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AQI Calculations on 09/24/2026 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 19 21 PPB
3:00 AM ACC PM10 24 Good 10 11 µg/m3
3:00 AM ACC PM2.5 24 Good 16 2 µg/m3
3:00 AM ADB PM10 24 Good 26 28 µg/m3
3:00 AM ADB PM2.5 24 Good 25 4 µg/m3
3:00 AM ALA PM10 24 Good 3 3 µg/m3
3:00 AM ALA PM2.5 24 Good 9 1 µg/m3
3:00 AM ASPN2 PM10 24 Good 7 8 µg/m3
3:00 AM ASPN2 PM2.5 24 Good 11 1 µg/m3
3:00 AM BHWK O3 8 Good 22 24 PPB
3:00 AM BOU PM10 24 Good 16 17 µg/m3
3:00 AM BOU PM2.5 24 Good 18 3 µg/m3
3:00 AM BOUR O3 8 Good 24 26 PPB
3:00 AM CAMP NO2 1 Good 8 9 PPB
3:00 AM CAMP NO2 1 Good 8 9 PPB
3:00 AM CAMP O3 8 Good 26 28 PPB
3:00 AM CAMP PM10 24 Good 18 19 µg/m3
3:00 AM CAMP PM2.5 24 Good 22 3 µg/m3
3:00 AM CAN PM10 24 Good 8 9 µg/m3
3:00 AM CAN PM2.5 24 Good 9 1 µg/m3
3:00 AM CASA CO 8 Good 1 0.1 PPM
3:00 AM CASA NO2 1 Good 7 7 PPB
3:00 AM CASA O3 8 Good 25 27 PPB
3:00 AM CASA PM10 24 Good 16 17 µg/m3
3:00 AM CASA PM2.5 24 Good 21 3 µg/m3
3:00 AM CCOL PM10 24 Good 10 11 µg/m3
3:00 AM CCOL PM2.5 24 Good 17 3 µg/m3
3:00 AM CHAT NO2 1 Good 4 4 PPB
3:00 AM CHAT O3 8 Good 28 30 PPB
3:00 AM CHAT PM10 24 Good 8 9 µg/m3
3:00 AM CHAT PM2.5 24 Good 12 2 µg/m3
3:00 AM CTZ O3 8 Good 13 14 PPB
3:00 AM DELT PM10 24 Good 10 11 µg/m3
3:00 AM DELT PM2.5 24 Good 15 2 µg/m3
3:00 AM DELT PM2.5 24 Good 15 2 µg/m3
3:00 AM EVG O3 8 Good 18 19 PPB
3:00 AM FOS NO2 1 Good 5 5 PPB
3:00 AM FOS O3 8 Good 21 23 PPB
3:00 AM FTC CO 8 Good 1 0.1 PPM
3:00 AM FTCF PM10 24 Good 16 17 µg/m3
3:00 AM FTCF PM2.5 24 Good 23 4 µg/m3
3:00 AM FTCW NO2 1 Good 1 1 PPB
3:00 AM FTCW O3 8 Good 24 26 PPB
3:00 AM GREH PM10 24 Good 14 15 µg/m3
3:00 AM GREH PM2.5 24 Good 22 4 µg/m3
3:00 AM GRET CO 8 Good 0 0.0 PPM
3:00 AM GRET O3 8 Good 22 24 PPB
3:00 AM HLD O3 8 Good 30 32 PPB
3:00 AM I25DEN CO 8 Good 2 0.2 PPM
3:00 AM I25DEN NO2 1 Good 14 15 PPB
3:00 AM I25DEN PM10 24 Good 14 15 µg/m3
3:00 AM I25DEN PM2.5 24 Good 20 3 µg/m3
3:00 AM I25GLO NO2 1 Good 16 17 PPB
3:00 AM I25GLO PM10 24 Good 20 22 µg/m3
3:00 AM I25GLO PM2.5 24 Good 24 4 µg/m3
3:00 AM LAST NO2 1 Good 6 6 PPB
3:00 AM LAST O3 8 Good 19 21 PPB
3:00 AM LMB PM10 24 Good 6 7 µg/m3
3:00 AM LMB PM2.5 24 Good 18 3 µg/m3
3:00 AM LNGM PM10 24 Good 19 20 µg/m3
3:00 AM LNGM PM2.5 24 Good 23 4 µg/m3
3:00 AM MAN O3 8 Good 26 28 PPB
3:00 AM MFP NO2 1 Good 2 2 PPB
3:00 AM MFP O3 8 Good 26 28 PPB
3:00 AM NJH PM10 24 Good 12 13 µg/m3
