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AQI Calculations on 03/11/2026 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 30 32 PPB
4:00 AM ACC PM10 24 Good 30 32 µg/m3
4:00 AM ACC PM2.5 24 Good 49 8 µg/m3
4:00 AM ADB PM10 24 Good 49 53 µg/m3
4:00 AM ADB PM2.5 24 Good 42 7 µg/m3
4:00 AM ALA PM10 24 Good 20 22 µg/m3
4:00 AM ALA PM2.5 24 Good 31 5 µg/m3
4:00 AM ASPN O3 8 Good 36 39 PPB
4:00 AM ASPN2 PM10 24 Good 30 32 µg/m3
4:00 AM ASPN2 PM2.5 24 Good 22 3 µg/m3
4:00 AM AURE O3 8 Good 30 32 PPB
4:00 AM BHWK O3 8 Good 36 39 PPB
4:00 AM BOU PM10 24 Good 22 24 µg/m3
4:00 AM BOU PM2.5 24 Good 31 5 µg/m3
4:00 AM BOUR O3 8 Good 24 26 PPB
4:00 AM CAN PM10 24 Good 14 15 µg/m3
4:00 AM CAN PM2.5 24 Good 21 3 µg/m3
4:00 AM CASA CO 8 Good 1 0.1 PPM
4:00 AM CASA NO2 1 Good 16 17 PPB
4:00 AM CASA O3 8 Good 24 26 PPB
4:00 AM CASA PM10 24 Good 22 24 µg/m3
4:00 AM CASA PM2.5 24 Good 31 5 µg/m3
4:00 AM CCOL PM10 24 Good 20 22 µg/m3
4:00 AM CCOL PM2.5 24 Good 27 4 µg/m3
4:00 AM CTZ O3 8 Good 21 23 PPB
4:00 AM DELT PM10 24 Good 19 21 µg/m3
4:00 AM DELT PM2.5 24 Good 23 4 µg/m3
4:00 AM DELT PM2.5 24 Good 23 4 µg/m3
4:00 AM EVG O3 8 Good 33 36 PPB
4:00 AM FOS NO2 1 Good 1 1 PPB
4:00 AM FOS O3 8 Good 38 41 PPB
4:00 AM FTC CO 8 Good 1 0.1 PPM
4:00 AM FTC O3 8 Good 40 43 PPB
4:00 AM FTCF PM10 24 Good 15 16 µg/m3
4:00 AM FTCF PM2.5 24 Good 26 4 µg/m3
4:00 AM FTCW O3 8 Good 39 42 PPB
4:00 AM GJPB PM10 24 Good 20 22 µg/m3
4:00 AM GJPB PM2.5 24 Good 28 5 µg/m3
4:00 AM GREH PM10 24 Good 11 12 µg/m3
4:00 AM GREH PM2.5 24 Good 30 5 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 31 34 PPB
4:00 AM I25DEN CO 8 Good 1 0.1 PPM
4:00 AM I25DEN NO2 1 Good 11 12 PPB
4:00 AM I25DEN PM10 24 Good 31 34 µg/m3
4:00 AM I25DEN PM2.5 24 Good 36 6 µg/m3
4:00 AM I25GLO NO2 1 Good 8 8 PPB
4:00 AM I25GLO PM10 24 Good 31 33 µg/m3
4:00 AM I25GLO PM2.5 24 Good 34 6 µg/m3
4:00 AM LAST NO2 1 Good 2 2 PPB
4:00 AM LAST O3 8 Good 29 31 PPB
4:00 AM LMB PM10 24 Good 32 35 µg/m3
4:00 AM LMB PM2.5 24 Good 31 5 µg/m3
4:00 AM LNGM PM10 24 Good 20 22 µg/m3
4:00 AM LNGM PM2.5 24 Good 35 6 µg/m3
4:00 AM MAN O3 8 Good 32 35 PPB
4:00 AM MFP O3 8 Good 33 36 PPB
4:00 AM NJH PM10 24 Good 24 26 µg/m3
4:00 AM NJH PM2.5 24 Good 31 5 µg/m3
4:00 AM NREL O3 8 Good 32 35 PPB
4:00 AM PAG PM10 24 Good 25 27 µg/m3
4:00 AM PAG PM2.5 24 Good 26 4 µg/m3
4:00 AM PAL O3 8 Good 36 39 PPB
4:00 AM PFS PM10 24 Good 20 22 µg/m3
