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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 Monday, August 21, 2017.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid 1:00
North Central - all times are in EST
5 36 NA 5 1 R IDEM
18 25 NA 18 1 R IDEM
21 38 NA 21 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00
North East - all times are in EST
7 16 NA 7 1 R IDEM
19 LIM NA 19 1 R IDEM
27 10 NA 27 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00
West Central - refer to the first data column for each site's specific time zone
EST9 28 NA 9 1 R IDEM
EST36 30 NA 36 1 R IDEM
EST37 28 NA 37 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00
East Central - all times are in EST
1 25 NA 1 1 R IDEM
25 35 NA 25 1 R IDEM
40 25 NA 40 1 R IDEM
42 21 NA 42 1 R IDEM
56 28 NA 56 1 R IDEM
60 29 NA 60 1 R IDEM
63 38 NA 63 1 R IDEM
64 41 NA 64 1 R IDEM
65 28 NA 65 1 R IDEM
68 32 NA 68 1 R IDEM
71 20 NA 71 1 R IDEM
76 23 NA 76 1 R IDEM
78 22 NA 78 1 R IDEM
80 1 NA 80 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00
South West - refer to the first data column for each site's specific time zone
EST67 SPN NA 67 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00
South East - all times are in EST
3 12 NA 3 1 R IDEM
4 31 NA 4 1 R IDEM
59 SPZ 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.