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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 Tuesday, August 30, 2016.
measured in parts per billion
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00
North West - all times are in CST
6 245000001410152330475254444739 FEW NA NA 6 1 R IDEM
13 02346824812202443546262636253 FEW NA NA 13 1 R IDEM
16 16191913211514121720212425324953524847 FEW NA NA 16 1 R IDEM
28 6481210899915212438465148473933 FEW NA NA 28 1 R IDEM
31 0002631 LOST LOST LOST LOST LOST LOST LOST LOST LOST LOST LOST LOST NA NA NA 31 1 R IDEM
34 109121481015131122282928354043483630 FEW NA NA 34 1 R IDEM
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00
North Central - all times are in EST
5 SPN17212121172828222626283539424643393631 FEW NA 5 1 R IDEM
18 2427252321191512193028253243464843433833 FEW NA 18 1 R IDEM
21 1126282725242022222322253136384144403327 FEW NA 21 1 R IDEM
74 414181617172621232830253241454742423426 FEW NA 74 1 R IDEM
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00
North East - all times are in EST
7 2019171411757243747515455564738313032 FEW NA 7 1 R IDEM
19 22121275108233645545557575344363230 FEW NA 19 1 R IDEM
27 232016126419192537424646413639293532 FEW NA 27 1 R IDEM
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00
West Central - refer to the first data column for each site's specific time zone
EST9 SPN2244103193445515857545454493540 FEW NA 9 1 R IDEM
EST36 SPZ1110689513222937374652534846433928 FEW NA 36 1 R IDEM
EST37 20121112203244545759584940423543 FEW NA 37 1 R IDEM
CST38 2230005162737434847484852423639 FEW NA NA 38 1 R IDEM
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00
East Central - all times are in EST
1 SPZ1617 FEW25221520303849596161595452495142 FEW NA 1 1 R IDEM
25 21 SPZ221825241920273544474647464745433841 FEW NA 25 1 R IDEM
40 2421201617151217253643495354534845433842 FEW NA 40 1 R IDEM
42 79141019171113273952596669675553474841 FEW NA 42 1 R IDEM
56 SPZ21201917191113203143485151545448494431 FEW NA 56 1 R IDEM
60 SPZ1115912141016284353586461565453474343 FEW NA 60 1 R IDEM
63 665289410233548495050505050433832 FEW NA 63 1 R IDEM
64 1212117810810273748515556585656524231 FEW NA 64 1 R IDEM
65 2521191820171414223349545654555645383835 FEW NA 65 1 R IDEM
66 281191407223951565755565452484541 FEW NA 66 1 R IDEM
68 131215121011312213347525556575052484338 FEW NA 68 1 R IDEM
71 99653109173546565959595454484338 PM NA 71 1 R IDEM
76 1514161915131320263746545456555552514330 FEW NA 76 1 R IDEM
78 06131223201115253443523835545250464224 FEW NA 78 1 R IDEM
80 0000000114334245464852483320105 FEW NA 80 1 R IDEM
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00
South West - refer to the first data column for each site's specific time zone
CST12 3118159121116273752605958585757595733 FEW NA NA 12 1 R IDEM
CST15 1011420110182949636359605959625951 FEW NA NA 15 1 R IDEM
CST20 1111781215153652576056576059544032 FEW NA NA 20 1 R IDEM
CST24 29231596815223352575658566163575042 FEW NA NA 24 1 R IDEM
CST33 1518147447182944626260555557575644 FEW NA NA 33 1 R IDEM
CST49 23212016141318253648585860606364665442 FEW NA NA 49 1 R IDEM
CST52 191715108711223749576157585963645334 FEW NA NA 52 1 R IDEM
EST67 8763571013213341475049505048474028 FEW NA 67 1 R IDEM
RegionCAMSMorningAfternoonCAMSPOCEntity
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00
South East - all times are in EST
3 SPZ CAL8530212233246636667606061555022 FEW NA 3 1 R IDEM
4 1462659915263648525253525355544251 FEW NA 4 1 R IDEM
59 SPZ54542211202848555757565757564323 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.

Key to Ozone Highlight Colors:

Hourly ozone levels have been mapped to a set of surrogate values based on custom 1-hour breakpoints.
The table below shows the levels, color-coding, and suggested actions for the 1-hour surrogate.

Ozone levels in this range are projected to be moderate based on the one-hour surrogate calculation for Ozone.
  • Unusually sensitive individuals may experience respiratory symptoms.
  • Unusually sensitive people should consider reducing prolonged or heavy outdoor exertion.

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.