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AQI Calculations on 05/27/2026 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 44 47 PPB
3:00 AM ACC PM10 24 Good 5 5 µg/m3
3:00 AM ACC PM2.5 24 Good 13 2 µg/m3
3:00 AM ADB PM10 24 Good 30 32 µg/m3
3:00 AM ADB PM2.5 24 Good 23 4 µg/m3
3:00 AM ALA PM10 24 Good 9 10 µg/m3
3:00 AM ALA PM2.5 24 Good 21 3 µg/m3
3:00 AM ASPN O3 8 Good 36 39 PPB
3:00 AM ASPN2 PM10 24 Good 7 8 µg/m3
3:00 AM ASPN2 PM2.5 24 Good 11 1 µg/m3
3:00 AM AURE O3 8 Moderate 51 55 PPB
3:00 AM BHWK O3 8 Good 41 44 PPB
3:00 AM BOU PM10 24 Good 14 15 µg/m3
3:00 AM BOU PM2.5 24 Good 19 3 µg/m3
3:00 AM BOUR O3 8 Good 38 41 PPB
3:00 AM CAMP NO2 1 Good 3 3 PPB
3:00 AM CAMP NO2 1 Good 3 3 PPB
3:00 AM CAMP O3 8 Good 49 53 PPB
3:00 AM CAMP PM10 24 Good 6 7 µg/m3
3:00 AM CAMP PM2.5 24 Good 15 2 µg/m3
3:00 AM CAN PM10 24 Good 11 12 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 6 6 PPB
3:00 AM CASA O3 8 Good 48 52 PPB
3:00 AM CASA PM10 24 Good 12 13 µg/m3
3:00 AM CASA PM2.5 24 Good 18 3 µg/m3
3:00 AM CCOL PM10 24 Good 12 13 µg/m3
3:00 AM CCOL PM2.5 24 Good 18 3 µg/m3
3:00 AM CTZ O3 8 Good 48 52 PPB
3:00 AM DELT PM10 24 Good 9 10 µg/m3
3:00 AM DELT PM2.5 24 Good 16 2 µg/m3
3:00 AM DELT PM2.5 24 Good 16 2 µg/m3
3:00 AM EVG O3 8 Good 31 33 PPB
3:00 AM FOS NO2 1 Good 5 5 PPB
3:00 AM FOS O3 8 Good 40 43 PPB
3:00 AM FTC CO 8 Good 1 0.1 PPM
3:00 AM FTC O3 8 Good 43 46 PPB
3:00 AM FTCF PM10 24 Good 14 15 µg/m3
3:00 AM FTCF PM2.5 24 Good 21 3 µg/m3
3:00 AM FTCW O3 8 Good 43 46 PPB
3:00 AM GJPB PM10 24 Good 4 4 µg/m3
3:00 AM GJPB PM2.5 24 Good 14 2 µg/m3
3:00 AM GREH PM10 24 Good 11 12 µg/m3
3:00 AM GREH PM2.5 24 Good 17 3 µg/m3
3:00 AM GRET CO 8 Good 1 0.1 PPM
3:00 AM GRET O3 8 Good 44 48 PPB
3:00 AM HLD O3 8 Moderate 54 56 PPB
3:00 AM I25DEN CO 8 Good 1 0.1 PPM
3:00 AM I25DEN NO2 1 Good 8 8 PPB
3:00 AM I25DEN PM10 24 Good 16 17 µg/m3
3:00 AM I25DEN PM2.5 24 Good 20 3 µg/m3
3:00 AM I25GLO NO2 1 Good 12 13 PPB
3:00 AM I25GLO PM10 24 Good 16 17 µg/m3
3:00 AM I25GLO PM2.5 24 Good 19 3 µg/m3
3:00 AM LAST NO2 1 Good 5 5 PPB
3:00 AM LAST O3 8 Good 42 45 PPB
3:00 AM LMB PM10 24 Good 12 13 µg/m3
3:00 AM LMB PM2.5 24 Good 19 3 µg/m3
3:00 AM LNGM PM10 24 Good 17 18 µg/m3
3:00 AM LNGM PM2.5 24 Good 24 4 µg/m3
3:00 AM MAN O3 8 Moderate 51 55 PPB
3:00 AM MFP NO2 1 Good 3 3 PPB
3:00 AM MFP O3 8 Good 45 49 PPB
3:00 AM NJH PM10 24 Good 10 11 µg/m3
3:00 AM NJH PM2.5 24 Good 17 3 µg/m3
3:00 AM NREL O3 8 Good 46 50 PPB
