8 NA 37 1 R IDEM
CST38 SPZ 28 25 20 17 NA NA 38 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
East Central - all times are in EST
1 SPZ 26 30 32 25 13 NA 1 1 R IDEM
25 32 33 36 33 27 16 NA 25 1 R IDEM
40 42 35 29 26 23 18 NA 40 1 R IDEM
42 34 25 33 35 32 27 NA 42 1 R IDEM
56 LIM LIM LIM LIM LIM LIM NA 56 1 R IDEM
60 27 32 34 36 29 21 NA 60 1 R IDEM
63 27 25 22 27 27 15 NA 63 1 R IDEM
64 28 26 24 23 24 17 NA 64 1 R IDEM
65 31 29 28 26 22 20 NA 65 1 R IDEM
66 32 35 32 35 31 18 NA 66 1 R IDEM
68 29 25 22 25 19 16 NA 68 1 R IDEM
71 35 33 31 28 24 21 NA 71 1 R IDEM
76 SPZ SPZ LIM LIM LIM CAL NA 76 1 R IDEM
78 25 18 22 26 15 7 NA 78 1 R IDEM
80 2 2 0 0 0 0 NA 80 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
South West - refer to the first data column for each site's specific time zone
CST12 9 6 5 7 7 NA NA 12 1 R IDEM
CST15 9 11 22 25 20 NA NA 15 1 R IDEM
CST20 6 4 21 15 11 NA NA 20 1 R IDEM
CST24 38 39 37 29 18 NA NA 24 1 R IDEM
CST33 25 25 21 15 17 NA NA 33 1 R IDEM
CST49 26 25 23 20 16 NA NA 49 1 R IDEM
CST52 6 4 3 3 1 NA NA 52 1 R IDEM
EST67 13 7 7 2 4 22 NA 67 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00
South East - all times are in EST
3 SPN 28 26 22 20 20 NA 3 1 R IDEM
4 20 16 11 20 22 22 NA 4 1 R IDEM
59 SPZ 7 22 30 33 28 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.

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.