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AQI Calculations on 06/23/2026 1:00AM - 4:00AM

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.
4:00 AM ACAD O3 8 Good 36 39 PPB
4:00 AM ACC PM10 24 Good 22 24 µg/m3
4:00 AM ACC PM2.5 24 Good 42 7 µg/m3
4:00 AM ADB PM10 24 Good 48 52 µg/m3
4:00 AM ADB PM2.5 24 Moderate 53 10 µg/m3
4:00 AM ALA PM10 24 Good 41 44 µg/m3
4:00 AM ALA PM2.5 24 Good 40 7 µg/m3
4:00 AM AURE O3 8 Good 45 49 PPB
4:00 AM BHWK O3 8 Moderate 54 56 PPB
4:00 AM BOU PM10 24 Good 32 35 µg/m3
4:00 AM BOU PM2.5 24 Good 47 8 µg/m3
4:00 AM BOUR O3 8 Good 32 35 PPB
4:00 AM CAMP PM10 24 Good 19 20 µg/m3
4:00 AM CAMP PM2.5 24 Good 46 8 µg/m3
4:00 AM CAN PM10 24 Good 31 33 µg/m3
4:00 AM CAN PM2.5 24 Good 45 8 µg/m3
4:00 AM CASA CO 8 Good 1 0.1 PPM
4:00 AM CASA NO2 1 Good 5 5 PPB
4:00 AM CASA O3 8 Good 40 43 PPB
4:00 AM CASA PM10 24 Good 34 37 µg/m3
4:00 AM CASA PM2.5 24 Good 46 8 µg/m3
4:00 AM CCOL PM10 24 Good 29 31 µg/m3
4:00 AM CCOL PM2.5 24 Good 43 7 µg/m3
4:00 AM CTZ O3 8 Good 32 35 PPB
4:00 AM DELT PM10 24 Good 30 32 µg/m3
4:00 AM DELT PM2.5 24 Moderate 52 9 µg/m3
4:00 AM DELT PM2.5 24 Moderate 52 9 µg/m3
4:00 AM EVG O3 8 Good 44 48 PPB
4:00 AM FTC CO 8 Good 0 0.0 PPM
4:00 AM FTC O3 8 Good 36 39 PPB
4:00 AM FTCF PM10 24 Good 34 37 µg/m3
4:00 AM FTCF PM2.5 24 Moderate 52 9 µg/m3
4:00 AM FTCW O3 8 Good 34 37 PPB
4:00 AM GJPB PM10 24 Good 15 16 µg/m3
4:00 AM GJPB PM2.5 24 Good 34 6 µg/m3
4:00 AM GREH PM10 24 Good 23 25 µg/m3
4:00 AM GREH PM2.5 24 Moderate 54 10 µg/m3
4:00 AM GRET CO 8 Good 1 0.1 PPM
4:00 AM GRET O3 8 Good 34 37 PPB
4:00 AM HLD O3 8 Good 45 49 PPB
4:00 AM I25DEN CO 8 Good 2 0.2 PPM
4:00 AM I25DEN NO2 1 Good 17 18 PPB
4:00 AM I25DEN PM10 24 Good 37 40 µg/m3
4:00 AM I25DEN PM2.5 24 Moderate 51 9 µg/m3
4:00 AM I25GLO NO2 1 Good 19 20 PPB
4:00 AM I25GLO PM10 24 Good 40 43 µg/m3
4:00 AM I25GLO PM2.5 24 Good 49 8 µg/m3
4:00 AM LAST NO2 1 Good 5 5 PPB
4:00 AM LAST O3 8 Good 30 32 PPB
4:00 AM LMB PM10 24 Good 12 13 µg/m3
4:00 AM LMB PM2.5 24 Good 34 6 µg/m3
4:00 AM LNGM PM10 24 Good 43 46 µg/m3
4:00 AM LNGM PM2.5 24 Moderate 54 10 µg/m3
4:00 AM MAN O3 8 Good 41 44 PPB
4:00 AM MFP NO2 1 Good 2 2 PPB
4:00 AM MFP O3 8 Good 39 42 PPB
4:00 AM NJH PM10 24 Good 33 36 µg/m3
4:00 AM NJH PM2.5 24 Moderate 51 9 µg/m3
4:00 AM NREL O3 8 Good 43 46 PPB
4:00 AM PAG PM10 24 Good 21 23 µg/m3
4:00 AM PAG PM2.5 24 Good 28 5 µg/m3
