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AQI Calculations on 07/23/2026 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 18 19 µg/m3
3:00 AM ACC PM2.5 24 Good 33 6 µg/m3
3:00 AM ADB PM10 24 Good 37 40 µg/m3
3:00 AM ADB PM2.5 24 Good 44 8 µg/m3
3:00 AM ALA PM10 24 Good 19 20 µg/m3
3:00 AM ALA PM2.5 24 Good 23 4 µg/m3
3:00 AM ASPN O3 8 Good 13 14 PPB
3:00 AM ASPN2 PM10 24 Good 13 14 µg/m3
3:00 AM ASPN2 PM2.5 24 Good 22 4 µg/m3
3:00 AM AURE O3 8 Good 34 37 PPB
3:00 AM BHWK O3 8 Good 32 35 PPB
3:00 AM BOU PM10 24 Good 19 21 µg/m3
3:00 AM BOU PM2.5 24 Good 37 6 µg/m3
3:00 AM BOUR O3 8 Good 32 35 PPB
3:00 AM CAMP NO2 1 Good 10 11 PPB
3:00 AM CAMP NO2 1 Good 10 11 PPB
3:00 AM CAMP O3 8 Good 37 40 PPB
3:00 AM CAMP PM10 24 Good 24 26 µg/m3
3:00 AM CAMP PM2.5 24 Good 39 7 µg/m3
3:00 AM CAMP SO2 1 Good 1 1 PPB
3:00 AM CAMP SO2 1 Good 1 1 PPB
3:00 AM CAN PM10 24 Good 32 35 µg/m3
3:00 AM CAN PM2.5 24 Good 43 7 µg/m3
3:00 AM CASA CO 8 Good 1 0.1 PPM
3:00 AM CASA NO2 1 Good 12 13 PPB
3:00 AM CASA O3 8 Good 32 35 PPB
3:00 AM CASA PM10 24 Good 25 27 µg/m3
3:00 AM CASA PM2.5 24 Good 39 7 µg/m3
3:00 AM CCOL PM10 24 Good 35 38 µg/m3
3:00 AM CCOL PM2.5 24 Good 44 7 µg/m3
3:00 AM CHAT O3 8 Good 22 24 PPB
3:00 AM CHAT PM10 24 Good 23 25 µg/m3
3:00 AM CHAT PM2.5 24 Good 34 6 µg/m3
3:00 AM CTZ O3 8 Good 31 33 PPB
3:00 AM DELT PM10 24 Good 12 13 µg/m3
3:00 AM DELT PM2.5 24 Good 21 3 µg/m3
3:00 AM DELT PM2.5 24 Good 21 3 µg/m3
3:00 AM EVG O3 8 Good 26 28 PPB
3:00 AM FOS NO2 1 Good 10 11 PPB
3:00 AM FOS O3 8 Good 33 36 PPB
3:00 AM FTC CO 8 Good 1 0.1 PPM
3:00 AM FTC O3 8 Good 37 40 PPB
3:00 AM FTCF PM10 24 Good 26 28 µg/m3
3:00 AM FTCF PM2.5 24 Moderate 53 10 µg/m3
3:00 AM FTCW O3 8 Good 30 32 PPB
3:00 AM GREH PM10 24 Good 28 30 µg/m3
3:00 AM GREH PM2.5 24 Good 49 8 µg/m3
3:00 AM GRET CO 8 Good 1 0.1 PPM
3:00 AM GRET O3 8 Good 40 43 PPB
3:00 AM HLD O3 8 Good 35 38 PPB
3:00 AM I25DEN CO 8 Good 2 0.2 PPM
3:00 AM I25DEN NO2 1 Good 15 16 PPB
3:00 AM I25DEN PM10 24 Good 26 28 µg/m3
3:00 AM I25DEN PM2.5 24 Good 43 7 µg/m3
3:00 AM I25GLO NO2 1 Good 21 22 PPB
3:00 AM I25GLO PM10 24 Good 32 35 µg/m3
3:00 AM I25GLO PM2.5 24 Good 43 7 µg/m3
3:00 AM LAST NO2 1 Good 8 9 PPB
3:00 AM LAST O3 8 Good 35 38 PPB
3:00 AM LMB PM10 24 Moderate 54 62 µg/m3
3:00 AM LMB PM2.5 24 Moderate 62 15 µg/m3
3:00 AM LNGM PM10 24 Good 22 24 µg/m3
3:00 AM LNGM PM2.5 24 Moderate 51 9 µg/m3
3:00 AM MAN O3 8 Good 28 30 PPB
3:00 AM MFP NO2 1 Good 7 7 PPB
3:00 AM MFP O3 8 Good 39 42 PPB
