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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)
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Ozone Hourly Averages for Monday, September 26, 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 9:0010:00
North West - all times are in CST
6 QAS LIM LIM LIM LIM LIM LIM PM PM PM PM LIM LIM LIM LIM LIM LIM LIM LIM LIM LIM NA NA 6 1 R IDEM
13 211910816208101626333436363738363329174 NA NA 13 1 R IDEM
16 14141311131716131718141110917303030292722 NA NA 16 1 R IDEM
28 17171613118101114243134363738393836302726 NA NA 28 1 R IDEM
31 14139634581524293133323534342725177 NA NA 31 1 R IDEM
34 131516126510118162630333435353529272014 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 9:0010:00
North Central - all times are in EST
5 27191816161385712152631343536353331272423 FEW 5 1 R IDEM
18 2925222018151191114172232353739393531232121 NA 18 1 R IDEM
21 191816151511108710152633363738383832272221 NA 21 1 R IDEM
74 3323211918161281115192835373939383734272624 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 9:0010:00
North East - all times are in EST
7 37393333241718141511121626323637383834312828 NA 7 1 R IDEM
19 24293130221617161412141624313437373727181422 NA 19 1 R IDEM
27 44353028181415161311121726323436383734322824 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 9:0010:00
West Central - refer to the first data column for each site's specific time zone
EST9 3223202019141311111216233034373941403529189 NA 9 1 R IDEM
EST36 SPZ19141617141111911172633363839404037272021 NA 36 1 R IDEM
EST37 31211919181413121111152330343739404132252623 NA 37 1 R IDEM
CST38 232020171614121010152230343838383934232326 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 9:0010:00
East Central - all times are in EST
1 SPZ283724151619131111141620263133373527111214 NA 1 1 R IDEM
25 31 SPZ3132161416161412131621263134363733312819 NA 25 1 R IDEM
40 SPN364033261514161713131721263035363531302925 NA 40 1 R IDEM
42 SPZ CAL FEW21151819151211141621273133373425648 NA 42 1 R IDEM
56 SPZ3231161417139791113192327313231259109 NA 56 1 R IDEM
60 SPZ3142231516191612111315202731343737271466 NA 60 1 R IDEM
63 40372317151814131212141621283234353627262927 NA 63 1 R IDEM
64 39343831181416191714141721263033343327232122 NA 64 1 R IDEM
65 38251713151712101010121826303437383834272422 NA 65 1 R IDEM
66 37282517171816141314151824303539393735292126 NA 66 1 R IDEM
68 37353532171414181512141621263034373630262218 NA 68 1 R IDEM
71 38383621161619161313151623293335394038312419 NA 71 1 R IDEM
76 33323328271613171816161922262830323127252323 NA 76 1 R IDEM
78 25253018131077568101318 PM2225181115713 NA 78 1 R IDEM
80 061513171414151613141618232630312310643 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 9:0010:00
South West - refer to the first data column for each site's specific time zone
CST12 16173021221915141718192328313332342918125 NA NA 12 1 R IDEM
CST15 92725172014101216151720272931323224530 NA NA 15 1 R IDEM
CST20 192228191817121416161823273033333421200 NA NA 20 1 R IDEM
CST24 353622201916131716151723282931343428212123 NA NA 24 1 R IDEM
CST33 223123211713131616161823282931333331221915 NA NA 33 1 R IDEM
CST49 463932302324241816161822242630303024141920 NA NA 49 1 R IDEM
CST52 2932322024201414171820212831323332251395 NA NA 52 1 R IDEM
EST67 44322719162017151515151824293336404032313029 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 9:0010:00
South East - all times are in EST
3 996493120192320161619222626272914100 FEW 3 1 R IDEM
4 181314111072118221920151721232426272115133 FEW 4 1 R IDEM
59 SPZ201524252017142118172023272929313223121414 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.