4:00 AM PAL O3 8 Good 45 49 PPB
4:00 AM PFS PM10 24 Good 31 34 µg/m3
4:00 AM PFS PM2.5 24 Good 40 7 µg/m3
4:00 AM PMS PM2.5 24 Good 48 8 µg/m3
4:00 AM PWES O3 8 Good 35 38 PPB
4:00 AM RFN NO2 1 Good 2 2 PPB
4:00 AM RFN O3 8 Good 41 44 PPB
4:00 AM RIFLO3 O3 8 Good 31 34 PPB
4:00 AM SSMB PM10 24 Good 19 21 µg/m3
4:00 AM SSMB PM2.5 24 Good 39 7 µg/m3
4:00 AM TEL PM10 24 Good 21 23 µg/m3
4:00 AM TEL PM2.5 24 Good 35 6 µg/m3
4:00 AM TIM NO2 1 Good 4 4 PPB
4:00 AM TIM O3 8 Good 32 35 PPB
4:00 AM TIM PM10 24 Good 29 31 µg/m3
4:00 AM TIM PM2.5 24 Good 44 7 µg/m3
4:00 AM WBY NO2 1 Good 6 6 PPB
4:00 AM WBY NO2 1 Good 6 6 PPB
4:00 AM WBY O3 8 Good 41 44 PPB
4:00 AM WBY PM10 24 Good 38 41 µg/m3
4:00 AM WBY PM2.5 24 Good 48 8 µg/m3
3:00 AM ACAD O3 8 Good 39 42 PPB
3:00 AM ACC PM10 24 Good 21 23 µg/m3
3:00 AM ACC PM2.5 24 Good 41 7 µg/m3
3:00 AM ADB PM10 24 Good 47 51 µg/m3
3:00 AM ADB PM2.5 24 Moderate 53 10 µg/m3
3:00 AM ALA PM10 24 Good 42 45 µg/m3
3:00 AM ALA PM2.5 24 Good 41 7 µg/m3
3:00 AM AURE O3 8 Good 48 52 PPB
3:00 AM BHWK O3 8 Moderate 61 58 PPB
3:00 AM BOU PM10 24 Good 31 34 µg/m3
3:00 AM BOU PM2.5 24 Good 46 8 µg/m3
3:00 AM BOUR O3 8 Good 35 38 PPB
3:00 AM CAMP PM10 24 Good 19 20 µg/m3
3:00 AM CAMP PM2.5 24 Good 47 8 µg/m3
3:00 AM CAN PM10 24 Good 31 33 µg/m3
3:00 AM CAN PM2.5 24 Good 44 8 µg/m3
3:00 AM CASA CO 8 Good 1 0.1 PPM
3:00 AM CASA NO2 1 Good 5 5 PPB
3:00 AM CASA O3 8 Good 44 47 PPB
3:00 AM CASA PM10 24 Good 33 36 µg/m3
3:00 AM CASA PM2.5 24 Good 46 8 µg/m3
3:00 AM CCOL PM10 24 Good 29 31 µg/m3
3:00 AM CCOL PM2.5 24 Good 43 7 µg/m3
3:00 AM CTZ O3 8 Good 34 37 PPB
3:00 AM DELT PM10 24 Good 31 33 µg/m3
3:00 AM DELT PM2.5 24 Moderate 52 9 µg/m3
3:00 AM DELT PM2.5 24 Moderate 52 9 µg/m3
3:00 AM EVG O3 8 Good 46 50 PPB
3:00 AM FTC CO 8 Good 1 0.1 PPM
3:00 AM FTC O3 8 Good 39 42 PPB
3:00 AM FTCF PM10 24 Good 34 37 µg/m3
3:00 AM FTCF PM2.5 24 Moderate 52 9 µg/m3
3:00 AM FTCW O3 8 Good 37 40 PPB
3:00 AM GJPB PM10 24 Good 15 16 µg/m3
3:00 AM GJPB PM2.5 24 Good 34 6 µg/m3
3:00 AM GREH PM10 24 Good 22 24 µg/m3
3:00 AM GREH PM2.5 24 Moderate 53 10 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 48 52 PPB
3:00 AM I25DEN CO 8 Good 2 0.2 PPM
3:00 AM I25DEN NO2 1 Good 11 12 PPB
3:00 AM I25DEN PM10 24 Good 36 39 µg/m3
3:00 AM I25DEN PM2.5 24 Moderate 51 9 µg/m3
3:00 AM I25GLO NO2 1 Good 16 17 PPB