3:00 AM NJH PM10 24 Good 23 25 µg/m3
3:00 AM NJH PM2.5 24 Good 38 6 µg/m3
3:00 AM NREL O3 8 Good 37 40 PPB
3:00 AM PAG PM10 24 Good 12 13 µg/m3
3:00 AM PAG PM2.5 24 Good 19 3 µg/m3
3:00 AM PAL O3 8 Good 41 44 PPB
3:00 AM PFS PM10 24 Good 43 46 µg/m3
3:00 AM PFS PM2.5 24 Good 46 8 µg/m3
3:00 AM PMS PM2.5 24 Good 49 8 µg/m3
3:00 AM PWES O3 8 Good 39 42 PPB
3:00 AM RFN NO2 1 Good 3 3 PPB
3:00 AM RFN O3 8 Good 38 41 PPB
3:00 AM RIFLO3 O3 8 Good 40 43 PPB
3:00 AM SSMB PM10 24 Good 18 19 µg/m3
3:00 AM SSMB PM2.5 24 Good 31 5 µg/m3
3:00 AM TEL PM10 24 Good 12 13 µg/m3
3:00 AM TEL PM2.5 24 Good 16 2 µg/m3
3:00 AM TIM NO2 1 Good 9 10 PPB
3:00 AM TIM O3 8 Good 35 38 PPB
3:00 AM TIM PM10 24 Good 23 25 µg/m3
3:00 AM TIM PM2.5 24 Good 47 8 µg/m3
3:00 AM WBY NO2 1 Good 18 19 PPB
3:00 AM WBY NO2 1 Good 18 19 PPB
3:00 AM WBY O3 8 Good 31 33 PPB
3:00 AM WBY PM10 24 Good 24 26 µg/m3
3:00 AM WBY PM2.5 24 Good 38 6 µg/m3
2:00 AM ACAD O3 8 Good 21 23 PPB
2:00 AM ACC PM10 24 Good 18 19 µg/m3
2:00 AM ACC PM2.5 24 Good 34 6 µg/m3
2:00 AM ADB PM10 24 Good 37 40 µg/m3
2:00 AM ADB PM2.5 24 Good 45 8 µg/m3
2:00 AM ALA PM10 24 Good 18 19 µg/m3
2:00 AM ALA PM2.5 24 Good 23 4 µg/m3
2:00 AM ASPN O3 8 Good 14 15 PPB
2:00 AM ASPN2 PM10 24 Good 13 14 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 23 4 µg/m3
2:00 AM AURE O3 8 Good 36 39 PPB
2:00 AM BHWK O3 8 Good 32 35 PPB
2:00 AM BOU PM10 24 Good 19 21 µg/m3
2:00 AM BOU PM2.5 24 Good 38 6 µg/m3
2:00 AM BOUR O3 8 Good 36 39 PPB
2:00 AM CAMP NO2 1 Good 10 11 PPB
2:00 AM CAMP NO2 1 Good 10 11 PPB
2:00 AM CAMP O3 8 Good 40 43 PPB
2:00 AM CAMP PM10 24 Good 24 26 µg/m3
2:00 AM CAMP PM2.5 24 Good 39 7 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 34 37 µg/m3
2:00 AM CAN PM2.5 24 Good 46 8 µg/m3
2:00 AM CASA CO 8 Good 1 0.1 PPM
2:00 AM CASA NO2 1 Good 10 11 PPB
2:00 AM CASA O3 8 Good 35 38 PPB
2:00 AM CASA PM10 24 Good 25 27 µg/m3
2:00 AM CASA PM2.5 24 Good 40 7 µg/m3
2:00 AM CCOL PM10 24 Good 36 39 µg/m3
2:00 AM CCOL PM2.5 24 Good 46 8 µg/m3
2:00 AM CHAT O3 8 Good 24 26 PPB
2:00 AM CHAT PM10 24 Good 24 26 µg/m3
2:00 AM CHAT PM2.5 24 Good 34 6 µg/m3
2:00 AM CTZ O3 8 Good 34 37 PPB
2:00 AM DELT PM10 24 Good 12 13 µg/m3
2:00 AM DELT PM2.5 24 Good 21 3 µg/m3
2:00 AM DELT PM2.5 24 Good 21 3 µg/m3
2:00 AM EVG O3 8 Good 29 31 PPB
2:00 AM FOS NO2 1 Good 10 11 PPB
2:00 AM FOS O3 8 Good 38 41 PPB
2:00 AM FTC CO 8 Good 1 0.1 PPM
2:00 AM FTC O3 8 Good 41 44 PPB
2:00 AM FTCF PM10 24 Good 26 28 µg/m3
2:00 AM FTCF PM2.5 24 Moderate 53 10 µg/m3
