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AQI Calculations on 03/27/2026 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 30 32 PPB
2:00 AM ACC PM10 24 Good 36 39 µg/m3
2:00 AM ACC PM2.5 24 Moderate 57 12 µg/m3
2:00 AM ADB PM10 24 Moderate 71 96 µg/m3
2:00 AM ADB PM2.5 24 Moderate 69 18 µg/m3
2:00 AM ALA PM10 24 Good 48 52 µg/m3
2:00 AM ALA PM2.5 24 Good 43 7 µg/m3
2:00 AM ASPN O3 8 Good 29 31 PPB
2:00 AM ASPN2 PM10 24 Good 20 22 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 20 3 µg/m3
2:00 AM AURE O3 8 Good 35 38 PPB
2:00 AM BHWK O3 8 Good 37 40 PPB
2:00 AM BOU PM10 24 Good 37 40 µg/m3
2:00 AM BOU PM2.5 24 Good 37 6 µg/m3
2:00 AM BOUR O3 8 Good 31 34 PPB
2:00 AM CAMP NO2 1 Good 2 2 PPB
2:00 AM CAMP NO2 1 Good 2 2 PPB
2:00 AM CAMP O3 8 Good 31 34 PPB
2:00 AM CAMP PM10 24 Good 33 36 µg/m3
2:00 AM CAMP PM2.5 24 Moderate 57 12 µg/m3
2:00 AM CAN PM10 24 Moderate 52 57 µg/m3
2:00 AM CAN PM2.5 24 Good 37 6 µg/m3
2:00 AM CASA NO2 1 Good 7 7 PPB
2:00 AM CASA O3 8 Good 31 33 PPB
2:00 AM CASA PM10 24 Moderate 52 57 µg/m3
2:00 AM CASA PM2.5 24 Moderate 59 13 µg/m3
2:00 AM CCOL PM10 24 Good 42 45 µg/m3
2:00 AM CCOL PM2.5 24 Good 43 7 µg/m3
2:00 AM CHAT O3 8 Good 35 38 PPB
2:00 AM CHAT PM10 24 Good 46 50 µg/m3
2:00 AM CHAT PM2.5 24 Moderate 67 17 µg/m3
2:00 AM CTZ O3 8 Good 27 29 PPB
2:00 AM DELT PM10 24 Good 43 46 µg/m3
2:00 AM DELT PM2.5 24 Good 32 5 µg/m3
2:00 AM DELT PM2.5 24 Good 32 5 µg/m3
2:00 AM EVG O3 8 Good 37 40 PPB
2:00 AM FOS NO2 1 Good 1 1 PPB
2:00 AM FOS O3 8 Good 33 36 PPB
2:00 AM FTC CO 8 Good 1 0.1 PPM
2:00 AM FTC O3 8 Good 34 37 PPB
2:00 AM FTCF PM10 24 Good 24 26 µg/m3
2:00 AM FTCF PM2.5 24 Good 24 4 µg/m3
2:00 AM FTCW O3 8 Good 34 37 PPB
2:00 AM GJPB PM10 24 Good 22 24 µg/m3
2:00 AM GJPB PM2.5 24 Good 31 5 µg/m3
2:00 AM GREH PM10 24 Good 24 26 µg/m3
2:00 AM GREH PM2.5 24 Good 27 4 µg/m3
2:00 AM GRET CO 8 Good 1 0.1 PPM
2:00 AM GRET O3 8 Good 34 37 PPB
2:00 AM HLD O3 8 Good 35 38 PPB
2:00 AM I25DEN CO 8 Good 1 0.1 PPM
2:00 AM I25DEN NO2 1 Good 2 2 PPB
2:00 AM I25DEN PM10 24 Moderate 54 61 µg/m3
2:00 AM I25DEN PM2.5 24 Moderate 63 15 µg/m3
2:00 AM I25GLO NO2 1 Good 1 1 PPB
2:00 AM I25GLO PM10 24 Moderate 51 55 µg/m3
2:00 AM I25GLO PM2.5 24 Moderate 59 13 µg/m3