3:00 AM PAG PM10 24 Good 7 8 µg/m3
3:00 AM PAG PM2.5 24 Good 14 2 µg/m3
3:00 AM PAL O3 8 Good 40 43 PPB
3:00 AM PFS PM10 24 Good 13 14 µg/m3
3:00 AM PFS PM2.5 24 Good 16 2 µg/m3
3:00 AM PMS PM2.5 24 Good 21 3 µg/m3
3:00 AM PWES O3 8 Good 44 48 PPB
3:00 AM RFN NO2 1 Good 3 3 PPB
3:00 AM RFN O3 8 Good 46 50 PPB
3:00 AM RIFLO3 O3 8 Good 35 38 PPB
3:00 AM SSMB PM10 24 Good 9 10 µg/m3
3:00 AM SSMB PM2.5 24 Good 16 2 µg/m3
3:00 AM TEL PM10 24 Good 9 10 µg/m3
3:00 AM TEL PM2.5 24 Good 15 2 µg/m3
3:00 AM TIM NO2 1 Good 4 4 PPB
3:00 AM TIM O3 8 Good 40 43 PPB
3:00 AM TIM PM10 24 Good 17 18 µg/m3
3:00 AM TIM PM2.5 24 Good 21 3 µg/m3
3:00 AM WBY NO2 1 Good 7 7 PPB
3:00 AM WBY NO2 1 Good 7 7 PPB
3:00 AM WBY O3 8 Good 47 51 PPB
3:00 AM WBY PM10 24 Good 24 26 µg/m3
3:00 AM WBY PM2.5 24 Good 19 3 µg/m3
3:00 AM WBY SO2 1 Good 1 1 PPB
3:00 AM WBY SO2 1 Good 1 1 PPB
2:00 AM ACAD O3 8 Good 44 47 PPB
2:00 AM ACC PM10 24 Good 6 6 µg/m3
2:00 AM ACC PM2.5 24 Good 13 2 µg/m3
2:00 AM ADB PM10 24 Good 31 33 µg/m3
2:00 AM ADB PM2.5 24 Good 23 4 µg/m3
2:00 AM ALA PM10 24 Good 10 11 µg/m3
2:00 AM ALA PM2.5 24 Good 21 3 µg/m3
2:00 AM ASPN O3 8 Good 37 40 PPB
2:00 AM ASPN2 PM10 24 Good 7 8 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 11 1 µg/m3
2:00 AM AURE O3 8 Moderate 58 57 PPB
2:00 AM BHWK O3 8 Good 41 44 PPB
2:00 AM BOU PM10 24 Good 14 15 µg/m3
2:00 AM BOU PM2.5 24 Good 20 3 µg/m3
2:00 AM BOUR O3 8 Good 41 44 PPB
2:00 AM CAMP NO2 1 Good 3 3 PPB
2:00 AM CAMP NO2 1 Good 3 3 PPB
2:00 AM CAMP O3 8 Good 49 53 PPB
2:00 AM CAMP PM10 24 Good 6 7 µg/m3
2:00 AM CAMP PM2.5 24 Good 16 2 µg/m3
2:00 AM CAN PM10 24 Good 11 12 µg/m3
2:00 AM CAN PM2.5 24 Good 18 3 µg/m3
2:00 AM CASA CO 8 Good 1 0.1 PPM
2:00 AM CASA NO2 1 Good 12 13 PPB
2:00 AM CASA O3 8 Good 49 53 PPB
2:00 AM CASA PM10 24 Good 12 13 µg/m3
2:00 AM CASA PM2.5 24 Good 18 3 µg/m3
2:00 AM CCOL PM10 24 Good 12 13 µg/m3
2:00 AM CCOL PM2.5 24 Good 19 3 µg/m3
2:00 AM CTZ O3 8 Good 48 52 PPB
2:00 AM DELT PM10 24 Good 9 10 µg/m3
2:00 AM DELT PM2.5 24 Good 16 2 µg/m3
2:00 AM DELT PM2.5 24 Good 16 2 µg/m3
2:00 AM EVG O3 8 Good 32 35 PPB
2:00 AM FOS NO2 1 Good 4 4 PPB
2:00 AM FOS O3 8 Good 42 45 PPB
2:00 AM FTC CO 8 Good 1 0.1 PPM
2:00 AM FTC O3 8 Good 46 50 PPB
2:00 AM FTCF PM10 24 Good 15 16 µg/m3
2:00 AM FTCF PM2.5 24 Good 22 3 µg/m3
2:00 AM FTCW O3 8 Good 46 50 PPB
2:00 AM GJPB PM10 24 Good 4 4 µg/m3
2:00 AM GJPB PM2.5 24 Good 14 2 µg/m3
2:00 AM GREH PM10 24 Good 11 12 µg/m3
