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AQI Calculations on 10/27/2026 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 25 27 PPB
3:00 AM ACC PM10 24 Good 6 7 µg/m3
3:00 AM ACC PM2.5 24 Good 23 4 µg/m3
3:00 AM ADB PM10 24 Good 9 10 µg/m3
3:00 AM ADB PM2.5 24 Good 26 4 µg/m3
3:00 AM ALA PM10 24 Good 6 6 µg/m3
3:00 AM ALA PM2.5 24 Good 19 3 µg/m3
3:00 AM ASPN2 PM10 24 Good 7 8 µg/m3
3:00 AM ASPN2 PM2.5 24 Good 12 2 µg/m3
3:00 AM BHWK O3 8 Good 33 36 PPB
3:00 AM BOU PM10 24 Good 6 6 µg/m3
3:00 AM BOU PM2.5 24 Good 18 3 µg/m3
3:00 AM BOUR O3 8 Good 7 8 PPB
3:00 AM CAMP NO2 1 Good 14 15 PPB
3:00 AM CAMP NO2 1 Good 14 15 PPB
3:00 AM CAMP O3 8 Good 0 0 PPB
3:00 AM CAMP PM10 24 Good 9 10 µg/m3
3:00 AM CAMP PM2.5 24 Good 27 4 µg/m3
3:00 AM CAN PM10 24 Good 6 6 µg/m3
3:00 AM CAN PM2.5 24 Good 11 2 µg/m3
3:00 AM CASA CO 8 Good 2 0.2 PPM
3:00 AM CASA NO2 1 Good 8 8 PPB
3:00 AM CASA O3 8 Good 2 2 PPB
3:00 AM CASA PM10 24 Good 8 9 µg/m3
3:00 AM CASA PM2.5 24 Good 26 4 µg/m3
3:00 AM CCOL PM10 24 Good 6 6 µg/m3
3:00 AM CCOL PM2.5 24 Good 16 2 µg/m3
3:00 AM CHAT NO2 1 Good 12 13 PPB
3:00 AM CHAT O3 8 Good 6 7 PPB
3:00 AM CHAT PM10 24 Good 6 6 µg/m3
3:00 AM CHAT PM2.5 24 Good 21 3 µg/m3
3:00 AM CTZ O3 8 Good 14 15 PPB
3:00 AM DELT PM10 24 Good 10 11 µg/m3
3:00 AM DELT PM2.5 24 Good 22 4 µg/m3
3:00 AM DELT PM2.5 24 Good 22 4 µg/m3
3:00 AM EDW PM10 24 Good 5 5 µg/m3
3:00 AM EDW PM2.5 24 Good 10 1 µg/m3
3:00 AM EVG O3 8 Good 11 12 PPB
3:00 AM FOS NO2 1 Good 6 6 PPB
3:00 AM FOS O3 8 Good 5 5 PPB
3:00 AM FTC CO 8 Good 1 0.1 PPM
3:00 AM FTCF PM10 24 Good 6 6 µg/m3
3:00 AM FTCF PM2.5 24 Good 20 3 µg/m3
3:00 AM FTCW NO2 1 Good 5 5 PPB
3:00 AM FTCW O3 8 Good 6 6 PPB
3:00 AM GREH PM10 24 Good 4 4 µg/m3
3:00 AM GREH PM2.5 24 Good 16 2 µg/m3
3:00 AM GRET CO 8 Good 1 0.1 PPM
3:00 AM GRET O3 8 Good 5 5 PPB
3:00 AM HLD O3 8 Good 11 12 PPB
3:00 AM I25DEN CO 8 Good 5 0.4 PPM
3:00 AM I25DEN NO2 1 Good 11 12 PPB
3:00 AM I25DEN PM10 24 Good 11 12 µg/m3
3:00 AM I25DEN PM2.5 24 Good 29 5 µg/m3
