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AQI Calculations on 10/28/2021 1:00AM - 4:00AM

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.
4:00 AM BOU PM2.5 24 Good 10 2 µg/m3
4:00 AM CAMP CO 8 Good 5 0.4 PPM
4:00 AM CAMP NO2 1 Good 8 8 PPB
4:00 AM CAMP O3 8 Good 10 11 PPB
4:00 AM CAMP PM10 24 Good 7 8 µg/m3
4:00 AM CAMP PM2.5 24 Good 14 3 µg/m3
4:00 AM CHAT O3 8 Good 29 31 PPB
4:00 AM CHAT PM2.5 24 Good 6 2 µg/m3
4:00 AM FTC CO 8 Good 1 0.1 PPM
4:00 AM FTC O3 8 Good 36 39 PPB
4:00 AM FTCW O3 8 Good 38 41 PPB
4:00 AM HLD O3 8 Good 33 36 PPB
4:00 AM LNGM PM2.5 24 Good 15 4 µg/m3
4:00 AM NJH PM2.5 24 Good 15 4 µg/m3
4:00 AM NREL O3 8 Good 34 37 PPB
4:00 AM RFN O3 8 Good 31 34 PPB
4:00 AM WBY CO 8 Good 6 0.5 PPM
4:00 AM WBY NO2 1 Good 10 11 PPB
4:00 AM WBY O3 8 Good 7 8 PPB
4:00 AM WBY PM10 24 Good 34 37 µg/m3
3:00 AM ACAD O3 8 Good 25 27 PPB
3:00 AM ADB PM10 24 Good 21 23 µg/m3
3:00 AM ADB PM2.5 24 Good 23 6 µg/m3
3:00 AM ASPN O3 8 Good 28 30 PPB
3:00 AM ASPN2 PM10 24 Good 2 2 µg/m3
3:00 AM ASPN2 PM2.5 24 Good 4 1 µg/m3
3:00 AM AURE O3 8 Good 31 34 PPB
3:00 AM BHWK O3 8 Good 38 41 PPB
3:00 AM BOU PM2.5 24 Good 9 2 µg/m3
3:00 AM BOUR O3 8 Good 26 28 PPB
3:00 AM CAMP CO 8 Good 5 0.4 PPM
3:00 AM CAMP NO2 1 Good 6 6 PPB
3:00 AM CAMP NO2 1 Good 6 6 PPB
3:00 AM CAMP O3 8 Good 9 10 PPB
3:00 AM CAMP PM10 24 Good 7 8 µg/m3
3:00 AM CAMP PM2.5 24 Good 14 3 µg/m3
3:00 AM CASA CO 8 Good 5 0.4 PPM
3:00 AM CASA NO2 1 Good 19 20 PPB
3:00 AM CASA O3 8 Good 5 5 PPB
3:00 AM CASA PM10 24 Good 14 15 µg/m3
3:00 AM CASA PM2.5 24 Good 13 3 µg/m3
3:00 AM CCOL PM10 24 Good 2 2 µg/m3
3:00 AM CCOL PM2.5 24 Good 4 1 µg/m3
3:00 AM CHAT O3 8 Good 31 33 PPB
3:00 AM CHAT PM10 24 Good 6 7 µg/m3
3:00 AM CHAT PM2.5 24 Good 6 1 µg/m3
3:00 AM CTZ O3 8 Good 23 25 PPB
3:00 AM EVG O3 8 Good 42 45 PPB
3:00 AM FTC CO 8 Good 1 0.1 PPM
3:00 AM FTC O3 8 Good 36 39 PPB
3:00 AM FTCF PM10 24 Good 7 8 µg/m3
3:00 AM FTCF PM2.5 24 Good 5 1 µg/m3
3:00 AM FTCW O3 8 Good 38 41 PPB
3:00 AM GJPB PM10 24 Good 6 6 µg/m3
3:00 AM GJPB PM2.5 24 Good 18 4 µg/m3
3:00 AM GREH PM10 24 Good 9 10 µg/m3
3:00 AM GREH PM2.5 24 Good 6 2 µg/m3
3:00 AM GRET CO 8 Good 1 0.1 PPM
3:00 AM GRET O3 8 Good 35 38 PPB
3:00 AM H24 CO 8 Good 1 0.1 PPM