3:00 AM I25GLO PM10 24 Good 38 41 µg/m3
3:00 AM I25GLO PM2.5 24 Good 49 8 µg/m3
3:00 AM LAST NO2 1 Good 6 6 PPB
3:00 AM LAST O3 8 Good 33 36 PPB
3:00 AM LMB PM10 24 Good 12 13 µg/m3
3:00 AM LMB PM2.5 24 Good 34 6 µg/m3
3:00 AM LNGM PM10 24 Good 43 46 µg/m3
3:00 AM LNGM PM2.5 24 Moderate 54 10 µg/m3
3:00 AM MAN O3 8 Good 44 47 PPB
3:00 AM MFP NO2 1 Good 2 2 PPB
3:00 AM MFP O3 8 Good 41 44 PPB
3:00 AM NJH PM10 24 Good 32 35 µg/m3
3:00 AM NJH PM2.5 24 Good 50 9 µg/m3
3:00 AM NREL O3 8 Good 44 48 PPB
3:00 AM PAG PM10 24 Good 21 23 µg/m3
3:00 AM PAG PM2.5 24 Good 29 5 µg/m3
3:00 AM PAL O3 8 Good 47 51 PPB
3:00 AM PFS PM10 24 Good 31 34 µg/m3
3:00 AM PFS PM2.5 24 Good 40 7 µg/m3
3:00 AM PMS PM2.5 24 Good 49 8 µg/m3
3:00 AM PWES O3 8 Good 38 41 PPB
3:00 AM RFN NO2 1 Good 1 1 PPB
3:00 AM RFN O3 8 Good 44 47 PPB
3:00 AM RIFLO3 O3 8 Good 34 37 PPB
3:00 AM SSMB PM10 24 Good 19 20 µg/m3
3:00 AM SSMB PM2.5 24 Good 38 6 µg/m3
3:00 AM TEL PM10 24 Good 22 24 µg/m3
3:00 AM TEL PM2.5 24 Good 37 6 µg/m3
3:00 AM TIM NO2 1 Good 5 5 PPB
3:00 AM TIM O3 8 Good 36 39 PPB
3:00 AM TIM PM10 24 Good 29 31 µg/m3
3:00 AM TIM PM2.5 24 Good 43 7 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 44 47 PPB
3:00 AM WBY PM10 24 Good 37 40 µg/m3
3:00 AM WBY PM2.5 24 Good 48 8 µg/m3
2:00 AM ACAD O3 8 Good 41 44 PPB
2:00 AM ACC PM10 24 Good 21 23 µg/m3
2:00 AM ACC PM2.5 24 Good 39 7 µg/m3
2:00 AM ADB PM10 24 Good 45 49 µg/m3
2:00 AM ADB PM2.5 24 Moderate 53 10 µg/m3
2:00 AM ALA PM10 24 Good 42 45 µg/m3
2:00 AM ALA PM2.5 24 Good 42 7 µg/m3
2:00 AM AURE O3 8 Moderate 51 55 PPB
2:00 AM BHWK O3 8 Moderate 67 60 PPB
2:00 AM BOU PM10 24 Good 31 33 µg/m3
2:00 AM BOU PM2.5 24 Good 45 8 µg/m3
2:00 AM BOUR O3 8 Good 39 42 PPB
2:00 AM CAMP PM10 24 Good 19 20 µg/m3
2:00 AM CAMP PM2.5 24 Good 47 8 µg/m3
2:00 AM CAN PM10 24 Good 31 34 µg/m3
2:00 AM CAN PM2.5 24 Good 44 7 µg/m3
2:00 AM CASA CO 8 Good 1 0.1 PPM
2:00 AM CASA NO2 1 Good 6 6 PPB
2:00 AM CASA O3 8 Good 46 50 PPB
2:00 AM CASA PM10 24 Good 31 34 µg/m3
2:00 AM CASA PM2.5 24 Good 46 8 µg/m3
2:00 AM CCOL PM10 24 Good 29 31 µg/m3
2:00 AM CCOL PM2.5 24 Good 42 7 µg/m3
2:00 AM CTZ O3 8 Good 38 41 PPB
2:00 AM DELT PM10 24 Good 31 33 µg/m3
2:00 AM DELT PM2.5 24 Moderate 53 10 µg/m3
2:00 AM DELT PM2.5 24 Moderate 53 10 µg/m3
2:00 AM EVG O3 8 Good 49 53 PPB
2:00 AM FTC CO 8 Good 1 0.1 PPM
2:00 AM FTC O3 8 Good 42 45 PPB
