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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 Sunday, April 22, 2018.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00
North West - all times are in CST
6 LIM LIM LIM LIM LIM LIM LIM NA 6 1 R IDEM
13 352518112833 FEW NA 13 1 R IDEM
16 242730313337 FEW NA 16 1 R IDEM
28 333533363937 FEW NA 28 1 R IDEM
31 484742283329 FEW NA 31 1 R IDEM
34 142434333036 FEW NA 34 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00
North Central - all times are in EST
5 SPN201821252027 FEW 5 1 R IDEM
18 SPN121717101414 FEW 18 1 R IDEM
21 SPN303237363541 FEW 21 1 R IDEM
74 SPN363031343235 FEW 74 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00
North East - all times are in EST
7 SPN363839353637 FEW 7 1 R IDEM
19 SPN323835293238 FEW 19 1 R IDEM
27 SPN363135333837 FEW 27 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00
West Central - refer to the first data column for each site's specific time zone
EST9 SPN474339353636 FEW 9 1 R IDEM
EST36 SPN302930272933 FEW 36 1 R IDEM
EST37 SPN464138393839 FEW 37 1 R IDEM
CST38 383940393634 FEW NA 38 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00
East Central - all times are in EST
25 SPN404039363735 FEW 25 1 R IDEM
40 SPN312829312925 FEW 40 1 R IDEM
42 SPN373434343536 FEW 42 1 R IDEM
56 SPN424140373736 FEW 56 1 R IDEM
60 SPN393838383938 FEW 60 1 R IDEM
63 SPN403937353635 FEW 63 1 R IDEM
65 SPN383837353535 FEW 65 1 R IDEM
66 SPN383629363839 FEW 66 1 R IDEM
71 SPN353634323335 FEW 71 1 R IDEM
76 SPN373636373633 FEW 76 1 R IDEM
78 SPN323329252327 FEW 78 1 R IDEM
79 SPN343534353133 FEW 79 1 R IDEM
80 SPN413937322634 FEW 80 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00
South West - refer to the first data column for each site's specific time zone
CST12 484645434138 FEW NA 12 1 R IDEM
CST15 464644363437 FEW NA 15 1 R IDEM
CST24 474542403033 FEW NA 24 1 R IDEM
CST33 474541394239 FEW NA 33 1 R IDEM
CST49 464543424140 FEW NA 49 1 R IDEM
CST52 464340403527 FEW NA 52 1 R IDEM
EST67 SPN474645444140 FEW 67 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00
South East - all times are in EST
3 SPN413939383943 FEW 3 1 R IDEM
4 SPN464542414241 FEW 4 1 R IDEM
59 SPN393936363534 FEW 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.