3:00 AM NJH PM2.5 24 Good 19 3 µg/m3
3:00 AM NREL O3 8 Good 28 30 PPB
3:00 AM PAG PM10 24 Good 4 4 µg/m3
3:00 AM PAG PM2.5 24 Good 8 1 µg/m3
3:00 AM PAL O3 8 Good 24 26 PPB
3:00 AM PFS PM10 24 Good 11 12 µg/m3
3:00 AM PFS PM2.5 24 Good 14 2 µg/m3
3:00 AM PMS PM2.5 24 Good 23 4 µg/m3
3:00 AM PWES O3 8 Good 28 30 PPB
3:00 AM RFN NO2 1 Good 5 5 PPB
3:00 AM RFN O3 8 Good 22 24 PPB
3:00 AM RIFLO3 O3 8 Good 12 13 PPB
3:00 AM SSMB PM10 24 Good 7 8 µg/m3
3:00 AM SSMB PM2.5 24 Good 13 2 µg/m3
3:00 AM TEL PM10 24 Good 7 8 µg/m3
3:00 AM TEL PM2.5 24 Good 12 2 µg/m3
3:00 AM TIM NO2 1 Good 1 1 PPB
3:00 AM TIM O3 8 Good 18 19 PPB
3:00 AM TIM PM10 24 Good 15 16 µg/m3
3:00 AM TIM PM2.5 24 Good 22 3 µg/m3
3:00 AM WBY NO2 1 Good 10 11 PPB
3:00 AM WBY NO2 1 Good 10 11 PPB
3:00 AM WBY O3 8 Good 26 28 PPB
3:00 AM WBY PM10 24 Good 27 29 µg/m3
3:00 AM WBY PM2.5 24 Good 23 4 µg/m3
2:00 AM ACAD O3 8 Good 21 23 PPB
2:00 AM ACC PM10 24 Good 10 11 µg/m3
2:00 AM ACC PM2.5 24 Good 16 2 µg/m3
2:00 AM ADB PM10 24 Good 26 28 µg/m3
2:00 AM ADB PM2.5 24 Good 25 4 µg/m3
2:00 AM ALA PM10 24 Good 3 3 µg/m3
2:00 AM ALA PM2.5 24 Good 9 1 µg/m3
2:00 AM ASPN2 PM10 24 Good 7 8 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 10 1 µg/m3
2:00 AM BHWK O3 8 Good 24 26 PPB
2:00 AM BOU PM10 24 Good 16 17 µg/m3
2:00 AM BOU PM2.5 24 Good 18 3 µg/m3
2:00 AM BOUR O3 8 Good 27 29 PPB
2:00 AM CAMP NO2 1 Good 8 8 PPB
2:00 AM CAMP NO2 1 Good 8 8 PPB
2:00 AM CAMP O3 8 Good 27 29 PPB
2:00 AM CAMP PM10 24 Good 18 19 µg/m3
2:00 AM CAMP PM2.5 24 Good 21 3 µg/m3
2:00 AM CAN PM10 24 Good 8 9 µg/m3
2:00 AM CAN PM2.5 24 Good 9 1 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 27 29 PPB
2:00 AM CASA PM10 24 Good 16 17 µg/m3
2:00 AM CASA PM2.5 24 Good 21 3 µg/m3
2:00 AM CCOL PM10 24 Good 11 12 µg/m3
2:00 AM CCOL PM2.5 24 Good 18 3 µg/m3
2:00 AM CHAT NO2 1 Good 5 5 PPB
2:00 AM CHAT O3 8 Good 29 31 PPB
2:00 AM CHAT PM10 24 Good 8 9 µg/m3
2:00 AM CHAT PM2.5 24 Good 12 2 µg/m3
2:00 AM CTZ O3 8 Good 16 17 PPB
2:00 AM DELT PM10 24 Good 10 11 µg/m3
2:00 AM DELT PM2.5 24 Good 15 2 µg/m3
2:00 AM DELT PM2.5 24 Good 15 2 µg/m3
2:00 AM EVG O3 8 Good 19 21 PPB
2:00 AM FOS NO2 1 Good 5 5 PPB
2:00 AM FOS O3 8 Good 22 24 PPB
2:00 AM FTC CO 8 Good 1 0.1 PPM
2:00 AM FTCF PM10 24 Good 16 17 µg/m3
2:00 AM FTCF PM2.5 24 Good 23 4 µg/m3
2:00 AM FTCW NO2 1 Good 2 2 PPB
2:00 AM FTCW O3 8 Good 25 27 PPB
2:00 AM GREH PM10 24 Good 15 16 µg/m3
