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AQI Calculations on 01/21/2025 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 6 6 PPB
3:00 AM ACC PM10 24 Good 9 10 µg/m3
3:00 AM ACC PM2.5 24 Good 30 5 µg/m3
3:00 AM ADB PM10 24 Good 11 12 µg/m3
3:00 AM ADB PM2.5 24 Good 33 6 µg/m3
3:00 AM ALA PM10 24 Good 8 9 µg/m3
3:00 AM ALA PM2.5 24 Good 14 3 µg/m3
3:00 AM ASPN O3 8 Good 38 41 PPB
3:00 AM ASPN2 PM10 24 Good 4 4 µg/m3
3:00 AM ASPN2 PM2.5 24 Good 13 2 µg/m3
3:00 AM AURE O3 8 Good 40 43 PPB
3:00 AM BHWK O3 8 Good 45 49 PPB
3:00 AM BOU PM10 24 Good 8 9 µg/m3
3:00 AM BOU PM2.5 24 Good 28 5 µg/m3
3:00 AM BOUR O3 8 Good 24 26 PPB
3:00 AM CAMP NO2 1 Good 13 14 PPB
3:00 AM CAMP NO2 1 Good 13 14 PPB
3:00 AM CAMP O3 8 Good 23 25 PPB
3:00 AM CAMP PM10 24 Good 12 13 µg/m3
3:00 AM CAMP PM2.5 24 Good 38 7 µg/m3
3:00 AM CAN PM10 24 Good 7 8 µg/m3
3:00 AM CAN PM2.5 24 Good 28 5 µg/m3
3:00 AM CASA CO 8 Good 2 0.2 PPM
3:00 AM CASA NO2 1 Good 17 18 PPB
3:00 AM CASA O3 8 Good 19 20 PPB
3:00 AM CASA PM10 24 Good 8 9 µg/m3
3:00 AM CASA PM2.5 24 Good 26 5 µg/m3
3:00 AM CCOL CO 8 Good 2 0.2 PPM
3:00 AM CCOL PM10 24 Good 9 10 µg/m3
3:00 AM CCOL PM2.5 24 Good 21 4 µg/m3
3:00 AM CHAT O3 8 Good 31 33 PPB
3:00 AM CHAT PM10 24 Good 6 7 µg/m3
3:00 AM CHAT PM2.5 24 Good 24 4 µg/m3
3:00 AM CTZ O3 8 Good 31 33 PPB
3:00 AM EVG O3 8 Good 42 45 PPB
3:00 AM FOS NO2 1 Good 32 34 PPB
3:00 AM FOS O3 8 Good 12 13 PPB
3:00 AM FTC CO 8 Good 2 0.2 PPM
3:00 AM FTC O3 8 Good 20 22 PPB
3:00 AM FTCF PM10 24 Good 7 8 µg/m3
3:00 AM FTCF PM2.5 24 Good 37 7 µg/m3
3:00 AM FTCW O3 8 Good 31 33 PPB
3:00 AM GJPB PM10 24 Good 6 6 µg/m3
3:00 AM GJPB PM2.5 24 Good 21 4 µg/m3
3:00 AM GREH PM10 24 Good 7 8 µg/m3
3:00 AM GREH PM2.5 24 Good 33 6 µg/m3
3:00 AM GRET CO 8 Good 3 0.3 PPM
3:00 AM GRET O3 8 Good 10 11 PPB
3:00 AM HLD O3 8 Good 31 34 PPB
3:00 AM I25DEN CO 8 Good 3 0.3 PPM
3:00 AM I25DEN NO2 1 Good 19 20 PPB
3:00 AM I25DEN PM10 24 Good 6 7 µg/m3
3:00 AM I25DEN PM2.5 24 Good 31 6 µg/m3
3:00 AM I25GLO NO2 1 Good 21 22 PPB
3:00 AM I25GLO PM10 24 Good 8 9 µg/m3
3:00 AM I25GLO PM2.5 24 Good 37 7 µg/m3
3:00 AM LAST NO2 1 Good 33 35 PPB
3:00 AM LAST O3 8 Good 20 22 PPB
3:00 AM LMB PM10 24 Good 7 8 µg/m3
3:00 AM LMB PM2.5 24 Good 14 3 µg/m3
3:00 AM LNGM PM10 24 Good 12 13 µg/m3
3:00 AM LNGM PM2.5 24 Good 47 9 µg/m3
3:00 AM MAN O3 8 Good 31 33 PPB
3:00 AM NJH PM10 24 Good 8 9 µg/m3