2:00 AM GREH PM2.5 24 Good 17 3 µg/m3
2:00 AM GRET CO 8 Good 1 0.1 PPM
2:00 AM GRET O3 8 Good 46 50 PPB
2:00 AM HLD O3 8 Moderate 54 56 PPB
2:00 AM I25DEN CO 8 Good 2 0.2 PPM
2:00 AM I25DEN NO2 1 Good 10 11 PPB
2:00 AM I25DEN PM10 24 Good 16 17 µg/m3
2:00 AM I25DEN PM2.5 24 Good 21 3 µg/m3
2:00 AM I25GLO NO2 1 Good 5 5 PPB
2:00 AM I25GLO PM10 24 Good 16 17 µg/m3
2:00 AM I25GLO PM2.5 24 Good 19 3 µg/m3
2:00 AM LAST NO2 1 Good 3 3 PPB
2:00 AM LAST O3 8 Good 44 48 PPB
2:00 AM LMB PM10 24 Good 12 13 µg/m3
2:00 AM LMB PM2.5 24 Good 19 3 µg/m3
2:00 AM LNGM PM10 24 Good 17 18 µg/m3
2:00 AM LNGM PM2.5 24 Good 24 4 µg/m3
2:00 AM MAN O3 8 Moderate 54 56 PPB
2:00 AM MFP NO2 1 Good 3 3 PPB
2:00 AM MFP O3 8 Good 48 52 PPB
2:00 AM NJH PM10 24 Good 11 12 µg/m3
2:00 AM NJH PM2.5 24 Good 17 3 µg/m3
2:00 AM NREL O3 8 Good 47 51 PPB
2:00 AM PAG PM10 24 Good 7 8 µg/m3
2:00 AM PAG PM2.5 24 Good 14 2 µg/m3
2:00 AM PAL O3 8 Good 43 46 PPB
2:00 AM PFS PM10 24 Good 13 14 µg/m3
2:00 AM PFS PM2.5 24 Good 16 2 µg/m3
2:00 AM PMS PM2.5 24 Good 21 3 µg/m3
2:00 AM PWES O3 8 Good 47 51 PPB
2:00 AM RFN NO2 1 Good 2 2 PPB
2:00 AM RFN O3 8 Good 49 53 PPB
2:00 AM RIFLO3 O3 8 Good 36 39 PPB
2:00 AM SSMB PM10 24 Good 9 10 µg/m3
2:00 AM SSMB PM2.5 24 Good 17 3 µg/m3
2:00 AM TEL PM10 24 Good 9 10 µg/m3
2:00 AM TEL PM2.5 24 Good 15 2 µg/m3
2:00 AM TIM NO2 1 Good 3 3 PPB
2:00 AM TIM O3 8 Good 43 46 PPB
2:00 AM TIM PM10 24 Good 18 19 µg/m3
2:00 AM TIM PM2.5 24 Good 21 3 µg/m3
2:00 AM WBY NO2 1 Good 5 5 PPB
2:00 AM WBY NO2 1 Good 5 5 PPB
2:00 AM WBY O3 8 Good 49 53 PPB
2:00 AM WBY PM10 24 Good 25 27 µg/m3
2:00 AM WBY PM2.5 24 Good 20 3 µg/m3
1:00 AM ACAD O3 8 Good 44 48 PPB
1:00 AM ACC PM10 24 Good 6 6 µg/m3
1:00 AM ACC PM2.5 24 Good 14 2 µg/m3
1:00 AM ADB PM10 24 Good 31 33 µg/m3
1:00 AM ADB PM2.5 24 Good 23 4 µg/m3
1:00 AM ALA PM10 24 Good 10 11 µg/m3
1:00 AM ALA PM2.5 24 Good 21 3 µg/m3
1:00 AM ASPN O3 8 Good 37 40 PPB
1:00 AM ASPN2 PM10 24 Good 8 9 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 11 2 µg/m3
1:00 AM AURE O3 8 Moderate 61 58 PPB
1:00 AM BHWK O3 8 Good 42 45 PPB
1:00 AM BOU PM10 24 Good 15 16 µg/m3
1:00 AM BOU PM2.5 24 Good 20 3 µg/m3
1:00 AM BOUR O3 8 Good 44 48 PPB
1:00 AM CAMP NO2 1 Good 4 4 PPB
1:00 AM CAMP NO2 1 Good 4 4 PPB
1:00 AM CAMP O3 8 Good 49 53 PPB
1:00 AM CAMP PM10 24 Good 6 7 µg/m3
1:00 AM CAMP PM2.5 24 Good 16 2 µg/m3
1:00 AM CAN PM10 24 Good 12 13 µg/m3
1:00 AM CAN PM2.5 24 Good 18 3 µg/m3
1:00 AM CASA CO 8 Good 1 0.1 PPM