2:00 AM GREH PM2.5 24 Good 22 4 µg/m3
2:00 AM GRET CO 8 Good 0 0.0 PPM
2:00 AM GRET O3 8 Good 24 26 PPB
2:00 AM HLD O3 8 Good 31 34 PPB
2:00 AM I25DEN CO 8 Good 2 0.2 PPM
2:00 AM I25DEN NO2 1 Good 14 15 PPB
2:00 AM I25DEN PM10 24 Good 14 15 µg/m3
2:00 AM I25DEN PM2.5 24 Good 20 3 µg/m3
2:00 AM I25GLO NO2 1 Good 16 17 PPB
2:00 AM I25GLO PM10 24 Good 20 22 µg/m3
2:00 AM I25GLO PM2.5 24 Good 24 4 µg/m3
2:00 AM LAST NO2 1 Good 7 7 PPB
2:00 AM LAST O3 8 Good 20 22 PPB
2:00 AM LMB PM10 24 Good 6 7 µg/m3
2:00 AM LMB PM2.5 24 Good 18 3 µg/m3
2:00 AM LNGM PM10 24 Good 19 20 µg/m3
2:00 AM LNGM PM2.5 24 Good 23 4 µg/m3
2:00 AM MAN O3 8 Good 27 29 PPB
2:00 AM MFP NO2 1 Good 2 2 PPB
2:00 AM MFP O3 8 Good 27 29 PPB
2:00 AM NJH PM10 24 Good 12 13 µg/m3
2:00 AM NJH PM2.5 24 Good 19 3 µg/m3
2:00 AM NREL O3 8 Good 31 34 PPB
2:00 AM PAG PM10 24 Good 4 4 µg/m3
2:00 AM PAG PM2.5 24 Good 7 1 µg/m3
2:00 AM PAL O3 8 Good 26 28 PPB
2:00 AM PFS PM10 24 Good 11 12 µg/m3
2:00 AM PFS PM2.5 24 Good 14 2 µg/m3
2:00 AM PMS PM2.5 24 Good 23 4 µg/m3
2:00 AM PWES O3 8 Good 29 31 PPB
2:00 AM RFN NO2 1 Good 7 7 PPB
2:00 AM RFN O3 8 Good 24 26 PPB
2:00 AM RIFLO3 O3 8 Good 15 16 PPB
2:00 AM SSMB PM10 24 Good 6 7 µg/m3
2:00 AM SSMB PM2.5 24 Good 13 2 µg/m3
2:00 AM TEL PM10 24 Good 7 8 µg/m3
2:00 AM TEL PM2.5 24 Good 11 2 µg/m3
2:00 AM TIM NO2 1 Good 2 2 PPB
2:00 AM TIM O3 8 Good 19 20 PPB
2:00 AM TIM PM10 24 Good 16 17 µg/m3
2:00 AM TIM PM2.5 24 Good 22 3 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 29 31 PPB
2:00 AM WBY PM10 24 Good 26 28 µg/m3
2:00 AM WBY PM2.5 24 Good 23 4 µg/m3
1:00 AM ACAD O3 8 Good 23 25 PPB
1:00 AM ACC PM10 24 Good 10 11 µg/m3
1:00 AM ACC PM2.5 24 Good 16 2 µg/m3
1:00 AM ADB PM10 24 Good 26 28 µg/m3
1:00 AM ADB PM2.5 24 Good 24 4 µg/m3
1:00 AM ALA PM10 24 Good 3 3 µg/m3
1:00 AM ALA PM2.5 24 Good 9 1 µg/m3
1:00 AM ASPN2 PM10 24 Good 7 8 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 10 1 µg/m3
1:00 AM BHWK O3 8 Good 26 28 PPB
1:00 AM BOU PM10 24 Good 16 17 µg/m3
1:00 AM BOU PM2.5 24 Good 17 3 µg/m3
1:00 AM BOUR O3 8 Good 30 32 PPB
1:00 AM CAMP NO2 1 Good 9 10 PPB
1:00 AM CAMP NO2 1 Good 9 10 PPB
1:00 AM CAMP O3 8 Good 28 30 PPB
1:00 AM CAMP PM10 24 Good 18 19 µg/m3
1:00 AM CAMP PM2.5 24 Good 21 3 µg/m3
1:00 AM CAN PM10 24 Good 8 9 µg/m3
1:00 AM CAN PM2.5 24 Good 9 1 µg/m3
1:00 AM CASA CO 8 Good 1 0.1 PPM
1:00 AM CASA NO2 1 Good 6 6 PPB
