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AQI Calculations on 03/04/2026 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 ACC PM10 24 Good 8 9 µg/m3
4:00 AM ACC PM2.5 24 Good 21 3 µg/m3
4:00 AM ADB PM10 24 Good 19 21 µg/m3
4:00 AM ADB PM2.5 24 Good 28 5 µg/m3
4:00 AM ALA PM10 24 Good 14 15 µg/m3
4:00 AM ALA PM2.5 24 Good 18 3 µg/m3
4:00 AM ASPN O3 8 Good 30 32 PPB
4:00 AM ASPN2 PM10 24 Good 17 18 µg/m3
4:00 AM ASPN2 PM2.5 24 Good 17 3 µg/m3
4:00 AM BHWK O3 8 Good 33 36 PPB
4:00 AM BOU PM10 24 Good 7 8 µg/m3
4:00 AM BOU PM2.5 24 Good 15 2 µg/m3
4:00 AM BOUR O3 8 Good 20 22 PPB
4:00 AM CAMP NO2 1 Good 5 5 PPB
4:00 AM CAMP NO2 1 Good 5 5 PPB
4:00 AM CAMP O3 8 Good 29 31 PPB
4:00 AM CAMP PM10 24 Good 7 8 µg/m3
4:00 AM CAMP PM2.5 24 Good 23 4 µg/m3
4:00 AM CAN PM10 24 Good 15 16 µg/m3
4:00 AM CAN PM2.5 24 Good 17 3 µg/m3
4:00 AM CASA CO 8 Good 1 0.1 PPM
4:00 AM CASA NO2 1 Good 14 15 PPB
4:00 AM CASA O3 8 Good 21 23 PPB
4:00 AM CASA PM10 24 Good 11 12 µg/m3
4:00 AM CASA PM2.5 24 Good 22 3 µg/m3
4:00 AM CCOL PM10 24 Good 14 15 µg/m3
4:00 AM CCOL PM2.5 24 Good 27 4 µg/m3
4:00 AM CHAT O3 8 Good 27 29 PPB
4:00 AM CHAT PM10 24 Good 13 14 µg/m3
4:00 AM CHAT PM2.5 24 Good 24 4 µg/m3
4:00 AM DELT PM10 24 Good 14 15 µg/m3
4:00 AM DELT PM2.5 24 Good 14 2 µg/m3
4:00 AM DELT PM2.5 24 Good 14 2 µg/m3
4:00 AM FOS NO2 1 Good 10 11 PPB
4:00 AM FOS O3 8 Good 16 17 PPB
4:00 AM GREH PM10 24 Good 2 2 µg/m3
4:00 AM I25DEN CO 8 Good 2 0.2 PPM
4:00 AM I25DEN NO2 1 Good 19 20 PPB
4:00 AM I25DEN PM10 24 Good 17 18 µg/m3
4:00 AM I25DEN PM2.5 24 Good 27 4 µg/m3
4:00 AM I25GLO NO2 1 Good 18 19 PPB
4:00 AM I25GLO PM10 24 Good 22 24 µg/m3
4:00 AM I25GLO PM2.5 24 Good 27 4 µg/m3
4:00 AM LAST NO2 1 Good 6 6 PPB
4:00 AM LAST O3 8 Good 25 27 PPB
4:00 AM LMB PM10 24 Good 19 20 µg/m3
4:00 AM LMB PM2.5 24 Good 38 6 µg/m3
4:00 AM LNGM PM10 24 Good 12 13 µg/m3
4:00 AM LNGM PM2.5 24 Good 23 4 µg/m3
4:00 AM NJH PM10 24 Good 12 13 µg/m3
4:00 AM NJH PM2.5 24 Good 24 4 µg/m3
4:00 AM PAG PM10 24 Good 24 26 µg/m3
4:00 AM PAG PM2.5 24 Good 19 3 µg/m3
4:00 AM PFS PM10 24 Good 19 21 µg/m3
4:00 AM PFS PM2.5 24 Good 29 5 µg/m3
4:00 AM PMS PM2.5 24 Good 31 5 µg/m3
4:00 AM RIFLO3 O3 8 Good 6 6 PPB
4:00 AM SSMB PM10 24 Good 9 10 µg/m3
4:00 AM SSMB PM2.5 24 Good 14 2 µg/m3
4:00 AM TEL PM10 24 Good 31 33 µg/m3
4:00 AM TEL PM2.5 24 Good 18 3 µg/m3
4:00 AM WBY NO2 1 Good 25 26 PPB
4:00 AM WBY NO2 1 Good 25 26 PPB