3:00 AM NJH PM2.5 24 Good 29 5 µg/m3
3:00 AM NREL O3 8 Good 41 44 PPB
3:00 AM PAG PM10 24 Good 7 8 µg/m3
3:00 AM PAG PM2.5 24 Good 15 3 µg/m3
3:00 AM PAL O3 8 Good 39 42 PPB
3:00 AM PFS PM10 24 Good 6 7 µg/m3
3:00 AM PFS PM2.5 24 Good 20 4 µg/m3
3:00 AM PMS PM2.5 24 Good 24 4 µg/m3
3:00 AM PWES O3 8 Good 16 17 PPB
3:00 AM RFN O3 8 Good 34 37 PPB
3:00 AM RIFL PM2.5 24 Good 27 5 µg/m3
3:00 AM RIFLO3 O3 8 Good 25 27 PPB
3:00 AM SSMB PM10 24 Good 6 6 µg/m3
3:00 AM SSMB PM2.5 24 Good 21 4 µg/m3
3:00 AM TEL PM10 24 Good 3 3 µg/m3
3:00 AM TEL PM2.5 24 Good 8 2 µg/m3
3:00 AM TIM NO2 1 Good 25 26 PPB
3:00 AM TIM O3 8 Good 7 8 PPB
3:00 AM WBY NO2 1 Good 30 32 PPB
3:00 AM WBY NO2 1 Good 30 32 PPB
3:00 AM WBY O3 8 Good 6 7 PPB
3:00 AM WBY PM10 24 Good 11 12 µg/m3
3:00 AM WBY PM2.5 24 Good 28 5 µg/m3
2:00 AM ACAD O3 8 Good 9 10 PPB
2:00 AM ACC PM10 24 Good 10 11 µg/m3
2:00 AM ACC PM2.5 24 Good 32 6 µg/m3
2:00 AM ADB PM10 24 Good 11 12 µg/m3
2:00 AM ADB PM2.5 24 Good 33 6 µg/m3
2:00 AM ALA PM10 24 Good 8 9 µg/m3
2:00 AM ALA PM2.5 24 Good 14 3 µg/m3
2:00 AM ASPN O3 8 Good 37 40 PPB
2:00 AM ASPN2 PM10 24 Good 4 4 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 13 2 µg/m3
2:00 AM AURE O3 8 Good 39 42 PPB
2:00 AM BHWK O3 8 Good 45 49 PPB
2:00 AM BOU PM10 24 Good 8 9 µg/m3
2:00 AM BOU PM2.5 24 Good 27 5 µg/m3
2:00 AM BOUR O3 8 Good 24 26 PPB
2:00 AM CAMP NO2 1 Good 13 14 PPB
2:00 AM CAMP NO2 1 Good 13 14 PPB
2:00 AM CAMP O3 8 Good 22 24 PPB
2:00 AM CAMP PM10 24 Good 14 15 µg/m3
2:00 AM CAMP PM2.5 24 Good 46 8 µg/m3
2:00 AM CAN PM10 24 Good 8 9 µg/m3
2:00 AM CAN PM2.5 24 Good 31 6 µg/m3
2:00 AM CASA CO 8 Good 2 0.2 PPM
2:00 AM CASA NO2 1 Good 15 16 PPB
2:00 AM CASA O3 8 Good 18 19 PPB
2:00 AM CASA PM10 24 Good 8 9 µg/m3
2:00 AM CASA PM2.5 24 Good 27 5 µg/m3
2:00 AM CCOL CO 8 Good 2 0.2 PPM
2:00 AM CCOL PM10 24 Good 10 11 µg/m3
2:00 AM CCOL PM2.5 24 Good 21 4 µg/m3
2:00 AM CHAT O3 8 Good 31 33 PPB
2:00 AM CHAT PM10 24 Good 6 7 µg/m3
2:00 AM CHAT PM2.5 24 Good 24 4 µg/m3
2:00 AM CTZ O3 8 Good 32 35 PPB
2:00 AM EVG O3 8 Good 41 44 PPB
2:00 AM FOS NO2 1 Good 31 33 PPB
2:00 AM FOS O3 8 Good 15 16 PPB
2:00 AM FTC CO 8 Good 2 0.2 PPM
2:00 AM FTC O3 8 Good 20 22 PPB
2:00 AM FTCF PM10 24 Good 8 9 µg/m3
2:00 AM FTCF PM2.5 24 Good 37 7 µg/m3
2:00 AM FTCW O3 8 Good 31 34 PPB
2:00 AM GJPB PM10 24 Good 6 6 µg/m3
2:00 AM GJPB PM2.5 24 Good 22 4 µg/m3