2:00 AM LAST NO2 1 Good 2 2 PPB
2:00 AM LAST O3 8 Good 33 36 PPB
2:00 AM LMB PM10 24 Moderate 53 59 µg/m3
2:00 AM LMB PM2.5 24 Good 37 6 µg/m3
2:00 AM LNGM PM10 24 Good 36 39 µg/m3
2:00 AM LNGM PM2.5 24 Good 33 6 µg/m3
2:00 AM MAN O3 8 Good 32 35 PPB
2:00 AM MFP O3 8 Good 35 38 PPB
2:00 AM NJH PM10 24 Moderate 51 55 µg/m3
2:00 AM NJH PM2.5 24 Moderate 63 15 µg/m3
2:00 AM NREL O3 8 Good 35 38 PPB
2:00 AM PAG PM10 24 Good 26 28 µg/m3
2:00 AM PAG PM2.5 24 Good 21 3 µg/m3
2:00 AM PAL O3 8 Good 43 46 PPB
2:00 AM PFS PM10 24 Good 37 40 µg/m3
2:00 AM PFS PM2.5 24 Good 34 6 µg/m3
2:00 AM PMS PM2.5 24 Good 43 7 µg/m3
2:00 AM PWES O3 8 Good 33 36 PPB
2:00 AM RFN O3 8 Good 35 38 PPB
2:00 AM RIFL PM2.5 24 Good 18 3 µg/m3
2:00 AM RIFLO3 O3 8 Good 37 40 PPB
2:00 AM TEL PM10 24 Good 27 29 µg/m3
2:00 AM TEL PM2.5 24 Good 22 4 µg/m3
2:00 AM TIM NO2 1 Good 1 1 PPB
2:00 AM TIM O3 8 Good 34 37 PPB
2:00 AM TIM PM10 24 Good 25 27 µg/m3
2:00 AM TIM PM2.5 24 Good 20 3 µg/m3
2:00 AM WBY NO2 1 Good 1 1 PPB
2:00 AM WBY NO2 1 Good 1 1 PPB
2:00 AM WBY O3 8 Good 35 38 PPB
2:00 AM WBY PM10 24 Moderate 58 69 µg/m3
2:00 AM WBY PM2.5 24 Moderate 61 14 µg/m3
1:00 AM ACAD O3 8 Good 31 33 PPB
1:00 AM ACC PM10 24 Good 37 40 µg/m3
1:00 AM ACC PM2.5 24 Moderate 58 12 µg/m3
1:00 AM ADB PM10 24 Moderate 71 96 µg/m3
1:00 AM ADB PM2.5 24 Moderate 69 18 µg/m3
1:00 AM ALA PM10 24 Good 47 51 µg/m3
1:00 AM ALA PM2.5 24 Good 41 7 µg/m3
1:00 AM ASPN O3 8 Good 31 33 PPB
1:00 AM ASPN2 PM10 24 Good 20 22 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 19 3 µg/m3
1:00 AM AURE O3 8 Good 35 38 PPB
1:00 AM BHWK O3 8 Good 39 42 PPB
1:00 AM BOU PM10 24 Good 36 39 µg/m3
1:00 AM BOU PM2.5 24 Good 37 6 µg/m3
1:00 AM BOUR O3 8 Good 32 35 PPB
1:00 AM CAMP NO2 1 Good 2 2 PPB
1:00 AM CAMP NO2 1 Good 2 2 PPB
1:00 AM CAMP O3 8 Good 33 36 PPB
1:00 AM CAMP PM10 24 Good 33 36 µg/m3
1:00 AM CAMP PM2.5 24 Moderate 57 12 µg/m3
1:00 AM CAN PM10 24 Moderate 52 57 µg/m3
1:00 AM CAN PM2.5 24 Good 38 6 µg/m3
1:00 AM CASA NO2 1 Good 7 7 PPB
1:00 AM CASA O3 8 Good 32 35 PPB
1:00 AM CASA PM10 24 Moderate 52 57 µg/m3
1:00 AM CASA PM2.5 24 Moderate 59 13 µg/m3
1:00 AM CCOL PM10 24 Good 43 46 µg/m3
1:00 AM CCOL PM2.5 24 Good 43 7 µg/m3
1:00 AM CHAT O3 8 Good 36 39 PPB
