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AQI Calculations on 05/28/2026 1:00AM - 3:00AM

The EPA (Environmental Protection Agency) developed the AQI (Air Quality Index) to make reading ambient air data more understandable to the general public. When ambient air data is collected, the numbers are converted from their concentration levels into numbers on a scale. That scale is the pollutant's AQI value. (Click here for a more detailed description of the AQI scale). Below is a list of all of the latest AQI values collected.


Due to limited system resources and high volume, today's AQI calculations can no longer be sorted by columns. For a CSV file of these data, updated hourly, click here.


All data are collected real-time and have not been corrected nor validated.

Time *
(MST)
 Monitoring Location Pollutant Interval
(Hr)
 Air Quality AQI Avg.
3:00 AM ACAD O3 8 Good 38 41 PPB
3:00 AM ACC PM10 24 Good 2 2 µg/m3
3:00 AM ACC PM2.5 24 Good 9 1 µg/m3
3:00 AM ADB PM10 24 Good 17 18 µg/m3
3:00 AM ADB PM2.5 24 Good 18 3 µg/m3
3:00 AM ALA PM10 24 Good 6 7 µg/m3
3:00 AM ALA PM2.5 24 Good 17 3 µg/m3
3:00 AM ASPN O3 8 Good 41 44 PPB
3:00 AM ASPN2 PM10 24 Good 7 8 µg/m3
3:00 AM ASPN2 PM2.5 24 Good 10 1 µg/m3
3:00 AM AURE O3 8 Good 39 42 PPB
3:00 AM BHWK O3 8 Good 42 45 PPB
3:00 AM BOU PM10 24 Good 9 10 µg/m3
3:00 AM BOU PM2.5 24 Good 17 3 µg/m3
3:00 AM BOUR O3 8 Good 28 30 PPB
3:00 AM CAMP NO2 1 Good 7 7 PPB
3:00 AM CAMP NO2 1 Good 7 7 PPB
3:00 AM CAMP O3 8 Good 44 47 PPB
3:00 AM CAMP PM10 24 Good 3 3 µg/m3
3:00 AM CAMP PM2.5 24 Good 12 2 µg/m3
3:00 AM CAN PM10 24 Good 6 7 µg/m3
3:00 AM CAN PM2.5 24 Good 17 3 µg/m3
3:00 AM CASA CO 8 Good 1 0.1 PPM
3:00 AM CASA NO2 1 Good 13 14 PPB
3:00 AM CASA O3 8 Good 42 45 PPB
3:00 AM CASA PM10 24 Good 13 14 µg/m3
3:00 AM CASA PM2.5 24 Good 15 2 µg/m3
3:00 AM CCOL PM10 24 Good 6 6 µg/m3
3:00 AM CCOL PM2.5 24 Good 17 3 µg/m3
3:00 AM CHAT O3 8 Good 39 42 PPB
3:00 AM CHAT PM10 24 Good 4 4 µg/m3
3:00 AM CHAT PM2.5 24 Good 9 1 µg/m3
3:00 AM CTZ O3 8 Good 40 43 PPB
3:00 AM DELT PM10 24 Good 15 16 µg/m3
3:00 AM DELT PM2.5 24 Good 21 3 µg/m3
3:00 AM DELT PM2.5 24 Good 21 3 µg/m3