1:00 AM CASA NO2 1 Good 5 5 PPB
1:00 AM CASA O3 8 Moderate 51 55 PPB
1:00 AM CASA PM10 24 Good 13 14 µg/m3
1:00 AM CASA PM2.5 24 Good 18 3 µg/m3
1:00 AM CCOL PM10 24 Good 13 14 µg/m3
1:00 AM CCOL PM2.5 24 Good 19 3 µg/m3
1:00 AM CTZ O3 8 Good 48 52 PPB
1:00 AM DELT PM10 24 Good 9 10 µg/m3
1:00 AM DELT PM2.5 24 Good 17 3 µg/m3
1:00 AM DELT PM2.5 24 Good 17 3 µg/m3
1:00 AM EVG O3 8 Good 36 39 PPB
1:00 AM FOS NO2 1 Good 4 4 PPB
1:00 AM FOS O3 8 Good 44 48 PPB
1:00 AM FTC CO 8 Good 1 0.1 PPM
1:00 AM FTC O3 8 Good 50 54 PPB
1:00 AM FTCF PM10 24 Good 16 17 µg/m3
1:00 AM FTCF PM2.5 24 Good 22 4 µg/m3
1:00 AM FTCW O3 8 Good 50 54 PPB
1:00 AM GJPB PM10 24 Good 4 4 µg/m3
1:00 AM GJPB PM2.5 24 Good 15 2 µg/m3
1:00 AM GREH PM10 24 Good 12 13 µg/m3
1:00 AM GREH PM2.5 24 Good 18 3 µg/m3
1:00 AM GRET CO 8 Good 1 0.1 PPM
1:00 AM GRET O3 8 Good 48 52 PPB
1:00 AM HLD O3 8 Moderate 54 56 PPB
1:00 AM I25DEN CO 8 Good 2 0.2 PPM
1:00 AM I25DEN NO2 1 Good 8 8 PPB
1:00 AM I25DEN PM10 24 Good 17 18 µg/m3
1:00 AM I25DEN PM2.5 24 Good 21 3 µg/m3
1:00 AM I25GLO NO2 1 Good 8 8 PPB
1:00 AM I25GLO PM10 24 Good 17 18 µg/m3
1:00 AM I25GLO PM2.5 24 Good 20 3 µg/m3
1:00 AM LAST NO2 1 Good 5 5 PPB
1:00 AM LAST O3 8 Good 46 50 PPB
1:00 AM LMB PM10 24 Good 12 13 µg/m3
1:00 AM LMB PM2.5 24 Good 19 3 µg/m3
1:00 AM LNGM PM10 24 Good 18 19 µg/m3
1:00 AM LNGM PM2.5 24 Good 24 4 µg/m3
1:00 AM MAN O3 8 Moderate 61 58 PPB
1:00 AM MFP NO2 1 Good 3 3 PPB
1:00 AM MFP O3 8 Moderate 51 55 PPB
1:00 AM NJH PM10 24 Good 11 12 µg/m3
1:00 AM NJH PM2.5 24 Good 17 3 µg/m3
1:00 AM NREL O3 8 Good 49 53 PPB
1:00 AM PAG PM10 24 Good 7 8 µg/m3
1:00 AM PAG PM2.5 24 Good 14 2 µg/m3
1:00 AM PAL O3 8 Good 45 49 PPB
1:00 AM PFS PM10 24 Good 13 14 µg/m3
1:00 AM PFS PM2.5 24 Good 16 2 µg/m3
1:00 AM PMS PM2.5 24 Good 22 3 µg/m3
1:00 AM PWES O3 8 Good 49 53 PPB
1:00 AM RFN NO2 1 Good 1 1 PPB
1:00 AM RFN O3 8 Moderate 51 55 PPB
1:00 AM RIFLO3 O3 8 Good 38 41 PPB
1:00 AM SSMB PM10 24 Good 9 10 µg/m3
1:00 AM SSMB PM2.5 24 Good 17 3 µg/m3
1:00 AM TEL PM10 24 Good 9 10 µg/m3
1:00 AM TEL PM2.5 24 Good 14 2 µg/m3
1:00 AM TIM NO2 1 Good 7 7 PPB
1:00 AM TIM O3 8 Good 45 49 PPB
1:00 AM TIM PM10 24 Good 18 19 µg/m3
1:00 AM TIM PM2.5 24 Good 22 3 µg/m3
1:00 AM WBY NO2 1 Good 6 6 PPB
1:00 AM WBY NO2 1 Good 6 6 PPB
1:00 AM WBY O3 8 Good 50 54 PPB
1:00 AM WBY PM10 24 Good 26 28 µg/m3
1:00 AM WBY PM2.5 24 Good 21 3 µg/m3

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