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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 Wednesday, March 22, 2017.
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 40424545434341403941414143444343404237 FEW NA NA 6 1 R IDEM
13 40424344434240324042434243444546464646 FEW NA NA 13 1 R IDEM
16 43444645444140414242434444464748484847 FEW NA NA 16 1 R IDEM
28 40424343423939414040414243444545444241 FEW NA NA 28 1 R IDEM
31 41434546454444424244454646474848494948 FEW NA NA 31 1 R IDEM
34 39394138373634373838393940424343434238 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 3636373435353231363635363636363637393833 FEW NA 5 1 R IDEM
18 SPZ39404038373632363637373838404141414235 FEW NA 18 1 R IDEM
21 SPZ38394038373835394040404243454647464443 FEW NA 21 1 R IDEM
74 SPZ39393940403837404041424344464747464442 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 3538413939393636383939404143434443424036 FEW NA 7 1 R IDEM
19 38 SPZ393941393938404041414243444545454239 FEW NA 19 1 R IDEM
27 SPZ38394141383737373738383940414242413832 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 3940373533312933373739404142434443414039 FEW NA 9 1 R IDEM
EST36 3635343537353536393940404142434445464440 FEW NA 36 1 R IDEM
EST37 4138353332313135363738394141434343414139 FEW NA 37 1 R IDEM
CST38 41383633323031343738394041434443424142 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 SPZ36353633303034363636394143434343434034 FEW NA 1 1 R IDEM
25 3736353635353536343637383940414243434036 FEW NA 25 1 R IDEM
40 SPZ35363637383434353436343838394140393632 FEW NA 40 1 R IDEM
42 3937363735363536363635373941424343424137 FEW NA 42 1 R IDEM
56 3936363634323233333535363941424142413936 FEW NA 56 1 R IDEM
60 SPZ37363735353737373635384042434343434338 FEW NA 60 1 R IDEM
63 SPZ35323029303130323335343535373940403937 FEW NA 63 1 R IDEM
64 3939373635353434373637394142434444434238 FEW NA 64 1 R IDEM
65 3332323136363335363637394042424343434240 FEW NA 65 1 R IDEM
66 SPZ34323131313334363637373638404242423940 FEW NA 66 1 R IDEM
68 SPZ33323333293235353538394042434342424037 FEW NA 68 1 R IDEM
71 3635363637383637383838394141424343434238 FEW NA 71 1 R IDEM
76 4037363331313335353737394042434444434239 FEW NA 76 1 R IDEM
78 3230313025221919242528283331343537332825 FEW NA 78 1 R IDEM
80 42 SPZ403837363535363838384142434444444240 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 40393941414038383840424445474748484745 FEW NA NA 12 1 R IDEM
CST15 37363738383936373838394243464747464542 FEW NA NA 15 1 R IDEM
CST20 10172837393836363536364041434546464543 FEW NA NA 20 1 R IDEM
CST24 35343636383734363738394043454547474644 FEW NA NA 24 1 R IDEM
CST33 37353737363738383839404142454648484745 FEW NA NA 33 1 R IDEM
CST49 40424240393836373940414344464646474542 FEW NA NA 49 1 R IDEM
CST52 33303437373636363738404343454646454440 FEW NA NA 52 1 R IDEM
EST67 SPZ42404037363232353840424446464748474643 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 4142424138323232363838393839414140403833 FEW NA 3 1 R IDEM
4 4345434139383737373838373840414142413838 FEW NA 4 1 R IDEM
59 SPZ40393735322832363737394042434444444340 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.