3:00 AM EVG O3 8 Good 24 26 PPB
3:00 AM FTC CO 8 Good 1 0.1 PPM
3:00 AM FTC O3 8 Good 29 31 PPB
3:00 AM FTCF PM10 24 Good 12 13 µg/m3
3:00 AM FTCF PM2.5 24 Good 28 5 µg/m3
3:00 AM FTCW O3 8 Good 31 34 PPB
3:00 AM GJPB PM10 24 Good 5 5 µg/m3
3:00 AM GJPB PM2.5 24 Good 13 2 µg/m3
3:00 AM GREH PM10 24 Good 8 9 µg/m3
3:00 AM GREH PM2.5 24 Good 21 3 µg/m3
3:00 AM GRET CO 8 Good 1 0.1 PPM
3:00 AM GRET O3 8 Good 38 41 PPB
3:00 AM HLD O3 8 Good 47 51 PPB
3:00 AM I25DEN CO 8 Good 1 0.1 PPM
3:00 AM I25DEN NO2 1 Good 14 15 PPB
3:00 AM I25DEN PM10 24 Good 26 28 µg/m3
3:00 AM I25DEN PM2.5 24 Good 20 3 µg/m3
3:00 AM I25GLO NO2 1 Good 17 18 PPB
3:00 AM I25GLO PM10 24 Good 9 10 µg/m3
3:00 AM I25GLO PM2.5 24 Good 14 2 µg/m3
3:00 AM LAST NO2 1 Good 4 4 PPB
3:00 AM LAST O3 8 Good 30 32 PPB
3:00 AM LMB PM10 24 Good 9 10 µg/m3
3:00 AM LMB PM2.5 24 Good 28 5 µg/m3
3:00 AM LNGM PM10 24 Good 12 13 µg/m3
3:00 AM LNGM PM2.5 24 Good 24 4 µg/m3
3:00 AM MAN O3 8 Good 36 39 PPB
3:00 AM MFP NO2 1 Good 5 5 PPB
3:00 AM MFP O3 8 Good 33 36 PPB
3:00 AM NJH PM10 24 Good 6 7 µg/m3
3:00 AM NJH PM2.5 24 Good 13 2 µg/m3
3:00 AM NREL O3 8 Good 41 44 PPB
3:00 AM PAG PM10 24 Good 11 12 µg/m3
3:00 AM PAG PM2.5 24 Good 18 3 µg/m3
3:00 AM PAL O3 8 Good 44 48 PPB
3:00 AM PFS PM10 24 Good 6 6 µg/m3
3:00 AM PFS PM2.5 24 Good 20 3 µg/m3
3:00 AM PMS PM2.5 24 Good 16 2 µg/m3
3:00 AM PWES O3 8 Good 39 42 PPB
3:00 AM RFN NO2 1 Good 2 2 PPB
3:00 AM RFN O3 8 Good 42 45 PPB
3:00 AM RIFL PM2.5 24 Good 14 2 µg/m3
3:00 AM RIFLO3 O3 8 Good 41 44 PPB
3:00 AM SSMB PM10 24 Good 6 7 µg/m3
3:00 AM SSMB PM2.5 24 Good 10 1 µg/m3
3:00 AM TEL PM10 24 Good 15 16 µg/m3
3:00 AM TEL PM2.5 24 Good 19 3 µg/m3
3:00 AM TIM NO2 1 Good 4 4 PPB
3:00 AM TIM O3 8 Good 32 35 PPB
3:00 AM TIM PM10 24 Good 12 13 µg/m3
3:00 AM TIM PM2.5 24 Good 22 3 µg/m3
3:00 AM WBY NO2 1 Good 6 6 PPB
3:00 AM WBY NO2 1 Good 6 6 PPB
3:00 AM WBY O3 8 Good 43 46 PPB
3:00 AM WBY PM10 24 Good 15 16 µg/m3
3:00 AM WBY PM2.5 24 Good 16 2 µg/m3
2:00 AM ACAD O3 8 Good 39 42 PPB
2:00 AM ACC PM10 24 Good 2 2 µg/m3
2:00 AM ACC PM2.5 24 Good 9 1 µg/m3
2:00 AM ADB PM10 24 Good 17 18 µg/m3
2:00 AM ADB PM2.5 24 Good 18 3 µg/m3
2:00 AM ALA PM10 24 Good 6 7 µg/m3