4:00 AM WBY O3 8 Good 15 16 PPB
4:00 AM WBY PM10 24 Good 15 16 µg/m3
4:00 AM WBY PM2.5 24 Good 24 4 µg/m3
3:00 AM ACC PM10 24 Good 8 9 µg/m3
3:00 AM ACC PM2.5 24 Good 22 3 µg/m3
3:00 AM ADB PM10 24 Good 20 22 µg/m3
3:00 AM ADB PM2.5 24 Good 27 4 µg/m3
3:00 AM ALA PM10 24 Good 14 15 µg/m3
3:00 AM ALA PM2.5 24 Good 18 3 µg/m3
3:00 AM ASPN O3 8 Good 30 32 PPB
3:00 AM ASPN2 PM10 24 Good 17 18 µg/m3
3:00 AM ASPN2 PM2.5 24 Good 18 3 µg/m3
3:00 AM BHWK O3 8 Good 33 36 PPB
3:00 AM BOU PM10 24 Good 8 9 µg/m3
3:00 AM BOU PM2.5 24 Good 16 2 µg/m3
3:00 AM BOUR O3 8 Good 22 24 PPB
3:00 AM CAMP NO2 1 Good 5 5 PPB
3:00 AM CAMP NO2 1 Good 5 5 PPB
3:00 AM CAMP O3 8 Good 29 31 PPB
3:00 AM CAMP PM10 24 Good 7 8 µg/m3
3:00 AM CAMP PM2.5 24 Good 23 4 µg/m3
3:00 AM CAN PM10 24 Good 15 16 µg/m3
3:00 AM CAN PM2.5 24 Good 18 3 µg/m3
3:00 AM CASA CO 8 Good 1 0.1 PPM
3:00 AM CASA NO2 1 Good 11 12 PPB
3:00 AM CASA O3 8 Good 24 26 PPB
3:00 AM CASA PM10 24 Good 11 12 µg/m3
3:00 AM CASA PM2.5 24 Good 21 3 µg/m3
3:00 AM CCOL PM10 24 Good 15 16 µg/m3
3:00 AM CCOL PM2.5 24 Good 27 4 µg/m3
3:00 AM CHAT O3 8 Good 28 30 PPB
3:00 AM CHAT PM10 24 Good 13 14 µg/m3
3:00 AM CHAT PM2.5 24 Good 25 4 µg/m3
3:00 AM DELT PM10 24 Good 13 14 µg/m3
3:00 AM DELT PM2.5 24 Good 14 2 µg/m3
3:00 AM DELT PM2.5 24 Good 14 2 µg/m3
3:00 AM FOS NO2 1 Good 13 14 PPB
3:00 AM FOS O3 8 Good 19 20 PPB
3:00 AM GREH PM10 24 Good 2 2 µg/m3
3:00 AM I25DEN CO 8 Good 3 0.3 PPM
3:00 AM I25DEN NO2 1 Good 18 19 PPB
3:00 AM I25DEN PM10 24 Good 18 19 µg/m3
3:00 AM I25DEN PM2.5 24 Good 27 4 µg/m3
3:00 AM I25GLO NO2 1 Good 20 21 PPB
3:00 AM I25GLO PM10 24 Good 23 25 µg/m3
3:00 AM I25GLO PM2.5 24 Good 27 4 µg/m3
3:00 AM LAST NO2 1 Good 5 5 PPB
3:00 AM LAST O3 8 Good 26 28 PPB
3:00 AM LMB PM10 24 Good 19 21 µg/m3
3:00 AM LMB PM2.5 24 Good 41 7 µg/m3
3:00 AM LNGM PM10 24 Good 12 13 µg/m3
3:00 AM LNGM PM2.5 24 Good 23 4 µg/m3
3:00 AM NJH PM10 24 Good 12 13 µg/m3
3:00 AM NJH PM2.5 24 Good 24 4 µg/m3
3:00 AM PAG PM10 24 Good 24 26 µg/m3
3:00 AM PAG PM2.5 24 Good 21 3 µg/m3
3:00 AM PFS PM10 24 Good 21 23 µg/m3
3:00 AM PFS PM2.5 24 Good 31 5 µg/m3
3:00 AM PMS PM2.5 24 Good 31 5 µg/m3
3:00 AM RIFLO3 O3 8 Good 7 8 PPB
3:00 AM SSMB PM10 24 Good 9 10 µg/m3
3:00 AM SSMB PM2.5 24 Good 13 2 µg/m3
3:00 AM TEL PM10 24 Good 31 34 µg/m3
3:00 AM TEL PM2.5 24 Good 18 3 µg/m3
3:00 AM WBY NO2 1 Good 21 22 PPB
3:00 AM WBY NO2 1 Good 21 22 PPB
3:00 AM WBY O3 8 Good 19 20 PPB
