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AQI Calculations on 10/25/2026 1:00AM - 2:00AM

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.
2:00 AM ACAD O3 8 Good 23 25 PPB
2:00 AM ACC PM10 24 Good 13 14 µg/m3
2:00 AM ACC PM2.5 24 Good 26 4 µg/m3
2:00 AM ADB PM10 24 Good 21 23 µg/m3
2:00 AM ADB PM2.5 24 Good 21 3 µg/m3
2:00 AM ALA PM10 24 Good 5 5 µg/m3
2:00 AM ALA PM2.5 24 Good 15 2 µg/m3
2:00 AM ASPN2 PM10 24 Good 4 4 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 10 1 µg/m3
2:00 AM BHWK O3 8 Good 22 24 PPB
2:00 AM BOU PM10 24 Good 14 15 µg/m3
2:00 AM BOU PM2.5 24 Good 18 3 µg/m3
2:00 AM BOUR O3 8 Good 20 22 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 20 22 PPB
2:00 AM CAMP PM10 24 Good 15 16 µg/m3
2:00 AM CAMP PM2.5 24 Good 23 4 µg/m3
2:00 AM CAN PM10 24 Good 7 8 µg/m3
2:00 AM CAN PM2.5 24 Good 16 2 µg/m3
2:00 AM CASA CO 8 Good 1 0.1 PPM
2:00 AM CASA NO2 1 Good 15 16 PPB
2:00 AM CASA O3 8 Good 19 20 PPB
2:00 AM CASA PM10 24 Good 14 15 µg/m3
2:00 AM CASA PM2.5 24 Good 22 3 µg/m3
2:00 AM CCOL PM10 24 Good 12 13 µg/m3
2:00 AM CCOL PM2.5 24 Good 18 3 µg/m3
2:00 AM CHAT NO2 1 Good 2 2 PPB
2:00 AM CHAT O3 8 Good 24 26 PPB
2:00 AM CHAT PM10 24 Good 9 10 µg/m3
2:00 AM CHAT PM2.5 24 Good 20 3 µg/m3
2:00 AM CTZ O3 8 Good 26 28 PPB
2:00 AM DELT PM10 24 Good 6 7 µg/m3
2:00 AM DELT PM2.5 24 Good 18 3 µg/m3
2:00 AM DELT PM2.5 24 Good 18 3 µg/m3
2:00 AM EDW PM10 24 Good 5 5 µg/m3
2:00 AM EDW PM2.5 24 Good 12 2 µg/m3
2:00 AM EVG O3 8 Good 16 17 PPB
2:00 AM FOS NO2 1 Good 4 4 PPB
2:00 AM FOS O3 8 Good 23 25 PPB
2:00 AM FTC CO 8 Good 1 0.1 PPM
2:00 AM FTCF PM10 24 Good 11 12 µg/m3
2:00 AM FTCF PM2.5 24 Good 19 3 µg/m3
2:00 AM FTCW NO2 1 Good 3 3 PPB
2:00 AM FTCW O3 8 Good 23 25 PPB
2:00 AM GREH PM10 24 Good 12 13 µg/m3
2:00 AM GREH PM2.5 24 Good 16 2 µg/m3
2:00 AM GRET CO 8 Good 1 0.1 PPM
2:00 AM GRET O3 8 Good 24 26 PPB
2:00 AM HLD O3 8 Good 26 28 PPB
2:00 AM I25DEN CO 8 Good 2 0.2 PPM
2:00 AM I25DEN NO2 1 Good 15 16 PPB
2:00 AM I25DEN PM10 24 Good 15 16 µg/m3
2:00 AM I25DEN PM2.5 24 Good 24 4 µg/m3
2:00 AM I25GLO NO2 1 Good 16 17 PPB
2:00 AM I25GLO PM10 24 Good 14 15 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 19 20 PPB
2:00 AM LMB PM10 24 Good 9 10 µg/m3
