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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, April 4, 2020.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
North West - refer to the first data column for each site's specific time zone
CST6 1265 FEW NA 6 1 R IDEM
EST13 4337129 FEW 13 1 R IDEM
CST16 413823 FEW NA 16 1 R IDEM
CST28 LIM LIM LIM LIM NA 28 1 R IDEM
CST31 2484 FEW NA 31 1 R IDEM
CST34 323433 FEW NA 34 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
North Central - all times are in EST
5 FEW FEW FEW FEW FEW 5 1 R IDEM
18 13343229 FEW 18 1 R IDEM
21 44444443 FEW 21 1 R IDEM
74 28263133 FEW 74 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
North East - all times are in EST
7 23252827 FEW 7 1 R IDEM
19 28313029 FEW 19 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
West Central - refer to the first data column for each site's specific time zone
EST9 33116 FEW 9 1 R IDEM
EST36 26242325 FEW 36 1 R IDEM
EST37 239147 FEW 37 1 R IDEM
CST38 23116 FEW NA 38 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
East Central - all times are in EST
25 30262833 FEW 25 1 R IDEM
40 10151714 FEW 40 1 R IDEM
42 521113 FEW 42 1 R IDEM
56 34323833 FEW 56 1 R IDEM
60 30252734 FEW 60 1 R IDEM
65 39353026 FEW 65 1 R IDEM
66 27242728 FEW 66 1 R IDEM
68 30272428 FEW 68 1 R IDEM
71 25242219 FEW 71 1 R IDEM
76 32242022 FEW 76 1 R IDEM
78 24161528 FEW 78 1 R IDEM
79 23242324 FEW 79 1 R IDEM
80 10777 FEW 80 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
South West - refer to the first data column for each site's specific time zone
CST12 201815 FEW NA 12 1 R IDEM
CST15 241728 FEW NA 15 1 R IDEM
CST24 353631 FEW NA 24 1 R IDEM
CST33 343435 FEW NA 33 1 R IDEM
CST49 484142 FEW NA 49 1 R IDEM
CST52 191514 FEW NA 52 1 R IDEM
EST67 26292118 FEW 67 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00
South East - all times are in EST
3 10897 FEW 3 1 R IDEM
4 29282513 FEW 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.

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.