2:00 AM ALA PM2.5 24 Good 17 3 µg/m3
2:00 AM ASPN O3 8 Good 42 45 PPB
2:00 AM ASPN2 PM10 24 Good 7 8 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 10 1 µg/m3
2:00 AM AURE O3 8 Good 41 44 PPB
2:00 AM BHWK O3 8 Good 44 48 PPB
2:00 AM BOU PM10 24 Good 9 10 µg/m3
2:00 AM BOU PM2.5 24 Good 17 3 µg/m3
2:00 AM BOUR O3 8 Good 31 34 PPB
2:00 AM CAMP NO2 1 Good 4 4 PPB
2:00 AM CAMP NO2 1 Good 4 4 PPB
2:00 AM CAMP O3 8 Good 47 51 PPB
2:00 AM CAMP PM10 24 Good 3 3 µg/m3
2:00 AM CAMP PM2.5 24 Good 12 2 µg/m3
2:00 AM CAN PM10 24 Good 6 7 µg/m3
2:00 AM CAN PM2.5 24 Good 17 3 µg/m3
2:00 AM CASA CO 8 Good 1 0.1 PPM
2:00 AM CASA NO2 1 Good 13 14 PPB
2:00 AM CASA O3 8 Good 46 50 PPB
2:00 AM CASA PM10 24 Good 13 14 µg/m3
2:00 AM CASA PM2.5 24 Good 15 2 µg/m3
2:00 AM CCOL PM10 24 Good 6 7 µg/m3
2:00 AM CCOL PM2.5 24 Good 17 3 µg/m3
2:00 AM CHAT O3 8 Good 44 48 PPB
2:00 AM CHAT PM10 24 Good 4 4 µg/m3
2:00 AM CHAT PM2.5 24 Good 9 1 µg/m3
2:00 AM CTZ O3 8 Good 45 49 PPB
2:00 AM DELT PM10 24 Good 15 16 µg/m3
2:00 AM DELT PM2.5 24 Good 20 3 µg/m3
2:00 AM DELT PM2.5 24 Good 20 3 µg/m3
2:00 AM EVG O3 8 Good 30 32 PPB
2:00 AM FOS NO2 1 Good 7 7 PPB
2:00 AM FTC CO 8 Good 1 0.1 PPM
2:00 AM FTC O3 8 Good 33 36 PPB
2:00 AM FTCF PM10 24 Good 12 13 µg/m3
2:00 AM FTCF PM2.5 24 Good 28 5 µg/m3
2:00 AM FTCW O3 8 Good 36 39 PPB
2:00 AM GJPB PM10 24 Good 5 5 µg/m3
2:00 AM GJPB PM2.5 24 Good 13 2 µg/m3
2:00 AM GREH PM10 24 Good 8 9 µg/m3
2:00 AM GREH PM2.5 24 Good 20 3 µg/m3
2:00 AM GRET CO 8 Good 1 0.1 PPM
2:00 AM GRET O3 8 Good 42 45 PPB
2:00 AM HLD O3 8 Good 50 54 PPB
2:00 AM I25DEN CO 8 Good 1 0.1 PPM
2:00 AM I25DEN NO2 1 Good 8 8 PPB
2:00 AM I25DEN PM10 24 Good 26 28 µg/m3
2:00 AM I25DEN PM2.5 24 Good 20 3 µg/m3
2:00 AM I25GLO NO2 1 Good 6 6 PPB
2:00 AM I25GLO PM10 24 Good 9 10 µg/m3
2:00 AM I25GLO PM2.5 24 Good 14 2 µg/m3
2:00 AM LAST NO2 1 Good 4 4 PPB
2:00 AM LAST O3 8 Good 35 38 PPB
2:00 AM LMB PM10 24 Good 8 9 µg/m3
2:00 AM LMB PM2.5 24 Good 28 5 µg/m3
2:00 AM LNGM PM10 24 Good 12 13 µg/m3
2:00 AM LNGM PM2.5 24 Good 23 4 µg/m3
2:00 AM MAN O3 8 Good 41 44 PPB
2:00 AM MFP NO2 1 Good 3 3 PPB
2:00 AM MFP O3 8 Good 37 40 PPB