2:00 AM FTCF PM10 24 Good 33 36 µg/m3
2:00 AM FTCF PM2.5 24 Moderate 52 9 µg/m3
2:00 AM FTCW O3 8 Good 41 44 PPB
2:00 AM GJPB PM10 24 Good 15 16 µg/m3
2:00 AM GJPB PM2.5 24 Good 34 6 µg/m3
2:00 AM GREH PM10 24 Good 22 24 µg/m3
2:00 AM GREH PM2.5 24 Moderate 53 10 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 Moderate 51 55 PPB
2:00 AM I25DEN CO 8 Good 2 0.2 PPM
2:00 AM I25DEN NO2 1 Good 9 10 PPB
2:00 AM I25DEN PM10 24 Good 34 37 µg/m3
2:00 AM I25DEN PM2.5 24 Good 50 9 µg/m3
2:00 AM I25GLO NO2 1 Good 17 18 PPB
2:00 AM I25GLO PM10 24 Good 37 40 µg/m3
2:00 AM I25GLO PM2.5 24 Good 49 8 µg/m3
2:00 AM LAST NO2 1 Good 6 6 PPB
2:00 AM LAST O3 8 Good 37 40 PPB
2:00 AM LMB PM10 24 Good 13 14 µg/m3
2:00 AM LMB PM2.5 24 Good 34 6 µg/m3
2:00 AM LNGM PM10 24 Good 42 45 µg/m3
2:00 AM LNGM PM2.5 24 Moderate 54 10 µg/m3
2:00 AM MAN O3 8 Good 47 51 PPB
2:00 AM MFP NO2 1 Good 2 2 PPB
2:00 AM MFP O3 8 Good 44 48 PPB
2:00 AM NJH PM10 24 Good 30 32 µg/m3
2:00 AM NJH PM2.5 24 Good 49 8 µg/m3
2:00 AM NREL O3 8 Good 48 52 PPB
2:00 AM PAG PM10 24 Good 21 23 µg/m3
2:00 AM PAG PM2.5 24 Good 29 5 µg/m3
2:00 AM PAL O3 8 Good 50 54 PPB
2:00 AM PFS PM10 24 Good 31 34 µg/m3
2:00 AM PFS PM2.5 24 Good 41 7 µg/m3
2:00 AM PMS PM2.5 24 Good 49 8 µg/m3
2:00 AM PWES O3 8 Good 41 44 PPB
2:00 AM RFN NO2 1 Good 1 1 PPB
2:00 AM RFN O3 8 Good 46 50 PPB
2:00 AM RIFLO3 O3 8 Good 38 41 PPB
2:00 AM SSMB PM10 24 Good 19 20 µg/m3
2:00 AM SSMB PM2.5 24 Good 36 6 µg/m3
2:00 AM TEL PM10 24 Good 23 25 µg/m3
2:00 AM TEL PM2.5 24 Good 39 7 µg/m3
2:00 AM TIM NO2 1 Good 3 3 PPB
2:00 AM TIM O3 8 Good 41 44 PPB
2:00 AM TIM PM10 24 Good 29 31 µg/m3
2:00 AM TIM PM2.5 24 Good 43 7 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 47 51 PPB
2:00 AM WBY PM10 24 Good 36 39 µg/m3
2:00 AM WBY PM2.5 24 Good 48 8 µg/m3
1:00 AM ACAD O3 8 Good 43 46 PPB
1:00 AM ACC PM10 24 Good 19 21 µg/m3
1:00 AM ACC PM2.5 24 Good 38 6 µg/m3
1:00 AM ADB PM10 24 Good 44 47 µg/m3
1:00 AM ADB PM2.5 24 Moderate 52 9 µg/m3
1:00 AM ALA PM10 24 Good 43 46 µg/m3
1:00 AM ALA PM2.5 24 Good 43 7 µg/m3
1:00 AM AURE O3 8 Moderate 61 58 PPB
1:00 AM BHWK O3 8 Moderate 77 63 PPB
1:00 AM BOU PM10 24 Good 30 32 µg/m3
1:00 AM BOU PM2.5 24 Good 44 8 µg/m3
1:00 AM BOUR O3 8 Good 43 46 PPB
1:00 AM CAMP PM10 24 Good 19 20 µg/m3
1:00 AM CAMP PM2.5 24 Good 48 8 µg/m3
1:00 AM CAN PM10 24 Good 31 34 µg/m3
1:00 AM CAN PM2.5 24 Good 43 7 µg/m3