3:00 AM WBY PM10 24 Good 15 16 µg/m3
3:00 AM WBY PM2.5 24 Good 23 4 µg/m3
2:00 AM ACC PM10 24 Good 9 10 µg/m3
2:00 AM ACC PM2.5 24 Good 23 4 µg/m3
2:00 AM ADB PM10 24 Good 20 22 µg/m3
2:00 AM ADB PM2.5 24 Good 27 4 µg/m3
2:00 AM ALA PM10 24 Good 14 15 µg/m3
2:00 AM ALA PM2.5 24 Good 18 3 µg/m3
2:00 AM ASPN O3 8 Good 29 31 PPB
2:00 AM ASPN2 PM10 24 Good 17 18 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 18 3 µg/m3
2:00 AM BHWK O3 8 Good 33 36 PPB
2:00 AM BOU PM10 24 Good 8 9 µg/m3
2:00 AM BOU PM2.5 24 Good 16 2 µg/m3
2:00 AM BOUR O3 8 Good 24 26 PPB
2:00 AM CAMP NO2 1 Good 5 5 PPB
2:00 AM CAMP NO2 1 Good 5 5 PPB
2:00 AM CAMP O3 8 Good 29 31 PPB
2:00 AM CAMP PM10 24 Good 8 9 µg/m3
2:00 AM CAMP PM2.5 24 Good 23 4 µg/m3
2:00 AM CAN PM10 24 Good 16 17 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 7 7 PPB
2:00 AM CASA O3 8 Good 25 27 PPB
2:00 AM CASA PM10 24 Good 11 12 µg/m3
2:00 AM CASA PM2.5 24 Good 21 3 µg/m3
2:00 AM CCOL PM10 24 Good 16 17 µg/m3
2:00 AM CCOL PM2.5 24 Good 26 4 µg/m3
2:00 AM CHAT O3 8 Good 28 30 PPB
2:00 AM CHAT PM10 24 Good 14 15 µg/m3
2:00 AM CHAT PM2.5 24 Good 26 4 µg/m3
2:00 AM DELT PM10 24 Good 13 14 µg/m3
2:00 AM DELT PM2.5 24 Good 14 2 µg/m3
2:00 AM DELT PM2.5 24 Good 14 2 µg/m3
2:00 AM FOS NO2 1 Good 15 16 PPB
2:00 AM FOS O3 8 Good 22 24 PPB
2:00 AM GREH PM10 24 Good 2 2 µg/m3
2:00 AM I25DEN CO 8 Good 3 0.3 PPM
2:00 AM I25DEN NO2 1 Good 12 13 PPB
2:00 AM I25DEN PM10 24 Good 19 20 µg/m3
2:00 AM I25DEN PM2.5 24 Good 27 4 µg/m3
2:00 AM I25GLO NO2 1 Good 17 18 PPB
2:00 AM I25GLO PM10 24 Good 23 25 µg/m3
2:00 AM I25GLO PM2.5 24 Good 27 4 µg/m3
2:00 AM LAST NO2 1 Good 6 6 PPB
2:00 AM LAST O3 8 Good 28 30 PPB
2:00 AM LMB PM10 24 Good 20 22 µg/m3
2:00 AM LMB PM2.5 24 Good 44 7 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 NJH PM10 24 Good 13 14 µg/m3
2:00 AM NJH PM2.5 24 Good 24 4 µg/m3
2:00 AM PAG PM10 24 Good 24 26 µg/m3
2:00 AM PAG PM2.5 24 Good 21 3 µg/m3
2:00 AM PFS PM10 24 Good 22 24 µg/m3
2:00 AM PFS PM2.5 24 Good 32 5 µg/m3
2:00 AM PMS PM2.5 24 Good 31 5 µg/m3
2:00 AM RIFLO3 O3 8 Good 10 11 PPB
2:00 AM SSMB PM10 24 Good 9 10 µg/m3
2:00 AM SSMB PM2.5 24 Good 13 2 µg/m3
2:00 AM TEL PM10 24 Good 31 34 µg/m3
2:00 AM TEL PM2.5 24 Good 19 3 µg/m3
2:00 AM WBY NO2 1 Good 25 26 PPB
2:00 AM WBY NO2 1 Good 25 26 PPB
2:00 AM WBY O3 8 Good 21 23 PPB
2:00 AM WBY PM10 24 Good 16 17 µg/m3
2:00 AM WBY PM2.5 24 Good 23 4 µg/m3