2:00 AM NJH PM10 24 Good 6 7 µg/m3
2:00 AM NJH PM2.5 24 Good 13 2 µg/m3
2:00 AM NREL O3 8 Good 44 48 PPB
2:00 AM PAG PM10 24 Good 11 12 µg/m3
2:00 AM PAG PM2.5 24 Good 18 3 µg/m3
2:00 AM PAL O3 8 Good 48 52 PPB
2:00 AM PFS PM10 24 Good 6 6 µg/m3
2:00 AM PFS PM2.5 24 Good 19 3 µg/m3
2:00 AM PMS PM2.5 24 Good 16 2 µg/m3
2:00 AM PWES O3 8 Good 41 44 PPB
2:00 AM RFN NO2 1 Good 3 3 PPB
2:00 AM RFN O3 8 Good 44 48 PPB
2:00 AM RIFL PM2.5 24 Good 14 2 µg/m3
2:00 AM RIFLO3 O3 8 Good 44 48 PPB
2:00 AM SSMB PM10 24 Good 6 7 µg/m3
2:00 AM SSMB PM2.5 24 Good 11 1 µg/m3
2:00 AM TEL PM10 24 Good 15 16 µg/m3
2:00 AM TEL PM2.5 24 Good 19 3 µg/m3
2:00 AM TIM NO2 1 Good 4 4 PPB
2:00 AM TIM O3 8 Good 37 40 PPB
2:00 AM TIM PM10 24 Good 13 14 µg/m3
2:00 AM TIM PM2.5 24 Good 22 3 µg/m3
2:00 AM WBY NO2 1 Good 9 10 PPB
2:00 AM WBY NO2 1 Good 9 10 PPB
2:00 AM WBY O3 8 Good 45 49 PPB
2:00 AM WBY PM10 24 Good 15 16 µg/m3
2:00 AM WBY PM2.5 24 Good 16 2 µg/m3
1:00 AM ACAD O3 8 Good 40 43 PPB
1:00 AM ACC PM10 24 Good 2 2 µg/m3
1:00 AM ACC PM2.5 24 Good 9 1 µg/m3
1:00 AM ADB PM10 24 Good 17 18 µg/m3
1:00 AM ADB PM2.5 24 Good 18 3 µg/m3
1:00 AM ALA PM10 24 Good 6 7 µg/m3
1:00 AM ALA PM2.5 24 Good 17 3 µg/m3
1:00 AM ASPN O3 8 Good 43 46 PPB
1:00 AM ASPN2 PM10 24 Good 7 8 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 9 1 µg/m3
1:00 AM AURE O3 8 Good 43 46 PPB
1:00 AM BHWK O3 8 Good 46 50 PPB
1:00 AM BOU PM10 24 Good 9 10 µg/m3
1:00 AM BOU PM2.5 24 Good 17 3 µg/m3
1:00 AM BOUR O3 8 Good 35 38 PPB
1:00 AM CAMP NO2 1 Good 6 6 PPB
1:00 AM CAMP NO2 1 Good 6 6 PPB
1:00 AM CAMP O3 8 Good 49 53 PPB
1:00 AM CAMP PM10 24 Good 3 3 µg/m3
1:00 AM CAMP PM2.5 24 Good 12 2 µg/m3
1:00 AM CAN PM10 24 Good 6 7 µg/m3
1:00 AM CAN PM2.5 24 Good 17 3 µg/m3
1:00 AM CASA CO 8 Good 1 0.1 PPM
1:00 AM CASA NO2 1 Good 7 7 PPB
1:00 AM CASA O3 8 Good 49 53 PPB
1:00 AM CASA PM10 24 Good 13 14 µg/m3
1:00 AM CASA PM2.5 24 Good 16 2 µg/m3
1:00 AM CCOL PM10 24 Good 6 6 µg/m3
1:00 AM CCOL PM2.5 24 Good 16 2 µg/m3
1:00 AM CHAT O3 8 Good 47 51 PPB
1:00 AM CHAT PM10 24 Good 5 5 µg/m3
1:00 AM CHAT PM2.5 24 Good 9 1 µg/m3
1:00 AM CTZ O3 8 Good 49 53 PPB
1:00 AM DELT PM10 24 Good 15 16 µg/m3