3:00 AM I25GLO NO2 1 Good 9 10 PPB
3:00 AM I25GLO PM10 24 Good 11 12 µg/m3
3:00 AM I25GLO PM2.5 24 Good 28 5 µg/m3
3:00 AM LAST NO2 1 Good 7 7 PPB
3:00 AM LAST O3 8 Good 2 2 PPB
3:00 AM LMB PM10 24 Good 5 5 µg/m3
3:00 AM LMB PM2.5 24 Good 14 2 µg/m3
3:00 AM LNGM PM10 24 Good 6 7 µg/m3
3:00 AM LNGM PM2.5 24 Good 23 4 µg/m3
3:00 AM MAN O3 8 Good 23 25 PPB
3:00 AM MESA PM10 24 Good 6 7 µg/m3
3:00 AM MESA PM2.5 24 Good 17 3 µg/m3
3:00 AM MFP NO2 1 Good 4 4 PPB
3:00 AM MFP O3 8 Good 9 10 PPB
3:00 AM NJH PM10 24 Good 6 6 µg/m3
3:00 AM NJH PM2.5 24 Good 21 3 µg/m3
3:00 AM NREL O3 8 Good 13 14 PPB
3:00 AM PAG PM10 24 Good 11 12 µg/m3
3:00 AM PAG PM2.5 24 Good 14 2 µg/m3
3:00 AM PAL O3 8 Good 19 20 PPB
3:00 AM PFS PM10 24 Good 8 9 µg/m3
3:00 AM PFS PM2.5 24 Good 28 5 µg/m3
3:00 AM PMS PM2.5 24 Good 15 2 µg/m3
3:00 AM PWES O3 8 Good 12 13 PPB
3:00 AM RFN NO2 1 Good 2 2 PPB
3:00 AM RFN O3 8 Good 8 9 PPB
3:00 AM RIFLO3 O3 8 Good 6 7 PPB
3:00 AM SSMB PM10 24 Good 6 6 µg/m3
3:00 AM SSMB PM2.5 24 Good 12 2 µg/m3
3:00 AM TEL PM10 24 Good 6 6 µg/m3
3:00 AM TEL PM2.5 24 Good 9 1 µg/m3
3:00 AM TIM NO2 1 Good 4 4 PPB
3:00 AM TIM O3 8 Good 4 4 PPB
3:00 AM TIM PM10 24 Good 4 4 µg/m3
3:00 AM TIM PM2.5 24 Good 17 3 µg/m3
3:00 AM WBY NO2 1 Good 8 8 PPB
3:00 AM WBY NO2 1 Good 8 8 PPB
3:00 AM WBY O3 8 Good 3 3 PPB
3:00 AM WBY PM10 24 Good 7 8 µg/m3
3:00 AM WBY PM2.5 24 Good 23 4 µg/m3
2:00 AM ACAD O3 8 Good 26 28 PPB
2:00 AM ACC PM10 24 Good 6 7 µg/m3
2:00 AM ACC PM2.5 24 Good 21 3 µg/m3
2:00 AM ADB PM10 24 Good 9 10 µg/m3
2:00 AM ADB PM2.5 24 Good 24 4 µg/m3
2:00 AM ALA PM10 24 Good 6 6 µg/m3
2:00 AM ALA PM2.5 24 Good 18 3 µg/m3
2:00 AM ASPN2 PM10 24 Good 7 8 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 11 2 µg/m3
2:00 AM BHWK O3 8 Good 31 34 PPB
2:00 AM BOU PM10 24 Good 6 6 µg/m3
2:00 AM BOU PM2.5 24 Good 17 3 µg/m3
2:00 AM BOUR O3 8 Good 7 8 PPB
2:00 AM CAMP NO2 1 Good 16 17 PPB
2:00 AM CAMP NO2 1 Good 16 17 PPB
2:00 AM CAMP O3 8 Good 1 1 PPB
2:00 AM CAMP PM10 24 Good 9 10 µg/m3
2:00 AM CAMP PM2.5 24 Good 26 4 µg/m3
