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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, June 19, 2018.
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
North West - all times are in CST
6 1721191613191713111721 FEW NA 6 1 R IDEM
13 2625242316212015152323 FEW NA 13 1 R IDEM
16 2727272425232216162324 FEW NA 16 1 R IDEM
28 2317201815141012223033 FEW NA 28 1 R IDEM
31 2423221918201914112121 FEW NA 31 1 R IDEM
34 2723181716121416202434 FEW 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
North Central - all times are in EST
5 363228262426242118283542 FEW 5 1 R IDEM
18 313131282319151621222533 FEW 18 1 R IDEM
21 272929262315131421293240 FEW 21 1 R IDEM
74 313230282623181922273239 FEW 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
North East - all times are in EST
7 373127231918172024282933 FEW 7 1 R IDEM
19 342924201917202424262632 FEW 19 1 R IDEM
27 332721211915151923283036 FEW 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
West Central - refer to the first data column for each site's specific time zone
EST9 293130292519182129363943 FEW 9 1 R IDEM
EST36 27192023185152633394342 FEW 36 1 R IDEM
EST37 282929282419162128333537 FEW 37 1 R IDEM
CST38 3130262012122227313335 FEW 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
East Central - all times are in EST
25 212221212217152534424339 FEW 25 1 R IDEM
40 342926262320223037444645 FEW 40 1 R IDEM
42 242829282723212531384542 FEW 42 1 R IDEM
56 292926241119202028384144 FEW 56 1 R IDEM
60 303233332924212833394344 FEW 60 1 R IDEM
63 313029292521192330333435 FEW 63 1 R IDEM
65 272730272116152331364441 FEW 65 1 R IDEM
66 222327292622182226 QAS3641 FEW 66 1 R IDEM
68 292725272715192533404343 FEW 68 1 R IDEM
71 333232252420263033383836 FEW 71 1 R IDEM
76 292828282819222834363533 FEW 76 1 R IDEM
78 SPN2324211710111822353642 FEW 78 1 R IDEM
79 303130272827293338424342 FEW 79 1 R IDEM
80 203028912782329323435 FEW 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
South West - refer to the first data column for each site's specific time zone
CST12 2122191714162126313542 FEW NA 12 1 R IDEM
CST15 282725211919 SPN25273236 FEW NA 15 1 R IDEM
CST24 2928272422202224272933 FEW NA 24 1 R IDEM
CST33 2422191716172024283135 FEW NA 33 1 R IDEM
CST49 2624222119182024313639 FEW NA 49 1 R IDEM
CST52 2319151011172023293535 FEW NA 52 1 R IDEM
EST67 33313026252321 FEW LOST LOST NA NA 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
South East - all times are in EST
3 332825242217202431363736 FEW 3 1 R IDEM
4 282624232019182428333634 FEW 4 1 R IDEM
59 131819232319212430343333 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.