4:00 AM PFS PM2.5 24 Good 26 4 µg/m3
4:00 AM PMS PM2.5 24 Good 43 7 µg/m3
4:00 AM PWES O3 8 Good 31 33 PPB
4:00 AM RFN O3 8 Good 30 32 PPB
4:00 AM RIFL PM2.5 24 Good 19 3 µg/m3
4:00 AM RIFLO3 O3 8 Good 33 36 PPB
4:00 AM SSMB PM10 24 Good 26 28 µg/m3
4:00 AM SSMB PM2.5 24 Good 26 4 µg/m3
4:00 AM TEL PM10 24 Good 42 45 µg/m3
4:00 AM TEL PM2.5 24 Good 29 5 µg/m3
4:00 AM TIM O3 8 Good 40 43 PPB
4:00 AM TIM PM10 24 Good 13 14 µg/m3
4:00 AM TIM PM2.5 24 Good 22 4 µg/m3
4:00 AM WBY NO2 1 Good 4 4 PPB
4:00 AM WBY NO2 1 Good 4 4 PPB
4:00 AM WBY O3 8 Good 28 30 PPB
4:00 AM WBY PM10 24 Good 28 30 µg/m3
4:00 AM WBY PM2.5 24 Good 31 5 µg/m3
3:00 AM ACAD O3 8 Good 31 33 PPB
3:00 AM ACC PM10 24 Good 30 32 µg/m3
3:00 AM ACC PM2.5 24 Good 49 8 µg/m3
3:00 AM ADB PM10 24 Good 49 53 µg/m3
3:00 AM ADB PM2.5 24 Good 42 7 µg/m3
3:00 AM ALA PM10 24 Good 19 21 µg/m3
3:00 AM ALA PM2.5 24 Good 29 5 µg/m3
3:00 AM ASPN O3 8 Good 36 39 PPB
3:00 AM ASPN2 PM10 24 Good 30 32 µg/m3
3:00 AM ASPN2 PM2.5 24 Good 22 3 µg/m3
3:00 AM AURE O3 8 Good 30 32 PPB
3:00 AM BHWK O3 8 Good 34 37 PPB
3:00 AM BOU PM10 24 Good 21 23 µg/m3
3:00 AM BOU PM2.5 24 Good 31 5 µg/m3
3:00 AM BOUR O3 8 Good 25 27 PPB
3:00 AM CAN PM10 24 Good 14 15 µg/m3
3:00 AM CAN PM2.5 24 Good 21 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 25 27 PPB
3:00 AM CASA PM10 24 Good 22 24 µg/m3
3:00 AM CASA PM2.5 24 Good 30 5 µg/m3
3:00 AM CCOL PM10 24 Good 20 22 µg/m3
3:00 AM CCOL PM2.5 24 Good 26 4 µg/m3
3:00 AM CTZ O3 8 Good 23 25 PPB
3:00 AM DELT PM10 24 Good 20 22 µg/m3
3:00 AM DELT PM2.5 24 Good 23 4 µg/m3
3:00 AM DELT PM2.5 24 Good 23 4 µg/m3
3:00 AM EVG O3 8 Good 31 34 PPB
3:00 AM FOS O3 8 Good 36 39 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 16 17 µg/m3
3:00 AM FTCF PM2.5 24 Good 26 4 µg/m3
3:00 AM FTCW O3 8 Good 38 41 PPB
3:00 AM GJPB PM10 24 Good 20 22 µg/m3
3:00 AM GJPB PM2.5 24 Good 29 5 µg/m3
3:00 AM GREH PM10 24 Good 12 13 µg/m3
3:00 AM GREH PM2.5 24 Good 31 5 µg/m3
3:00 AM GRET CO 8 Good 1 0.1 PPM
3:00 AM GRET O3 8 Good 32 35 PPB
3:00 AM HLD O3 8 Good 32 35 PPB
3:00 AM I25DEN CO 8 Good 1 0.1 PPM
3:00 AM I25DEN NO2 1 Good 11 12 PPB
3:00 AM I25DEN PM10 24 Good 31 34 µg/m3
3:00 AM I25DEN PM2.5 24 Good 36 6 µg/m3
3:00 AM I25GLO NO2 1 Good 7 7 PPB
3:00 AM I25GLO PM10 24 Good 31 33 µg/m3
3:00 AM I25GLO PM2.5 24 Good 33 6 µg/m3
3:00 AM LAST NO2 1 Good 2 2 PPB
3:00 AM LAST O3 8 Good 28 30 PPB
3:00 AM LMB PM10 24 Good 32 35 µg/m3