2:00 AM FTCW O3 8 Good 33 36 PPB
2:00 AM GREH PM10 24 Good 28 30 µg/m3
2:00 AM GREH PM2.5 24 Moderate 51 9 µg/m3
2:00 AM GRET CO 8 Good 1 0.1 PPM
2:00 AM GRET O3 8 Good 44 48 PPB
2:00 AM HLD O3 8 Good 38 41 PPB
2:00 AM I25DEN CO 8 Good 2 0.2 PPM
2:00 AM I25DEN NO2 1 Good 16 17 PPB
2:00 AM I25DEN PM10 24 Good 26 28 µg/m3
2:00 AM I25DEN PM2.5 24 Good 43 7 µg/m3
2:00 AM I25GLO NO2 1 Good 17 18 PPB
2:00 AM I25GLO PM10 24 Good 32 35 µg/m3
2:00 AM I25GLO PM2.5 24 Good 43 7 µg/m3
2:00 AM LAST NO2 1 Good 8 9 PPB
2:00 AM LAST O3 8 Good 39 42 PPB
2:00 AM LMB PM10 24 Moderate 55 63 µg/m3
2:00 AM LMB PM2.5 24 Moderate 62 15 µg/m3
2:00 AM LNGM PM10 24 Good 22 24 µg/m3
2:00 AM LNGM PM2.5 24 Moderate 51 9 µg/m3
2:00 AM MAN O3 8 Good 30 32 PPB
2:00 AM MFP NO2 1 Good 7 7 PPB
2:00 AM MFP O3 8 Good 43 46 PPB
2:00 AM NJH PM10 24 Good 23 25 µg/m3
2:00 AM NJH PM2.5 24 Good 38 6 µg/m3
2:00 AM NREL O3 8 Good 40 43 PPB
2:00 AM PAG PM10 24 Good 12 13 µg/m3
2:00 AM PAG PM2.5 24 Good 19 3 µg/m3
2:00 AM PAL O3 8 Good 43 46 PPB
2:00 AM PFS PM10 24 Good 44 47 µg/m3
2:00 AM PFS PM2.5 24 Good 47 8 µg/m3
2:00 AM PMS PM2.5 24 Good 49 8 µg/m3
2:00 AM PWES O3 8 Good 40 43 PPB
2:00 AM RFN NO2 1 Good 4 4 PPB
2:00 AM RFN O3 8 Good 41 44 PPB
2:00 AM RIFLO3 O3 8 Good 43 46 PPB
2:00 AM SSMB PM10 24 Good 18 19 µg/m3
2:00 AM SSMB PM2.5 24 Good 32 5 µg/m3
2:00 AM TEL PM10 24 Good 12 13 µg/m3
2:00 AM TEL PM2.5 24 Good 16 2 µg/m3
2:00 AM TIM NO2 1 Good 8 9 PPB
2:00 AM TIM O3 8 Good 39 42 PPB
2:00 AM TIM PM10 24 Good 23 25 µg/m3
2:00 AM TIM PM2.5 24 Good 47 8 µg/m3
2:00 AM WBY NO2 1 Good 12 13 PPB
2:00 AM WBY NO2 1 Good 12 13 PPB
2:00 AM WBY O3 8 Good 33 36 PPB
2:00 AM WBY PM10 24 Good 25 27 µg/m3
2:00 AM WBY PM2.5 24 Good 38 6 µg/m3
1:00 AM ACAD O3 8 Good 25 27 PPB
1:00 AM ACC PM10 24 Good 18 19 µg/m3
1:00 AM ACC PM2.5 24 Good 34 6 µg/m3
1:00 AM ADB PM10 24 Good 37 40 µg/m3
1:00 AM ADB PM2.5 24 Good 45 8 µg/m3
1:00 AM ALA PM10 24 Good 18 19 µg/m3
1:00 AM ALA PM2.5 24 Good 23 4 µg/m3
1:00 AM ASPN O3 8 Good 16 17 PPB
1:00 AM ASPN2 PM10 24 Good 14 15 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 23 4 µg/m3
1:00 AM AURE O3 8 Good 37 40 PPB
1:00 AM BHWK O3 8 Good 33 36 PPB
1:00 AM BOU PM10 24 Good 20 22 µg/m3
1:00 AM BOU PM2.5 24 Good 38 6 µg/m3
1:00 AM BOUR O3 8 Good 40 43 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 44 47 PPB
1:00 AM CAMP PM10 24 Good 24 26 µg/m3
1:00 AM CAMP PM2.5 24 Good 39 7 µg/m3
1:00 AM CAN PM10 24 Good 36 39 µg/m3
1:00 AM CAN PM2.5 24 Good 47 8 µg/m3