1:00 AM CASA O3 8 Good 29 31 PPB
1:00 AM CASA PM10 24 Good 15 16 µg/m3
1:00 AM CASA PM2.5 24 Good 21 3 µg/m3
1:00 AM CCOL PM10 24 Good 11 12 µg/m3
1:00 AM CCOL PM2.5 24 Good 18 3 µg/m3
1:00 AM CHAT NO2 1 Good 2 2 PPB
1:00 AM CHAT O3 8 Good 31 33 PPB
1:00 AM CHAT PM10 24 Good 8 9 µg/m3
1:00 AM CHAT PM2.5 24 Good 12 2 µg/m3
1:00 AM CTZ O3 8 Good 19 21 PPB
1:00 AM DELT PM10 24 Good 10 11 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 EVG O3 8 Good 22 24 PPB
1:00 AM FOS NO2 1 Good 5 5 PPB
1:00 AM FOS O3 8 Good 24 26 PPB
1:00 AM FTC CO 8 Good 1 0.1 PPM
1:00 AM FTCF PM10 24 Good 16 17 µg/m3
1:00 AM FTCF PM2.5 24 Good 23 4 µg/m3
1:00 AM FTCW NO2 1 Good 2 2 PPB
1:00 AM FTCW O3 8 Good 26 28 PPB
1:00 AM GREH PM10 24 Good 15 16 µg/m3
1:00 AM GREH PM2.5 24 Good 23 4 µg/m3
1:00 AM GRET CO 8 Good 0 0.0 PPM
1:00 AM GRET O3 8 Good 26 28 PPB
1:00 AM HLD O3 8 Good 32 35 PPB
1:00 AM I25DEN CO 8 Good 2 0.2 PPM
1:00 AM I25DEN NO2 1 Good 16 17 PPB
1:00 AM I25DEN PM10 24 Good 14 15 µg/m3
1:00 AM I25DEN PM2.5 24 Good 20 3 µg/m3
1:00 AM I25GLO NO2 1 Good 18 19 PPB
1:00 AM I25GLO PM10 24 Good 20 22 µg/m3
1:00 AM I25GLO PM2.5 24 Good 24 4 µg/m3
1:00 AM LAST NO2 1 Good 6 6 PPB
1:00 AM LAST O3 8 Good 22 24 PPB
1:00 AM LMB PM10 24 Good 6 7 µg/m3
1:00 AM LMB PM2.5 24 Good 18 3 µg/m3
1:00 AM LNGM PM10 24 Good 19 20 µg/m3
1:00 AM LNGM PM2.5 24 Good 23 4 µg/m3
1:00 AM MAN O3 8 Good 28 30 PPB
1:00 AM MFP NO2 1 Good 2 2 PPB
1:00 AM MFP O3 8 Good 28 30 PPB
1:00 AM NJH PM10 24 Good 12 13 µg/m3
1:00 AM NJH PM2.5 24 Good 19 3 µg/m3
1:00 AM NREL O3 8 Good 33 36 PPB
1:00 AM PAG PM10 24 Good 4 4 µg/m3
1:00 AM PAG PM2.5 24 Good 7 1 µg/m3
1:00 AM PAL O3 8 Good 28 30 PPB
1:00 AM PFS PM10 24 Good 11 12 µg/m3
1:00 AM PFS PM2.5 24 Good 14 2 µg/m3
1:00 AM PMS PM2.5 24 Good 23 4 µg/m3
1:00 AM PWES O3 8 Good 30 32 PPB
1:00 AM RFN NO2 1 Good 8 9 PPB
1:00 AM RFN O3 8 Good 28 30 PPB
1:00 AM RIFLO3 O3 8 Good 18 19 PPB
1:00 AM SSMB PM10 24 Good 6 7 µg/m3
1:00 AM SSMB PM2.5 24 Good 13 2 µg/m3
1:00 AM TEL PM10 24 Good 7 8 µg/m3
1:00 AM TEL PM2.5 24 Good 11 2 µg/m3
1:00 AM TIM NO2 1 Good 3 3 PPB
1:00 AM TIM O3 8 Good 21 23 PPB
1:00 AM TIM PM10 24 Good 17 18 µg/m3
1:00 AM TIM PM2.5 24 Good 22 4 µg/m3
1:00 AM WBY NO2 1 Good 8 8 PPB
1:00 AM WBY NO2 1 Good 8 8 PPB
1:00 AM WBY O3 8 Good 31 33 PPB
1:00 AM WBY PM10 24 Good 26 28 µg/m3
1:00 AM WBY PM2.5 24 Good 22 4 µg/m3

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