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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 Wednesday, February 20, 2019.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid
North Central - all times are in EST
5 FEW 5 1 R IDEM
18 FEW 18 1 R IDEM
21 FEW 21 1 R IDEM
74 FEW 74 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid
North East - all times are in EST
7 FEW 7 1 R IDEM
19 CAL 19 1 R IDEM
27 FEW 27 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid
West Central - refer to the first data column for each site's specific time zone
EST9 FEW 9 1 R IDEM
EST36 FEW 36 1 R IDEM
EST37 FEW 37 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid
East Central - all times are in EST
25 CAL 25 1 R IDEM
40 FEW 40 1 R IDEM
42 FEW 42 1 R IDEM
56 FEW 56 1 R IDEM
60 CAL 60 1 R IDEM
63 FEW 63 1 R IDEM
65 FEW 65 1 R IDEM
66 SPZ 66 1 R IDEM
68 FEW 68 1 R IDEM
71 FEW 71 1 R IDEM
76 FEW 76 1 R IDEM
78 FEW 78 1 R IDEM
79 FEW 79 1 R IDEM
80 FEW 80 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid
South West - refer to the first data column for each site's specific time zone
EST67 FEW 67 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid
South East - all times are in EST
3 FEW 3 1 R IDEM
4 FEW 4 1 R IDEM
59 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.