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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 30, 2017.
measured in parts per billion
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00
North West - all times are in CST
6 28233118192324232518 FEW NA 6 1 R IDEM
13 30301621212216142021 FEW NA 13 1 R IDEM
16 36353432312928262323 FEW NA 16 1 R IDEM
28 36353333313028272424 FEW NA 28 1 R IDEM
31 29312729252629262222 FEW NA 31 1 R IDEM
34 34333231302825242220 FEW NA 34 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00
North Central - all times are in EST
5 SPN39383634312926252423 FEW 5 1 R IDEM
18 SPN37343229272624222021 FEW 18 1 R IDEM
21 SPN35343432312927262423 FEW 21 1 R IDEM
74 SPN42403834322927262525 FEW 74 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00
North East - all times are in EST
7 SPN35333330282525232018 FEW 7 1 R IDEM
19 SPN34343232312928262421 FEW 19 1 R IDEM
27 SPN35353331282624222018 FEW 27 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00
West Central - refer to the first data column for each site's specific time zone
EST9 CAL32343331292426333437 FEW 9 1 R IDEM
EST36 SPN31313029282827252231 FEW 36 1 R IDEM
EST37 SPN33363433272323303336 FEW 37 1 R IDEM
CST38 36363333272934363637 FEW NA 38 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00
East Central - all times are in EST
1 SPN24232222201817242534 FEW 1 1 R IDEM
25 SPN28252525232222242632 FEW 25 1 R IDEM
40 SPN30292927221815182526 FEW 40 1 R IDEM
42 2221212019181616222431 FEW 42 1 R IDEM
56 SPN22201920191418222130 FEW 56 1 R IDEM
60 SPN26222122201817222532 FEW 60 1 R IDEM
63 SPN20191715151314202630 FEW 63 1 R IDEM
64 SPN21202018151523252733 FEW 64 1 R IDEM
65 SPN SPN LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM 65 1 R IDEM
66 SPN1519171681213202732 FEW 66 1 R IDEM
68 SPN24242421181424272728 FEW 68 1 R IDEM
71 SPN27272318191816172329 FEW 71 1 R IDEM
76 SPN23191513152427262529 FEW 76 1 R IDEM
78 2022222017181717212532 FEW 78 1 R IDEM
80 SPN1715131181119222630 FEW 80 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00
South West - refer to the first data column for each site's specific time zone
CST12 38312933292633393942 FEW NA 12 1 R IDEM
CST15 38333029262529353540 FEW NA 15 1 R IDEM
CST20 32282124262423283135 FEW NA 20 1 R IDEM
CST33 37353027282729343837 FEW NA 33 1 R IDEM
CST49 29312726242424323533 FEW NA 49 1 R IDEM
CST52 36272731272333383740 FEW NA 52 1 R IDEM
EST67 SPN31312825242626293137 FEW 67 1 R IDEM
RegionCAMSMorningCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00
South East - all times are in EST
3 SPN54242318222726 FEW 3 1 R IDEM
4 SPN33323131282625242828 FEW 4 1 R IDEM
59 SPN22181614121515212331 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.