2:00 AM LMB PM2.5 24 Good 17 3 µg/m3
2:00 AM LNGM PM10 24 Good 14 15 µg/m3
2:00 AM LNGM PM2.5 24 Good 19 3 µg/m3
2:00 AM MAN O3 8 Good 20 22 PPB
2:00 AM MESA PM10 24 Good 5 5 µg/m3
2:00 AM MESA PM2.5 24 Good 14 2 µg/m3
2:00 AM MFP NO2 1 Good 3 3 PPB
2:00 AM MFP O3 8 Good 25 27 PPB
2:00 AM NJH PM10 24 Good 12 13 µg/m3
2:00 AM NJH PM2.5 24 Good 22 3 µg/m3
2:00 AM NREL O3 8 Good 29 31 PPB
2:00 AM PAG PM10 24 Good 4 4 µg/m3
2:00 AM PAG PM2.5 24 Good 11 1 µg/m3
2:00 AM PAL O3 8 Good 30 32 PPB
2:00 AM PFS PM10 24 Good 9 10 µg/m3
2:00 AM PFS PM2.5 24 Good 17 3 µg/m3
2:00 AM PMS PM2.5 24 Good 18 3 µg/m3
2:00 AM PWES O3 8 Good 19 21 PPB
2:00 AM RFN NO2 1 Good 5 5 PPB
2:00 AM RFN O3 8 Good 19 21 PPB
2:00 AM RIFLO3 O3 8 Good 11 12 PPB
2:00 AM SSMB PM10 24 Good 6 7 µg/m3
2:00 AM SSMB PM2.5 24 Good 17 3 µg/m3
2:00 AM TEL PM10 24 Good 4 4 µg/m3
2:00 AM TEL PM2.5 24 Good 9 1 µg/m3
2:00 AM TIM NO2 1 Good 3 3 PPB
2:00 AM TIM O3 8 Good 21 23 PPB
2:00 AM TIM PM10 24 Good 10 11 µg/m3
2:00 AM TIM PM2.5 24 Good 16 2 µg/m3
2:00 AM WBY NO2 1 Good 11 12 PPB
2:00 AM WBY NO2 1 Good 11 12 PPB
2:00 AM WBY O3 8 Good 19 21 PPB
2:00 AM WBY PM10 24 Good 13 14 µg/m3
2:00 AM WBY PM2.5 24 Good 17 3 µg/m3
1:00 AM ACAD O3 8 Good 24 26 PPB
1:00 AM ACC PM10 24 Good 13 14 µg/m3
1:00 AM ACC PM2.5 24 Good 26 4 µg/m3
1:00 AM ADB PM10 24 Good 22 24 µg/m3
1:00 AM ADB PM2.5 24 Good 21 3 µg/m3
1:00 AM ALA PM10 24 Good 5 5 µg/m3
1:00 AM ALA PM2.5 24 Good 16 2 µg/m3
1:00 AM ASPN2 PM10 24 Good 5 5 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 10 1 µg/m3
1:00 AM BHWK O3 8 Good 24 26 PPB
1:00 AM BOU PM10 24 Good 14 15 µg/m3
1:00 AM BOU PM2.5 24 Good 18 3 µg/m3
1:00 AM BOUR O3 8 Good 23 25 PPB
1:00 AM CAMP NO2 1 Good 8 8 PPB
1:00 AM CAMP NO2 1 Good 8 8 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 22 4 µg/m3
1:00 AM CAN PM10 24 Good 7 8 µg/m3
1:00 AM CAN PM2.5 24 Good 16 2 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 21 23 PPB
1:00 AM CASA PM10 24 Good 14 15 µg/m3
1:00 AM CASA PM2.5 24 Good 21 3 µg/m3
1:00 AM CCOL PM10 24 Good 13 14 µg/m3
1:00 AM CCOL PM2.5 24 Good 18 3 µg/m3
1:00 AM CHAT NO2 1 Good 1 1 PPB
1:00 AM CHAT O3 8 Good 25 27 PPB
1:00 AM CHAT PM10 24 Good 9 10 µg/m3
1:00 AM CHAT PM2.5 24 Good 19 3 µg/m3
1:00 AM CTZ O3 8 Good 26 28 PPB