2:00 AM GREH PM10 24 Good 6 7 µg/m3
2:00 AM GREH PM2.5 24 Good 31 6 µg/m3
2:00 AM GRET CO 8 Good 3 0.3 PPM
2:00 AM GRET O3 8 Good 13 14 PPB
2:00 AM HLD O3 8 Good 30 32 PPB
2:00 AM I25DEN CO 8 Good 3 0.3 PPM
2:00 AM I25DEN NO2 1 Good 17 18 PPB
2:00 AM I25DEN PM10 24 Good 6 7 µg/m3
2:00 AM I25DEN PM2.5 24 Good 32 6 µg/m3
2:00 AM I25GLO NO2 1 Good 18 19 PPB
2:00 AM I25GLO PM10 24 Good 8 9 µg/m3
2:00 AM I25GLO PM2.5 24 Good 39 7 µg/m3
2:00 AM LAST NO2 1 Good 27 29 PPB
2:00 AM LAST O3 8 Good 24 26 PPB
2:00 AM LMB PM10 24 Good 7 8 µg/m3
2:00 AM LMB PM2.5 24 Good 14 3 µg/m3
2:00 AM LNGM PM10 24 Good 11 12 µg/m3
2:00 AM LNGM PM2.5 24 Good 43 8 µg/m3
2:00 AM MAN O3 8 Good 30 32 PPB
2:00 AM NJH PM10 24 Good 8 9 µg/m3
2:00 AM NJH PM2.5 24 Good 29 5 µg/m3
2:00 AM NREL O3 8 Good 36 39 PPB
2:00 AM PAG PM10 24 Good 7 8 µg/m3
2:00 AM PAG PM2.5 24 Good 15 3 µg/m3
2:00 AM PAL O3 8 Good 41 44 PPB
2:00 AM PFS PM10 24 Good 6 7 µg/m3
2:00 AM PFS PM2.5 24 Good 21 4 µg/m3
2:00 AM PMS PM2.5 24 Good 23 4 µg/m3
2:00 AM PWES O3 8 Good 19 20 PPB
2:00 AM RFN NO2 1 Good 1 1 PPB
2:00 AM RFN O3 8 Good 31 34 PPB
2:00 AM RIFL PM2.5 24 Good 27 5 µg/m3
2:00 AM RIFLO3 O3 8 Good 25 27 PPB
2:00 AM SSMB PM10 24 Good 6 6 µg/m3
2:00 AM SSMB PM2.5 24 Good 21 4 µg/m3
2:00 AM TEL PM10 24 Good 3 3 µg/m3
2:00 AM TEL PM2.5 24 Good 8 2 µg/m3
2:00 AM TIM NO2 1 Good 26 28 PPB
2:00 AM TIM O3 8 Good 9 10 PPB
2:00 AM WBY NO2 1 Good 33 35 PPB
2:00 AM WBY NO2 1 Good 33 35 PPB
2:00 AM WBY O3 8 Good 6 7 PPB
2:00 AM WBY PM10 24 Good 11 12 µg/m3
2:00 AM WBY PM2.5 24 Good 28 5 µg/m3
1:00 AM ACAD O3 8 Good 12 13 PPB
1:00 AM ACC PM10 24 Good 10 11 µg/m3
1:00 AM ACC PM2.5 24 Good 33 6 µg/m3
1:00 AM ADB PM10 24 Good 11 12 µg/m3
1:00 AM ADB PM2.5 24 Good 32 6 µg/m3
1:00 AM ALA PM10 24 Good 8 9 µg/m3
1:00 AM ALA PM2.5 24 Good 14 3 µg/m3
1:00 AM ASPN O3 8 Good 36 39 PPB
1:00 AM ASPN2 PM10 24 Good 4 4 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 12 2 µg/m3
1:00 AM AURE O3 8 Good 39 42 PPB
1:00 AM BHWK O3 8 Good 45 49 PPB
1:00 AM BOU PM10 24 Good 8 9 µg/m3
1:00 AM BOU PM2.5 24 Good 27 5 µg/m3
1:00 AM BOUR O3 8 Good 25 27 PPB
1:00 AM CAMP NO2 1 Good 13 14 PPB
1:00 AM CAMP NO2 1 Good 13 14 PPB
1:00 AM CAMP O3 8 Good 22 24 PPB
1:00 AM CAMP PM10 24 Good 15 16 µg/m3
1:00 AM CAMP PM2.5 24 Good 50 9 µg/m3
1:00 AM CAN PM10 24 Good 9 10 µg/m3
1:00 AM CAN PM2.5 24 Good 34 6 µg/m3