1:00 AM CHAT PM10 24 Good 46 50 µg/m3
1:00 AM CHAT PM2.5 24 Moderate 67 17 µg/m3
1:00 AM CTZ O3 8 Good 31 33 PPB
1:00 AM DELT PM10 24 Good 43 46 µg/m3
1:00 AM DELT PM2.5 24 Good 33 6 µg/m3
1:00 AM DELT PM2.5 24 Good 33 6 µg/m3
1:00 AM EVG O3 8 Good 40 43 PPB
1:00 AM FOS O3 8 Good 33 36 PPB
1:00 AM FTC CO 8 Good 1 0.1 PPM
1:00 AM FTC O3 8 Good 34 37 PPB
1:00 AM FTCF PM10 24 Good 24 26 µg/m3
1:00 AM FTCF PM2.5 24 Good 24 4 µg/m3
1:00 AM FTCW O3 8 Good 34 37 PPB
1:00 AM GJPB PM10 24 Good 22 24 µg/m3
1:00 AM GJPB PM2.5 24 Good 32 5 µg/m3
1:00 AM GREH PM10 24 Good 24 26 µg/m3
1:00 AM GREH PM2.5 24 Good 28 5 µg/m3
1:00 AM GRET CO 8 Good 1 0.1 PPM
1:00 AM GRET O3 8 Good 35 38 PPB
1:00 AM HLD O3 8 Good 36 39 PPB
1:00 AM I25DEN CO 8 Good 1 0.1 PPM
1:00 AM I25DEN NO2 1 Good 3 3 PPB
1:00 AM I25DEN PM10 24 Moderate 54 61 µg/m3
1:00 AM I25DEN PM2.5 24 Moderate 63 15 µg/m3
1:00 AM I25GLO NO2 1 Good 1 1 PPB
1:00 AM I25GLO PM10 24 Moderate 51 56 µg/m3
1:00 AM I25GLO PM2.5 24 Moderate 59 13 µg/m3
1:00 AM LAST NO2 1 Good 1 1 PPB
1:00 AM LAST O3 8 Good 34 37 PPB
1:00 AM LMB PM10 24 Moderate 53 60 µg/m3
1:00 AM LMB PM2.5 24 Good 39 7 µg/m3
1:00 AM LNGM PM10 24 Good 36 39 µg/m3
1:00 AM LNGM PM2.5 24 Good 34 6 µg/m3
1:00 AM MAN O3 8 Good 34 37 PPB
1:00 AM MFP O3 8 Good 35 38 PPB
1:00 AM NJH PM10 24 Moderate 51 56 µg/m3
1:00 AM NJH PM2.5 24 Moderate 63 15 µg/m3
1:00 AM NREL O3 8 Good 38 41 PPB
1:00 AM PAG PM10 24 Good 26 28 µg/m3
1:00 AM PAG PM2.5 24 Good 21 3 µg/m3
1:00 AM PAL O3 8 Good 43 46 PPB
1:00 AM PFS PM10 24 Good 37 40 µg/m3
1:00 AM PFS PM2.5 24 Good 34 6 µg/m3
1:00 AM PMS PM2.5 24 Good 44 7 µg/m3
1:00 AM PWES O3 8 Good 34 37 PPB
1:00 AM RFN NO2 1 Good 1 1 PPB
1:00 AM RFN O3 8 Good 38 41 PPB
1:00 AM RIFL PM2.5 24 Good 18 3 µg/m3
1:00 AM RIFLO3 O3 8 Good 37 40 PPB
1:00 AM TEL PM10 24 Good 26 28 µg/m3
1:00 AM TEL PM2.5 24 Good 22 4 µg/m3
1:00 AM TIM NO2 1 Good 1 1 PPB
1:00 AM TIM O3 8 Good 34 37 PPB
1:00 AM TIM PM10 24 Good 25 27 µg/m3
1:00 AM TIM PM2.5 24 Good 20 3 µg/m3
1:00 AM WBY NO2 1 Good 1 1 PPB
1:00 AM WBY NO2 1 Good 1 1 PPB
1:00 AM WBY O3 8 Good 37 40 PPB
1:00 AM WBY PM10 24 Moderate 58 69 µg/m3
1:00 AM WBY PM2.5 24 Moderate 61 14 µg/m3

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