1:00 AM DELT PM2.5 24 Good 20 3 µg/m3
1:00 AM DELT PM2.5 24 Good 20 3 µg/m3
1:00 AM EVG O3 8 Good 33 36 PPB
1:00 AM FTC CO 8 Good 1 0.1 PPM
1:00 AM FTC O3 8 Good 37 40 PPB
1:00 AM FTCF PM10 24 Good 12 13 µg/m3
1:00 AM FTCF PM2.5 24 Good 27 4 µg/m3
1:00 AM FTCW O3 8 Good 39 42 PPB
1:00 AM GJPB PM10 24 Good 5 5 µg/m3
1:00 AM GJPB PM2.5 24 Good 12 2 µg/m3
1:00 AM GREH PM10 24 Good 8 9 µg/m3
1:00 AM GREH PM2.5 24 Good 19 3 µg/m3
1:00 AM GRET CO 8 Good 1 0.1 PPM
1:00 AM GRET O3 8 Good 44 48 PPB
1:00 AM HLD O3 8 Moderate 54 56 PPB
1:00 AM I25DEN CO 8 Good 1 0.1 PPM
1:00 AM I25DEN NO2 1 Good 8 8 PPB
1:00 AM I25DEN PM10 24 Good 26 28 µg/m3
1:00 AM I25DEN PM2.5 24 Good 20 3 µg/m3
1:00 AM I25GLO NO2 1 Good 8 9 PPB
1:00 AM I25GLO PM10 24 Good 9 10 µg/m3
1:00 AM I25GLO PM2.5 24 Good 15 2 µg/m3
1:00 AM LAST NO2 1 Good 6 6 PPB
1:00 AM LAST O3 8 Good 39 42 PPB
1:00 AM LMB PM10 24 Good 8 9 µg/m3
1:00 AM LMB PM2.5 24 Good 27 4 µg/m3
1:00 AM LNGM PM10 24 Good 12 13 µg/m3
1:00 AM LNGM PM2.5 24 Good 23 4 µg/m3
1:00 AM MAN O3 8 Good 43 46 PPB
1:00 AM MFP NO2 1 Good 3 3 PPB
1:00 AM MFP O3 8 Good 40 43 PPB
1:00 AM NJH PM10 24 Good 6 7 µg/m3
1:00 AM NJH PM2.5 24 Good 14 2 µg/m3
1:00 AM NREL O3 8 Good 47 51 PPB
1:00 AM PAG PM10 24 Good 11 12 µg/m3
1:00 AM PAG PM2.5 24 Good 17 3 µg/m3
1:00 AM PAL O3 8 Moderate 51 55 PPB
1:00 AM PFS PM10 24 Good 6 6 µg/m3
1:00 AM PFS PM2.5 24 Good 18 3 µg/m3
1:00 AM PMS PM2.5 24 Good 16 2 µg/m3
1:00 AM PWES O3 8 Good 43 46 PPB
1:00 AM RFN NO2 1 Good 2 2 PPB
1:00 AM RFN O3 8 Good 46 50 PPB
1:00 AM RIFL PM2.5 24 Good 15 2 µg/m3
1:00 AM RIFLO3 O3 8 Good 46 50 PPB
1:00 AM SSMB PM10 24 Good 6 7 µg/m3
1:00 AM SSMB PM2.5 24 Good 11 1 µg/m3
1:00 AM TEL PM10 24 Good 15 16 µg/m3
1:00 AM TEL PM2.5 24 Good 19 3 µg/m3
1:00 AM TIM NO2 1 Good 5 5 PPB
1:00 AM TIM O3 8 Good 39 42 PPB
1:00 AM TIM PM10 24 Good 13 14 µg/m3
1:00 AM TIM PM2.5 24 Good 21 3 µg/m3
1:00 AM WBY NO2 1 Good 8 8 PPB
1:00 AM WBY NO2 1 Good 8 8 PPB
1:00 AM WBY O3 8 Good 48 52 PPB
1:00 AM WBY PM10 24 Good 15 16 µg/m3
1:00 AM WBY PM2.5 24 Good 16 2 µg/m3

* All data are reported in Mountain Standard Time (MST). During daylight savings time add one hour to the reported hour.