2:00 AM CAMP SO2 1 Good 1 1 PPB
2:00 AM CAMP SO2 1 Good 1 1 PPB
2:00 AM CAN PM10 24 Good 6 6 µg/m3
2:00 AM CAN PM2.5 24 Good 11 1 µg/m3
2:00 AM CASA CO 8 Good 2 0.2 PPM
2:00 AM CASA NO2 1 Good 8 8 PPB
2:00 AM CASA O3 8 Good 2 2 PPB
2:00 AM CASA PM10 24 Good 7 8 µg/m3
2:00 AM CASA PM2.5 24 Good 24 4 µg/m3
2:00 AM CCOL PM10 24 Good 6 6 µg/m3
2:00 AM CCOL PM2.5 24 Good 16 2 µg/m3
2:00 AM CHAT NO2 1 Good 9 10 PPB
2:00 AM CHAT O3 8 Good 7 8 PPB
2:00 AM CHAT PM10 24 Good 5 5 µg/m3
2:00 AM CHAT PM2.5 24 Good 19 3 µg/m3
2:00 AM CTZ O3 8 Good 17 18 PPB
2:00 AM DELT PM10 24 Good 10 11 µg/m3
2:00 AM DELT PM2.5 24 Good 22 3 µg/m3
2:00 AM DELT PM2.5 24 Good 22 3 µg/m3
2:00 AM EDW PM10 24 Good 5 5 µg/m3
2:00 AM EDW PM2.5 24 Good 10 1 µg/m3
2:00 AM EVG O3 8 Good 10 11 PPB
2:00 AM FOS NO2 1 Good 7 7 PPB
2:00 AM FOS O3 8 Good 6 6 PPB
2:00 AM FTC CO 8 Good 1 0.1 PPM
2:00 AM FTCF PM10 24 Good 5 5 µg/m3
2:00 AM FTCF PM2.5 24 Good 18 3 µg/m3
2:00 AM FTCW NO2 1 Good 6 6 PPB
2:00 AM FTCW O3 8 Good 6 6 PPB
2:00 AM GREH PM10 24 Good 4 4 µg/m3
2:00 AM GREH PM2.5 24 Good 15 2 µg/m3
2:00 AM GRET CO 8 Good 1 0.1 PPM
2:00 AM GRET O3 8 Good 6 6 PPB
2:00 AM HLD O3 8 Good 12 13 PPB
2:00 AM I25DEN CO 8 Good 6 0.5 PPM
2:00 AM I25DEN NO2 1 Good 11 12 PPB
2:00 AM I25DEN PM10 24 Good 11 12 µg/m3
2:00 AM I25DEN PM2.5 24 Good 28 5 µg/m3
2:00 AM I25GLO NO2 1 Good 10 11 PPB
2:00 AM I25GLO PM10 24 Good 10 11 µg/m3
2:00 AM I25GLO PM2.5 24 Good 26 4 µg/m3
2:00 AM LAST NO2 1 Good 7 7 PPB
2:00 AM LAST O3 8 Good 3 3 PPB
2:00 AM LMB PM10 24 Good 4 4 µg/m3
2:00 AM LMB PM2.5 24 Good 14 2 µg/m3
2:00 AM LNGM PM10 24 Good 6 6 µg/m3
2:00 AM LNGM PM2.5 24 Good 22 4 µg/m3
2:00 AM MAN O3 8 Good 23 25 PPB
2:00 AM MESA PM10 24 Good 6 7 µg/m3
2:00 AM MESA PM2.5 24 Good 17 3 µg/m3
2:00 AM MFP NO2 1 Good 4 4 PPB
2:00 AM MFP O3 8 Good 9 10 PPB
2:00 AM NJH PM10 24 Good 6 6 µg/m3
2:00 AM NJH PM2.5 24 Good 19 3 µg/m3
2:00 AM NREL O3 8 Good 11 12 PPB
2:00 AM PAG PM10 24 Good 11 12 µg/m3
2:00 AM PAG PM2.5 24 Good 14 2 µg/m3
2:00 AM PAL O3 8 Good 21 23 PPB