1:00 AM CASA CO 8 Good 1 0.1 PPM
1:00 AM CASA NO2 1 Good 4 4 PPB
1:00 AM CASA O3 8 Moderate 51 55 PPB
1:00 AM CASA PM10 24 Good 30 32 µg/m3
1:00 AM CASA PM2.5 24 Good 45 8 µg/m3
1:00 AM CCOL PM10 24 Good 30 32 µg/m3
1:00 AM CCOL PM2.5 24 Good 42 7 µg/m3
1:00 AM CTZ O3 8 Good 41 44 PPB
1:00 AM DELT PM10 24 Good 31 34 µg/m3
1:00 AM DELT PM2.5 24 Moderate 53 10 µg/m3
1:00 AM DELT PM2.5 24 Moderate 53 10 µg/m3
1:00 AM EVG O3 8 Moderate 61 58 PPB
1:00 AM FTC CO 8 Good 1 0.1 PPM
1:00 AM FTC O3 8 Good 45 49 PPB
1:00 AM FTCF PM10 24 Good 33 36 µg/m3
1:00 AM FTCF PM2.5 24 Moderate 52 9 µg/m3
1:00 AM FTCW O3 8 Good 44 48 PPB
1:00 AM GJPB PM10 24 Good 15 16 µg/m3
1:00 AM GJPB PM2.5 24 Good 34 6 µg/m3
1:00 AM GREH PM10 24 Good 22 24 µg/m3
1:00 AM GREH PM2.5 24 Moderate 53 10 µg/m3
1:00 AM GRET CO 8 Good 1 0.1 PPM
1:00 AM GRET O3 8 Good 45 49 PPB
1:00 AM HLD O3 8 Moderate 64 59 PPB
1:00 AM I25DEN CO 8 Good 2 0.2 PPM
1:00 AM I25DEN NO2 1 Good 9 10 PPB
1:00 AM I25DEN PM10 24 Good 32 35 µg/m3
1:00 AM I25DEN PM2.5 24 Good 50 9 µg/m3
1:00 AM I25GLO NO2 1 Good 13 14 PPB
1:00 AM I25GLO PM10 24 Good 35 38 µg/m3
1:00 AM I25GLO PM2.5 24 Good 48 8 µg/m3
1:00 AM LAST NO2 1 Good 7 7 PPB
1:00 AM LAST O3 8 Good 43 46 PPB
1:00 AM LNGM PM10 24 Good 42 45 µg/m3
1:00 AM LNGM PM2.5 24 Moderate 54 10 µg/m3
1:00 AM MAN O3 8 Good 50 54 PPB
1:00 AM MFP NO2 1 Good 2 2 PPB
1:00 AM MFP O3 8 Good 47 51 PPB
1:00 AM NJH PM10 24 Good 29 31 µg/m3
1:00 AM NJH PM2.5 24 Good 49 8 µg/m3
1:00 AM NREL O3 8 Moderate 54 56 PPB
1:00 AM PAG PM10 24 Good 22 24 µg/m3
1:00 AM PAG PM2.5 24 Good 30 5 µg/m3
1:00 AM PAL O3 8 Moderate 54 56 PPB
1:00 AM PFS PM10 24 Good 31 34 µg/m3
1:00 AM PFS PM2.5 24 Good 40 7 µg/m3
1:00 AM PMS PM2.5 24 Good 48 8 µg/m3
1:00 AM PWES O3 8 Good 44 47 PPB
1:00 AM RFN NO2 1 Good 1 1 PPB
1:00 AM RFN O3 8 Good 50 54 PPB
1:00 AM RIFLO3 O3 8 Good 43 46 PPB
1:00 AM SSMB PM10 24 Good 19 20 µg/m3
1:00 AM SSMB PM2.5 24 Good 35 6 µg/m3
1:00 AM TEL PM10 24 Good 25 27 µg/m3
1:00 AM TEL PM2.5 24 Good 42 7 µg/m3
1:00 AM TIM NO2 1 Good 2 2 PPB
1:00 AM TIM O3 8 Good 45 49 PPB
1:00 AM TIM PM10 24 Good 29 31 µg/m3
1:00 AM TIM PM2.5 24 Good 43 7 µg/m3
1:00 AM WBY NO2 1 Good 5 5 PPB
1:00 AM WBY NO2 1 Good 5 5 PPB
1:00 AM WBY O3 8 Moderate 51 55 PPB
1:00 AM WBY PM10 24 Good 34 37 µg/m3
1:00 AM WBY PM2.5 24 Good 47 8 µg/m3

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