1:00 AM DELT PM10 24 Good 6 7 µg/m3
1:00 AM DELT PM2.5 24 Good 18 3 µg/m3
1:00 AM DELT PM2.5 24 Good 18 3 µg/m3
1:00 AM EDW PM10 24 Good 5 5 µg/m3
1:00 AM EDW PM2.5 24 Good 12 2 µg/m3
1:00 AM EVG O3 8 Good 19 21 PPB
1:00 AM FOS NO2 1 Good 4 4 PPB
1:00 AM FOS O3 8 Good 25 27 PPB
1:00 AM FTC CO 8 Good 1 0.1 PPM
1:00 AM FTCF PM10 24 Good 11 12 µg/m3
1:00 AM FTCF PM2.5 24 Good 19 3 µg/m3
1:00 AM FTCW NO2 1 Good 3 3 PPB
1:00 AM FTCW O3 8 Good 25 27 PPB
1:00 AM GREH PM10 24 Good 12 13 µg/m3
1:00 AM GREH PM2.5 24 Good 15 2 µg/m3
1:00 AM GRET CO 8 Good 1 0.1 PPM
1:00 AM GRET O3 8 Good 25 27 PPB
1:00 AM HLD O3 8 Good 27 29 PPB
1:00 AM I25DEN CO 8 Good 2 0.2 PPM
1:00 AM I25DEN NO2 1 Good 10 11 PPB
1:00 AM I25DEN PM10 24 Good 15 16 µg/m3
1:00 AM I25DEN PM2.5 24 Good 23 4 µg/m3
1:00 AM I25GLO NO2 1 Good 12 13 PPB
1:00 AM I25GLO PM10 24 Good 14 15 µg/m3
1:00 AM I25GLO PM2.5 24 Good 19 3 µg/m3
1:00 AM LAST NO2 1 Good 3 3 PPB
1:00 AM LAST O3 8 Good 20 22 PPB
1:00 AM LMB PM10 24 Good 9 10 µg/m3
1:00 AM LMB PM2.5 24 Good 17 3 µg/m3
1:00 AM LNGM PM10 24 Good 14 15 µg/m3
1:00 AM LNGM PM2.5 24 Good 19 3 µg/m3
1:00 AM MAN O3 8 Good 21 23 PPB
1:00 AM MESA PM10 24 Good 6 6 µg/m3
1:00 AM MESA PM2.5 24 Good 15 2 µg/m3
1:00 AM MFP NO2 1 Good 3 3 PPB
1:00 AM MFP O3 8 Good 27 29 PPB
1:00 AM NJH PM10 24 Good 12 13 µg/m3
1:00 AM NJH PM2.5 24 Good 22 3 µg/m3
1:00 AM NREL O3 8 Good 30 32 PPB
1:00 AM PAG PM10 24 Good 4 4 µg/m3
1:00 AM PAG PM2.5 24 Good 11 2 µg/m3
1:00 AM PAL O3 8 Good 30 32 PPB
1:00 AM PFS PM10 24 Good 9 10 µg/m3
1:00 AM PFS PM2.5 24 Good 16 2 µg/m3
1:00 AM PMS PM2.5 24 Good 17 3 µg/m3
1:00 AM PWES O3 8 Good 20 22 PPB
1:00 AM RFN NO2 1 Good 5 5 PPB
1:00 AM RFN O3 8 Good 21 23 PPB
1:00 AM RIFLO3 O3 8 Good 12 13 PPB
1:00 AM SSMB PM10 24 Good 6 7 µg/m3
1:00 AM SSMB PM2.5 24 Good 17 3 µg/m3
1:00 AM TEL PM10 24 Good 5 5 µg/m3
1:00 AM TEL PM2.5 24 Good 10 1 µg/m3
1:00 AM TIM NO2 1 Good 2 2 PPB
1:00 AM TIM O3 8 Good 23 25 PPB
1:00 AM TIM PM10 24 Good 9 10 µg/m3
1:00 AM TIM PM2.5 24 Good 15 2 µg/m3
1:00 AM WBY NO2 1 Good 10 11 PPB
1:00 AM WBY NO2 1 Good 10 11 PPB
1:00 AM WBY O3 8 Good 22 24 PPB
1:00 AM WBY PM10 24 Good 13 14 µg/m3
1:00 AM WBY PM2.5 24 Good 17 3 µg/m3

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