2:00 AM PFS PM10 24 Good 8 9 µg/m3
2:00 AM PFS PM2.5 24 Good 28 5 µg/m3
2:00 AM PMS PM2.5 24 Good 14 2 µg/m3
2:00 AM PWES O3 8 Good 13 14 PPB
2:00 AM RFN NO2 1 Good 4 4 PPB
2:00 AM RFN O3 8 Good 7 8 PPB
2:00 AM RIFLO3 O3 8 Good 7 8 PPB
2:00 AM SSMB PM10 24 Good 6 6 µg/m3
2:00 AM SSMB PM2.5 24 Good 11 2 µg/m3
2:00 AM TEL PM10 24 Good 6 6 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 4 4 PPB
2:00 AM TIM PM10 24 Good 4 4 µg/m3
2:00 AM TIM PM2.5 24 Good 16 2 µg/m3
2:00 AM WBY NO2 1 Good 8 8 PPB
2:00 AM WBY NO2 1 Good 8 8 PPB
2:00 AM WBY O3 8 Good 4 4 PPB
2:00 AM WBY PM10 24 Good 7 8 µg/m3
2:00 AM WBY PM2.5 24 Good 22 3 µg/m3
1:00 AM ACAD O3 8 Good 28 30 PPB
1:00 AM ACC PM10 24 Good 6 6 µg/m3
1:00 AM ACC PM2.5 24 Good 20 3 µg/m3
1:00 AM ADB PM10 24 Good 9 10 µg/m3
1:00 AM ADB PM2.5 24 Good 23 4 µg/m3
1:00 AM ALA PM10 24 Good 5 5 µg/m3
1:00 AM ALA PM2.5 24 Good 17 3 µg/m3
1:00 AM ASPN2 PM10 24 Good 7 8 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 11 2 µg/m3
1:00 AM BHWK O3 8 Good 29 31 PPB
1:00 AM BOU PM10 24 Good 6 6 µg/m3
1:00 AM BOU PM2.5 24 Good 17 3 µg/m3
1:00 AM BOUR O3 8 Good 7 8 PPB
1:00 AM CAMP NO2 1 Good 16 17 PPB
1:00 AM CAMP NO2 1 Good 16 17 PPB
1:00 AM CAMP O3 8 Good 2 2 PPB
1:00 AM CAMP PM10 24 Good 8 9 µg/m3
1:00 AM CAMP PM2.5 24 Good 24 4 µg/m3
1:00 AM CAMP SO2 1 Good 1 1 PPB
1:00 AM CAMP SO2 1 Good 1 1 PPB
1:00 AM CAN PM10 24 Good 6 6 µg/m3
1:00 AM CAN PM2.5 24 Good 10 1 µg/m3
1:00 AM CASA CO 8 Good 2 0.2 PPM
1:00 AM CASA NO2 1 Good 8 9 PPB
1:00 AM CASA O3 8 Good 3 3 PPB
1:00 AM CASA PM10 24 Good 7 8 µg/m3
1:00 AM CASA PM2.5 24 Good 23 4 µg/m3
1:00 AM CCOL PM10 24 Good 6 6 µg/m3
1:00 AM CCOL PM2.5 24 Good 17 3 µg/m3
1:00 AM CHAT NO2 1 Good 1 1 PPB
1:00 AM CHAT O3 8 Good 8 9 PPB
1:00 AM CHAT PM10 24 Good 5 5 µg/m3
1:00 AM CHAT PM2.5 24 Good 18 3 µg/m3
1:00 AM CTZ O3 8 Good 20 22 PPB
1:00 AM DELT PM10 24 Good 10 11 µg/m3
1:00 AM DELT PM2.5 24 Good 22 3 µg/m3
1:00 AM DELT PM2.5 24 Good 22 3 µg/m3
1:00 AM EDW PM10 24 Good 4 4 µg/m3
1:00 AM EDW PM2.5 24 Good 9 1 µg/m3