1:00 AM CASA CO 8 Good 1 0.1 PPM
1:00 AM CASA NO2 1 Good 7 7 PPB
1:00 AM CASA O3 8 Good 37 40 PPB
1:00 AM CASA PM10 24 Good 25 27 µg/m3
1:00 AM CASA PM2.5 24 Good 40 7 µg/m3
1:00 AM CCOL PM10 24 Good 38 41 µg/m3
1:00 AM CCOL PM2.5 24 Good 48 8 µg/m3
1:00 AM CHAT O3 8 Good 27 29 PPB
1:00 AM CHAT PM10 24 Good 24 26 µg/m3
1:00 AM CHAT PM2.5 24 Good 35 6 µg/m3
1:00 AM CTZ O3 8 Good 38 41 PPB
1:00 AM DELT PM10 24 Good 12 13 µg/m3
1:00 AM DELT PM2.5 24 Good 21 3 µg/m3
1:00 AM DELT PM2.5 24 Good 21 3 µg/m3
1:00 AM EVG O3 8 Good 32 35 PPB
1:00 AM FOS NO2 1 Good 12 13 PPB
1:00 AM FOS O3 8 Good 42 45 PPB
1:00 AM FTC CO 8 Good 1 0.1 PPM
1:00 AM FTC O3 8 Good 44 47 PPB
1:00 AM FTCF PM10 24 Good 25 27 µg/m3
1:00 AM FTCF PM2.5 24 Moderate 53 10 µg/m3
1:00 AM FTCW O3 8 Good 38 41 PPB
1:00 AM GREH PM10 24 Good 29 31 µg/m3
1:00 AM GREH PM2.5 24 Moderate 51 9 µg/m3
1:00 AM GRET CO 8 Good 1 0.1 PPM
1:00 AM GRET O3 8 Good 47 51 PPB
1:00 AM HLD O3 8 Good 41 44 PPB
1:00 AM I25DEN CO 8 Good 3 0.3 PPM
1:00 AM I25DEN NO2 1 Good 14 15 PPB
1:00 AM I25DEN PM10 24 Good 26 28 µg/m3
1:00 AM I25DEN PM2.5 24 Good 43 7 µg/m3
1:00 AM I25GLO NO2 1 Good 11 12 PPB
1:00 AM I25GLO PM10 24 Good 32 35 µg/m3
1:00 AM I25GLO PM2.5 24 Good 43 7 µg/m3
1:00 AM LAST NO2 1 Good 8 8 PPB
1:00 AM LAST O3 8 Good 44 47 PPB
1:00 AM LMB PM10 24 Moderate 55 63 µg/m3
1:00 AM LMB PM2.5 24 Moderate 62 15 µg/m3
1:00 AM LNGM PM10 24 Good 22 24 µg/m3
1:00 AM LNGM PM2.5 24 Good 50 9 µg/m3
1:00 AM MAN O3 8 Good 32 35 PPB
1:00 AM MFP NO2 1 Good 7 7 PPB
1:00 AM MFP O3 8 Good 46 50 PPB
1:00 AM NJH PM10 24 Good 23 25 µg/m3
1:00 AM NJH PM2.5 24 Good 38 6 µg/m3
1:00 AM NREL O3 8 Good 42 45 PPB
1:00 AM PAG PM10 24 Good 12 13 µg/m3
1:00 AM PAG PM2.5 24 Good 20 3 µg/m3
1:00 AM PAL O3 8 Good 44 47 PPB
1:00 AM PFS PM10 24 Good 45 49 µg/m3
1:00 AM PFS PM2.5 24 Good 48 8 µg/m3
1:00 AM PMS PM2.5 24 Good 49 8 µg/m3
1:00 AM PWES O3 8 Good 42 45 PPB
1:00 AM RFN NO2 1 Good 6 6 PPB
1:00 AM RFN O3 8 Good 44 48 PPB
1:00 AM RIFLO3 O3 8 Good 44 47 PPB
1:00 AM SSMB PM10 24 Good 18 19 µg/m3
1:00 AM SSMB PM2.5 24 Good 32 5 µg/m3
1:00 AM TEL PM10 24 Good 12 13 µg/m3
1:00 AM TEL PM2.5 24 Good 17 3 µg/m3
1:00 AM TIM NO2 1 Good 8 9 PPB
1:00 AM TIM O3 8 Good 42 45 PPB
1:00 AM TIM PM10 24 Good 23 25 µg/m3
1:00 AM TIM PM2.5 24 Good 47 8 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 35 38 PPB
1:00 AM WBY PM10 24 Good 25 27 µg/m3
1:00 AM WBY PM2.5 24 Good 38 6 µg/m3

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