1:00 AM CASA CO 8 Good 2 0.2 PPM
1:00 AM CASA NO2 1 Good 16 17 PPB
1:00 AM CASA O3 8 Good 18 19 PPB
1:00 AM CASA PM10 24 Good 9 10 µg/m3
1:00 AM CASA PM2.5 24 Good 26 5 µg/m3
1:00 AM CCOL CO 8 Good 2 0.2 PPM
1:00 AM CCOL PM10 24 Good 10 11 µg/m3
1:00 AM CCOL PM2.5 24 Good 21 4 µg/m3
1:00 AM CHAT O3 8 Good 31 33 PPB
1:00 AM CHAT PM10 24 Good 6 7 µg/m3
1:00 AM CHAT PM2.5 24 Good 23 4 µg/m3
1:00 AM CTZ O3 8 Good 35 38 PPB
1:00 AM EVG O3 8 Good 38 41 PPB
1:00 AM FOS NO2 1 Good 31 33 PPB
1:00 AM FOS O3 8 Good 19 20 PPB
1:00 AM FTC CO 8 Good 2 0.2 PPM
1:00 AM FTC O3 8 Good 20 22 PPB
1:00 AM FTCF PM10 24 Good 7 8 µg/m3
1:00 AM FTCF PM2.5 24 Good 36 6 µg/m3
1:00 AM FTCW O3 8 Good 31 34 PPB
1:00 AM GJPB PM10 24 Good 6 7 µg/m3
1:00 AM GJPB PM2.5 24 Good 24 4 µg/m3
1:00 AM GREH PM10 24 Good 6 7 µg/m3
1:00 AM GREH PM2.5 24 Good 30 5 µg/m3
1:00 AM GRET CO 8 Good 2 0.2 PPM
1:00 AM GRET O3 8 Good 17 18 PPB
1:00 AM HLD O3 8 Good 28 30 PPB
1:00 AM I25DEN CO 8 Good 3 0.3 PPM
1:00 AM I25DEN NO2 1 Good 20 21 PPB
1:00 AM I25DEN PM10 24 Good 6 7 µg/m3
1:00 AM I25DEN PM2.5 24 Good 32 6 µg/m3
1:00 AM I25GLO NO2 1 Good 19 20 PPB
1:00 AM I25GLO PM10 24 Good 8 9 µg/m3
1:00 AM I25GLO PM2.5 24 Good 39 7 µg/m3
1:00 AM LAST NO2 1 Good 27 29 PPB
1:00 AM LAST O3 8 Good 28 30 PPB
1:00 AM LMB PM10 24 Good 7 8 µg/m3
1:00 AM LMB PM2.5 24 Good 15 3 µg/m3
1:00 AM LNGM PM10 24 Good 11 12 µg/m3
1:00 AM LNGM PM2.5 24 Good 41 7 µg/m3
1:00 AM MAN O3 8 Good 30 32 PPB
1:00 AM NJH PM10 24 Good 8 9 µg/m3
1:00 AM NJH PM2.5 24 Good 29 5 µg/m3
1:00 AM NREL O3 8 Good 33 36 PPB
1:00 AM PAG PM10 24 Good 7 8 µg/m3
1:00 AM PAG PM2.5 24 Good 16 3 µg/m3
1:00 AM PAL O3 8 Good 42 45 PPB
1:00 AM PFS PM10 24 Good 6 7 µg/m3
1:00 AM PFS PM2.5 24 Good 21 4 µg/m3
1:00 AM PMS PM2.5 24 Good 22 4 µg/m3
1:00 AM PWES O3 8 Good 21 23 PPB
1:00 AM RFN NO2 1 Good 3 3 PPB
1:00 AM RFN O3 8 Good 30 32 PPB
1:00 AM RIFL PM2.5 24 Good 27 5 µg/m3
1:00 AM RIFLO3 O3 8 Good 27 29 PPB
1:00 AM SSMB PM10 24 Good 6 6 µg/m3
1:00 AM SSMB PM2.5 24 Good 20 4 µg/m3
1:00 AM TEL PM10 24 Good 3 3 µg/m3
1:00 AM TEL PM2.5 24 Good 8 2 µg/m3
1:00 AM TIM NO2 1 Good 31 33 PPB
1:00 AM TIM O3 8 Good 12 13 PPB
1:00 AM WBY NO2 1 Good 34 36 PPB
1:00 AM WBY NO2 1 Good 34 36 PPB
1:00 AM WBY O3 8 Good 9 10 PPB
1:00 AM WBY PM10 24 Good 12 13 µg/m3
1:00 AM WBY PM2.5 24 Good 27 5 µg/m3

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