3:00 AM LMB PM2.5 24 Good 31 5 µg/m3
3:00 AM LNGM PM10 24 Good 20 22 µg/m3
3:00 AM LNGM PM2.5 24 Good 34 6 µg/m3
3:00 AM MAN O3 8 Good 33 36 PPB
3:00 AM MFP NO2 1 Good 1 1 PPB
3:00 AM MFP O3 8 Good 31 34 PPB
3:00 AM NJH PM10 24 Good 24 26 µg/m3
3:00 AM NJH PM2.5 24 Good 29 5 µg/m3
3:00 AM NREL O3 8 Good 30 32 PPB
3:00 AM PAG PM10 24 Good 25 27 µg/m3
3:00 AM PAG PM2.5 24 Good 26 4 µg/m3
3:00 AM PAL O3 8 Good 37 40 PPB
3:00 AM PFS PM10 24 Good 19 21 µg/m3
3:00 AM PFS PM2.5 24 Good 25 4 µg/m3
3:00 AM PMS PM2.5 24 Good 43 7 µg/m3
3:00 AM PWES O3 8 Good 32 35 PPB
3:00 AM RFN NO2 1 Good 1 1 PPB
3:00 AM RFN O3 8 Good 29 31 PPB
3:00 AM RIFL PM2.5 24 Good 20 3 µg/m3
3:00 AM RIFLO3 O3 8 Good 32 35 PPB
3:00 AM SSMB PM10 24 Good 26 28 µg/m3
3:00 AM SSMB PM2.5 24 Good 26 4 µg/m3
3:00 AM TEL PM10 24 Good 42 45 µg/m3
3:00 AM TEL PM2.5 24 Good 29 5 µg/m3
3:00 AM TIM O3 8 Good 37 40 PPB
3:00 AM TIM PM10 24 Good 13 14 µg/m3
3:00 AM TIM PM2.5 24 Good 22 4 µg/m3
3:00 AM WBY NO2 1 Good 4 4 PPB
3:00 AM WBY NO2 1 Good 4 4 PPB
3:00 AM WBY O3 8 Good 29 31 PPB
3:00 AM WBY PM10 24 Good 28 30 µg/m3
3:00 AM WBY PM2.5 24 Good 31 5 µg/m3
2:00 AM ACAD O3 8 Good 32 35 PPB
2:00 AM ACC PM10 24 Good 30 32 µg/m3
2:00 AM ACC PM2.5 24 Good 47 8 µg/m3
2:00 AM ADB PM10 24 Good 49 53 µg/m3
2:00 AM ADB PM2.5 24 Good 41 7 µg/m3
2:00 AM ALA PM10 24 Good 19 21 µg/m3
2:00 AM ALA PM2.5 24 Good 28 5 µg/m3
2:00 AM ASPN O3 8 Good 36 39 PPB
2:00 AM ASPN2 PM10 24 Good 30 32 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 22 4 µg/m3
2:00 AM AURE O3 8 Good 31 33 PPB
2:00 AM BHWK O3 8 Good 33 36 PPB
2:00 AM BOU PM10 24 Good 21 23 µg/m3
2:00 AM BOU PM2.5 24 Good 29 5 µg/m3
2:00 AM BOUR O3 8 Good 25 27 PPB
2:00 AM CAN PM10 24 Good 14 15 µg/m3
2:00 AM CAN PM2.5 24 Good 20 3 µg/m3
2:00 AM CASA CO 8 Good 1 0.1 PPM
2:00 AM CASA NO2 1 Good 9 10 PPB
2:00 AM CASA O3 8 Good 26 28 PPB
2:00 AM CASA PM10 24 Good 21 23 µg/m3
2:00 AM CASA PM2.5 24 Good 29 5 µg/m3
2:00 AM CCOL PM10 24 Good 19 21 µg/m3
2:00 AM CCOL PM2.5 24 Good 26 4 µg/m3
2:00 AM CTZ O3 8 Good 27 29 PPB
2:00 AM DELT PM10 24 Good 19 21 µg/m3
2:00 AM DELT PM2.5 24 Good 24 4 µg/m3
2:00 AM DELT PM2.5 24 Good 24 4 µg/m3
2:00 AM EVG O3 8 Good 31 34 PPB
2:00 AM FOS NO2 1 Good 1 1 PPB
2:00 AM FOS O3 8 Good 33 36 PPB
2:00 AM FTC CO 8 Good 1 0.1 PPM
2:00 AM FTC O3 8 Good 35 38 PPB
2:00 AM FTCF PM10 24 Good 16 17 µg/m3
2:00 AM FTCF PM2.5 24 Good 26 4 µg/m3
2:00 AM FTCW O3 8 Good 35 38 PPB