1:00 AM EVG O3 8 Good 10 11 PPB
1:00 AM FOS NO2 1 Good 8 8 PPB
1:00 AM FOS O3 8 Good 6 6 PPB
1:00 AM FTC CO 8 Good 1 0.1 PPM
1:00 AM FTCF PM10 24 Good 5 5 µg/m3
1:00 AM FTCF PM2.5 24 Good 17 3 µg/m3
1:00 AM FTCW NO2 1 Good 7 7 PPB
1:00 AM FTCW O3 8 Good 6 6 PPB
1:00 AM GREH PM10 24 Good 4 4 µg/m3
1:00 AM GREH PM2.5 24 Good 14 2 µg/m3
1:00 AM GRET CO 8 Good 1 0.1 PPM
1:00 AM GRET O3 8 Good 6 6 PPB
1:00 AM HLD O3 8 Good 14 15 PPB
1:00 AM I25DEN CO 8 Good 6 0.5 PPM
1:00 AM I25DEN NO2 1 Good 12 13 PPB
1:00 AM I25DEN PM10 24 Good 11 12 µg/m3
1:00 AM I25DEN PM2.5 24 Good 27 4 µg/m3
1:00 AM I25GLO NO2 1 Good 13 14 PPB
1:00 AM I25GLO PM10 24 Good 10 11 µg/m3
1:00 AM I25GLO PM2.5 24 Good 25 4 µg/m3
1:00 AM LAST NO2 1 Good 6 6 PPB
1:00 AM LAST O3 8 Good 4 4 PPB
1:00 AM LMB PM10 24 Good 4 4 µg/m3
1:00 AM LMB PM2.5 24 Good 14 2 µg/m3
1:00 AM LNGM PM10 24 Good 6 6 µg/m3
1:00 AM LNGM PM2.5 24 Good 21 3 µg/m3
1:00 AM MAN O3 8 Good 24 26 PPB
1:00 AM MESA PM10 24 Good 6 7 µg/m3
1:00 AM MESA PM2.5 24 Good 17 3 µg/m3
1:00 AM MFP NO2 1 Good 6 6 PPB
1:00 AM MFP O3 8 Good 9 10 PPB
1:00 AM NJH PM10 24 Good 5 5 µg/m3
1:00 AM NJH PM2.5 24 Good 18 3 µg/m3
1:00 AM NREL O3 8 Good 10 11 PPB
1:00 AM PAG PM10 24 Good 11 12 µg/m3
1:00 AM PAG PM2.5 24 Good 14 2 µg/m3
1:00 AM PAL O3 8 Good 24 26 PPB
1:00 AM PFS PM10 24 Good 9 10 µg/m3
1:00 AM PFS PM2.5 24 Good 28 5 µg/m3
1:00 AM PMS PM2.5 24 Good 14 2 µg/m3
1:00 AM PWES O3 8 Good 15 16 PPB
1:00 AM RFN NO2 1 Good 4 4 PPB
1:00 AM RFN O3 8 Good 8 9 PPB
1:00 AM RIFLO3 O3 8 Good 10 11 PPB
1:00 AM SSMB PM10 24 Good 5 5 µg/m3
1:00 AM SSMB PM2.5 24 Good 11 2 µg/m3
1:00 AM TEL PM10 24 Good 6 6 µg/m3
1:00 AM TEL PM2.5 24 Good 10 1 µg/m3
1:00 AM TIM NO2 1 Good 4 4 PPB
1:00 AM TIM O3 8 Good 4 4 PPB
1:00 AM TIM PM10 24 Good 3 3 µg/m3
1:00 AM TIM PM2.5 24 Good 14 2 µg/m3
1:00 AM WBY NO2 1 Good 9 10 PPB
1:00 AM WBY NO2 1 Good 9 10 PPB
1:00 AM WBY O3 8 Good 5 5 PPB
1:00 AM WBY PM10 24 Good 6 7 µg/m3
1:00 AM WBY PM2.5 24 Good 20 3 µg/m3

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