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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  
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Ozone Hourly Averages for Friday, October 19, 2018.
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 CAL1015181512141821 FEW NA NA 6 1 R IDEM
13 171918191918192025 FEW NA NA 13 1 R IDEM
16 232023262626242930 FEW NA NA 16 1 R IDEM
28 262425242221222528 FEW NA NA 28 1 R IDEM
31 131215161412172424 FEW NA NA 31 1 R IDEM
34 211919181616152123 FEW NA 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 24312728302929293033 FEW NA 5 1 R IDEM
18 25242426252323212528 FEW NA 18 1 R IDEM
21 29272526252527272830 FEW NA 21 1 R IDEM
74 17151418191513122029 FEW NA 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 1114121112108111622 FEW NA 7 1 R IDEM
19 35810107771324 FEW NA 19 1 R IDEM
27 171513121389141619 FEW NA 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 11111001315 FEW NA 9 1 R IDEM
EST36 19181820212020162527 FEW NA 36 1 R IDEM
EST37 634311391622 FEW NA 37 1 R IDEM
CST38 34211011013 FEW NA 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
25 12181818191718182329 FEW NA 25 1 R IDEM
40 86558139141826 FEW NA 40 1 R IDEM
42 SPZ SPZ LIM LIM LIM LIM LIM LIM LIM LIM LIM NA 42 1 R IDEM
56 00000113716 FEW NA 56 1 R IDEM
60 10000002813 FEW NA 60 1 R IDEM
63 108555813182729 FEW NA 63 1 R IDEM
65 212128292612481827 FEW NA 65 1 R IDEM
66 20256712919 FEW NA 66 1 R IDEM
68 9275595141827 FEW NA 68 1 R IDEM
71 00000001715 FEW NA 71 1 R IDEM
76 15141413656121626 FEW NA 76 1 R IDEM
78 11000001718 FEW NA 78 1 R IDEM
79 22222024252315141823 FEW NA 79 1 R IDEM
80 22111111320 FEW NA 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 CAL LIM LIM LIM LIM LIM LIM LIM LIM LIM NA NA 12 1 R IDEM
CST15 00000-10211 FEW NA NA 15 1 R IDEM
CST24 CAL LOST LOST LOST LOST LOST LOST LOST LOST NA NA NA 24 1 R IDEM
CST33 CAL533222620 FEW NA NA 33 1 R IDEM
CST49 1513981113142123 FEW NA NA 49 1 R IDEM
CST52 5331000819 FEW NA NA 52 1 R IDEM
EST67 866454441423 FEW NA 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 0000000015 FEW NA 3 1 R IDEM
4 100000031113 FEW NA 4 1 R IDEM
59 84434222512 FEW 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.