2:00 AM GJPB PM10 24 Good 21 23 µg/m3
2:00 AM GJPB PM2.5 24 Good 30 5 µg/m3
2:00 AM GREH PM10 24 Good 12 13 µg/m3
2:00 AM GREH PM2.5 24 Good 31 5 µg/m3
2:00 AM GRET CO 8 Good 1 0.1 PPM
2:00 AM GRET O3 8 Good 31 33 PPB
2:00 AM HLD O3 8 Good 32 35 PPB
2:00 AM I25DEN CO 8 Good 1 0.1 PPM
2:00 AM I25DEN NO2 1 Good 8 9 PPB
2:00 AM I25DEN PM10 24 Good 31 34 µg/m3
2:00 AM I25DEN PM2.5 24 Good 34 6 µg/m3
2:00 AM I25GLO NO2 1 Good 10 11 PPB
2:00 AM I25GLO PM10 24 Good 31 34 µg/m3
2:00 AM I25GLO PM2.5 24 Good 33 5 µg/m3
2:00 AM LAST NO2 1 Good 3 3 PPB
2:00 AM LAST O3 8 Good 26 28 PPB
2:00 AM LMB PM10 24 Good 31 34 µg/m3
2:00 AM LMB PM2.5 24 Good 30 5 µg/m3
2:00 AM LNGM PM10 24 Good 20 22 µg/m3
2:00 AM LNGM PM2.5 24 Good 33 6 µg/m3
2:00 AM MAN O3 8 Good 34 37 PPB
2:00 AM MFP NO2 1 Good 1 1 PPB
2:00 AM MFP O3 8 Good 31 33 PPB
2:00 AM NJH PM10 24 Good 23 25 µg/m3
2:00 AM NJH PM2.5 24 Good 28 5 µg/m3
2:00 AM NREL O3 8 Good 30 32 PPB
2:00 AM PAG PM10 24 Good 25 27 µg/m3
2:00 AM PAG PM2.5 24 Good 26 4 µg/m3
2:00 AM PAL O3 8 Good 37 40 PPB
2:00 AM PFS PM10 24 Good 19 21 µg/m3
2:00 AM PFS PM2.5 24 Good 24 4 µg/m3
2:00 AM PMS PM2.5 24 Good 43 7 µg/m3
2:00 AM PWES O3 8 Good 34 37 PPB
2:00 AM RFN NO2 1 Good 1 1 PPB
2:00 AM RFN O3 8 Good 29 31 PPB
2:00 AM RIFL PM2.5 24 Good 20 3 µg/m3
2:00 AM RIFLO3 O3 8 Good 33 36 PPB
2:00 AM SSMB PM10 24 Good 26 28 µg/m3
2:00 AM SSMB PM2.5 24 Good 26 4 µg/m3
2:00 AM TEL PM10 24 Good 42 45 µg/m3
2:00 AM TEL PM2.5 24 Good 29 5 µg/m3
2:00 AM TIM O3 8 Good 35 38 PPB
2:00 AM TIM PM10 24 Good 13 14 µg/m3
2:00 AM TIM PM2.5 24 Good 22 4 µg/m3
2:00 AM WBY NO2 1 Good 3 3 PPB
2:00 AM WBY NO2 1 Good 3 3 PPB
2:00 AM WBY O3 8 Good 30 32 PPB
2:00 AM WBY PM10 24 Good 28 30 µg/m3
2:00 AM WBY PM2.5 24 Good 29 5 µg/m3
1:00 AM ACAD O3 8 Good 33 36 PPB
1:00 AM ACC PM10 24 Good 30 32 µg/m3
1:00 AM ACC PM2.5 24 Good 46 8 µg/m3
1:00 AM ADB PM10 24 Good 49 53 µg/m3
1:00 AM ADB PM2.5 24 Good 39 7 µg/m3
1:00 AM ALA PM10 24 Good 19 21 µg/m3
1:00 AM ALA PM2.5 24 Good 27 4 µg/m3
1:00 AM ASPN O3 8 Good 37 40 PPB
1:00 AM ASPN2 PM10 24 Good 30 32 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 22 4 µg/m3
1:00 AM AURE O3 8 Good 31 34 PPB
1:00 AM BHWK O3 8 Good 33 36 PPB
1:00 AM BOU PM10 24 Good 21 23 µg/m3
1:00 AM BOU PM2.5 24 Good 28 5 µg/m3
1:00 AM BOUR O3 8 Good 26 28 PPB
1:00 AM CAN PM10 24 Good 14 15 µg/m3
1:00 AM CAN PM2.5 24 Good 19 3 µg/m3
1:00 AM CASA CO 8 Good 1 0.1 PPM