1:00 AM ACC PM10 24 Good 10 11 µg/m3
1:00 AM ACC PM2.5 24 Good 24 4 µg/m3
1:00 AM ADB PM10 24 Good 21 23 µg/m3
1:00 AM ADB PM2.5 24 Good 27 4 µg/m3
1:00 AM ALA PM10 24 Good 14 15 µg/m3
1:00 AM ALA PM2.5 24 Good 19 3 µg/m3
1:00 AM ASPN O3 8 Good 31 33 PPB
1:00 AM ASPN2 PM10 24 Good 17 18 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 18 3 µg/m3
1:00 AM BHWK O3 8 Good 35 38 PPB
1:00 AM BOU PM10 24 Good 9 10 µg/m3
1:00 AM BOU PM2.5 24 Good 16 2 µg/m3
1:00 AM BOUR O3 8 Good 27 29 PPB
1:00 AM CAMP NO2 1 Good 7 7 PPB
1:00 AM CAMP NO2 1 Good 7 7 PPB
1:00 AM CAMP O3 8 Good 29 31 PPB
1:00 AM CAMP PM10 24 Good 9 10 µg/m3
1:00 AM CAMP PM2.5 24 Good 24 4 µg/m3
1:00 AM CAN PM10 24 Good 16 17 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 13 14 PPB
1:00 AM CASA O3 8 Good 26 28 PPB
1:00 AM CASA PM10 24 Good 12 13 µg/m3
1:00 AM CASA PM2.5 24 Good 21 3 µg/m3
1:00 AM CCOL PM10 24 Good 17 18 µg/m3
1:00 AM CCOL PM2.5 24 Good 26 4 µg/m3
1:00 AM CHAT O3 8 Good 30 32 PPB
1:00 AM CHAT PM10 24 Good 15 16 µg/m3
1:00 AM CHAT PM2.5 24 Good 27 4 µg/m3
1:00 AM DELT PM10 24 Good 13 14 µg/m3
1:00 AM DELT PM2.5 24 Good 14 2 µg/m3
1:00 AM DELT PM2.5 24 Good 14 2 µg/m3
1:00 AM FOS NO2 1 Good 10 11 PPB
1:00 AM FOS O3 8 Good 27 29 PPB
1:00 AM GREH PM10 24 Good 2 2 µg/m3
1:00 AM I25DEN CO 8 Good 3 0.3 PPM
1:00 AM I25DEN NO2 1 Good 13 14 PPB
1:00 AM I25DEN PM10 24 Good 19 21 µg/m3
1:00 AM I25DEN PM2.5 24 Good 27 4 µg/m3
1:00 AM I25GLO NO2 1 Good 18 19 PPB
1:00 AM I25GLO PM10 24 Good 24 26 µg/m3
1:00 AM I25GLO PM2.5 24 Good 27 4 µg/m3
1:00 AM LAST NO2 1 Good 6 6 PPB
1:00 AM LAST O3 8 Good 30 32 PPB
1:00 AM LMB PM10 24 Good 21 23 µg/m3
1:00 AM LMB PM2.5 24 Good 47 8 µg/m3
1:00 AM LNGM PM10 24 Good 12 13 µg/m3
1:00 AM LNGM PM2.5 24 Good 22 4 µg/m3
1:00 AM NJH PM10 24 Good 14 15 µg/m3
1:00 AM NJH PM2.5 24 Good 25 4 µg/m3
1:00 AM PAG PM10 24 Good 25 27 µg/m3
1:00 AM PAG PM2.5 24 Good 22 3 µg/m3
1:00 AM PFS PM10 24 Good 23 25 µg/m3
1:00 AM PFS PM2.5 24 Good 33 5 µg/m3
1:00 AM PMS PM2.5 24 Good 31 5 µg/m3
1:00 AM RIFLO3 O3 8 Good 14 15 PPB
1:00 AM SSMB PM10 24 Good 10 11 µg/m3
1:00 AM SSMB PM2.5 24 Good 13 2 µg/m3
1:00 AM TEL PM10 24 Good 32 35 µg/m3
1:00 AM TEL PM2.5 24 Good 19 3 µg/m3
1:00 AM WBY NO2 1 Good 24 25 PPB
1:00 AM WBY NO2 1 Good 24 25 PPB
1:00 AM WBY O3 8 Good 25 27 PPB
1:00 AM WBY PM10 24 Good 16 17 µg/m3
1:00 AM WBY PM2.5 24 Good 23 4 µg/m3

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