1:00 AM CASA NO2 1 Good 9 10 PPB
1:00 AM CASA O3 8 Good 27 29 PPB
1:00 AM CASA PM10 24 Good 21 23 µg/m3
1:00 AM CASA PM2.5 24 Good 28 5 µg/m3
1:00 AM CCOL PM10 24 Good 19 21 µg/m3
1:00 AM CCOL PM2.5 24 Good 24 4 µg/m3
1:00 AM CTZ O3 8 Good 31 33 PPB
1:00 AM DELT PM10 24 Good 19 21 µg/m3
1:00 AM DELT PM2.5 24 Good 24 4 µg/m3
1:00 AM DELT PM2.5 24 Good 24 4 µg/m3
1:00 AM EVG O3 8 Good 34 37 PPB
1:00 AM FOS NO2 1 Good 1 1 PPB
1:00 AM FOS O3 8 Good 31 33 PPB
1:00 AM FTC CO 8 Good 1 0.1 PPM
1:00 AM FTC O3 8 Good 32 35 PPB
1:00 AM FTCF PM10 24 Good 16 17 µg/m3
1:00 AM FTCF PM2.5 24 Good 26 4 µg/m3
1:00 AM FTCW O3 8 Good 33 36 PPB
1:00 AM GJPB PM10 24 Good 21 23 µg/m3
1:00 AM GJPB PM2.5 24 Good 31 5 µg/m3
1:00 AM GREH PM10 24 Good 12 13 µg/m3
1:00 AM GREH PM2.5 24 Good 31 5 µg/m3
1:00 AM GRET CO 8 Good 1 0.1 PPM
1:00 AM GRET O3 8 Good 30 32 PPB
1:00 AM HLD O3 8 Good 33 36 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 31 33 µg/m3
1:00 AM I25DEN PM2.5 24 Good 33 5 µg/m3
1:00 AM I25GLO NO2 1 Good 5 5 PPB
1:00 AM I25GLO PM10 24 Good 31 33 µg/m3
1:00 AM I25GLO PM2.5 24 Good 32 5 µg/m3
1:00 AM LAST NO2 1 Good 3 3 PPB
1:00 AM LAST O3 8 Good 27 29 PPB
1:00 AM LMB PM10 24 Good 31 34 µg/m3
1:00 AM LMB PM2.5 24 Good 29 5 µg/m3
1:00 AM LNGM PM10 24 Good 20 22 µg/m3
1:00 AM LNGM PM2.5 24 Good 32 5 µg/m3
1:00 AM MAN O3 8 Good 35 38 PPB
1:00 AM MFP NO2 1 Good 2 2 PPB
1:00 AM MFP O3 8 Good 31 33 PPB
1:00 AM NJH PM10 24 Good 23 25 µg/m3
1:00 AM NJH PM2.5 24 Good 27 4 µg/m3
1:00 AM NREL O3 8 Good 30 32 PPB
1:00 AM PAG PM10 24 Good 25 27 µg/m3
1:00 AM PAG PM2.5 24 Good 26 4 µg/m3
1:00 AM PAL O3 8 Good 38 41 PPB
1:00 AM PFS PM10 24 Good 19 21 µg/m3
1:00 AM PFS PM2.5 24 Good 23 4 µg/m3
1:00 AM PMS PM2.5 24 Good 42 7 µg/m3
1:00 AM PWES O3 8 Good 36 39 PPB
1:00 AM RFN NO2 1 Good 1 1 PPB
1:00 AM RFN O3 8 Good 29 31 PPB
1:00 AM RIFL PM2.5 24 Good 20 3 µg/m3
1:00 AM RIFLO3 O3 8 Good 33 36 PPB
1:00 AM SSMB PM10 24 Good 26 28 µg/m3
1:00 AM SSMB PM2.5 24 Good 26 4 µg/m3
1:00 AM TEL PM10 24 Good 42 45 µg/m3
1:00 AM TEL PM2.5 24 Good 29 5 µg/m3
1:00 AM TIM NO2 1 Good 2 2 PPB
1:00 AM TIM O3 8 Good 32 35 PPB
1:00 AM TIM PM10 24 Good 13 14 µg/m3
1:00 AM TIM PM2.5 24 Good 22 4 µg/m3
1:00 AM WBY NO2 1 Good 3 3 PPB
1:00 AM WBY NO2 1 Good 3 3 PPB
1:00 AM WBY O3 8 Good 30 32 PPB
1:00 AM WBY PM10 24 Good 27 29 µg/m3
1:00 AM WBY PM2.5 24 Good 28 5 µg/m3

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