3:00 AM HLD O3 8 Good 34 37 PPB
3:00 AM I25DEN CO 8 Good 2 0.2 PPM
3:00 AM I25DEN PM10 24 Good 7 8 µg/m3
3:00 AM I25DEN PM2.5 24 Good 9 2 µg/m3
3:00 AM I25GLO NO2 1 Good 10 11 PPB
3:00 AM I25GLO PM10 24 Good 15 16 µg/m3
3:00 AM I25GLO PM2.5 24 Good 19 5 µg/m3
3:00 AM LNGM PM10 24 Good 14 15 µg/m3
3:00 AM LNGM PM2.5 24 Good 15 4 µg/m3
3:00 AM MAN O3 8 Good 40 43 PPB
3:00 AM NJH PM10 24 Good 12 13 µg/m3
3:00 AM NJH PM2.5 24 Good 15 4 µg/m3
3:00 AM NREL O3 8 Good 35 38 PPB
3:00 AM PAL O3 8 Good 18 19 PPB
3:00 AM PAO O3 8 Good 37 40 PPB
3:00 AM RFN NO2 1 Good 4 4 PPB
3:00 AM RFN O3 8 Good 33 36 PPB
3:00 AM RIFL PM2.5 24 Good 12 3 µg/m3
3:00 AM RIFLO3 O3 8 Good 12 13 PPB
3:00 AM SWAN CO 8 Good 3 0.3 PPM
3:00 AM SWAN NO2 1 Good 17 18 PPB
3:00 AM SWAN PM10 24 Good 21 23 µg/m3
3:00 AM SWAN PM2.5 24 Good 20 5 µg/m3
3:00 AM WBY CO 8 Good 6 0.5 PPM
3:00 AM WBY NO2 1 Good 5 5 PPB
3:00 AM WBY NO2 1 Good 5 5 PPB
3:00 AM WBY O3 8 Good 6 7 PPB
3:00 AM WBY PM10 24 Good 34 37 µg/m3
2:00 AM ACAD O3 8 Good 26 28 PPB
2:00 AM ADB PM10 24 Good 21 23 µg/m3
2:00 AM ADB PM2.5 24 Good 24 6 µg/m3
2:00 AM ASPN O3 8 Good 30 32 PPB
2:00 AM ASPN2 PM10 24 Good 2 2 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 4 1 µg/m3
2:00 AM AURE O3 8 Good 31 33 PPB
2:00 AM BHWK O3 8 Good 38 41 PPB
2:00 AM BOU PM2.5 24 Good 9 2 µg/m3
2:00 AM BOUR O3 8 Good 27 29 PPB
2:00 AM CAMP CO 8 Good 5 0.4 PPM
2:00 AM CAMP NO2 1 Good 7 7 PPB
2:00 AM CAMP NO2 1 Good 7 7 PPB
2:00 AM CAMP O3 8 Good 10 11 PPB
2:00 AM CAMP PM10 24 Good 7 8 µg/m3
2:00 AM CAMP PM2.5 24 Good 14 3 µg/m3
2:00 AM CASA CO 8 Good 5 0.4 PPM
2:00 AM CASA NO2 1 Good 14 15 PPB
2:00 AM CASA O3 8 Good 6 6 PPB
2:00 AM CASA PM10 24 Good 13 14 µg/m3
2:00 AM CASA PM2.5 24 Good 13 3 µg/m3
2:00 AM CCOL PM10 24 Good 2 2 µg/m3
2:00 AM CCOL PM2.5 24 Good 5 1 µg/m3
2:00 AM CHAT O3 8 Good 32 35 PPB
2:00 AM CHAT PM10 24 Good 6 7 µg/m3
2:00 AM CHAT PM2.5 24 Good 6 2 µg/m3
2:00 AM CTZ O3 8 Good 23 25 PPB
2:00 AM EVG O3 8 Good 43 46 PPB
2:00 AM FTC CO 8 Good 1 0.1 PPM
2:00 AM FTC O3 8 Good 36 39 PPB
2:00 AM FTCF PM10 24 Good 7 8 µg/m3
2:00 AM FTCF PM2.5 24 Good 5 1 µg/m3
2:00 AM FTCW O3 8 Good 38 41 PPB
2:00 AM GJPB PM10 24 Good 6 6 µg/m3
2:00 AM GJPB PM2.5 24 Good 17 4 µg/m3
2:00 AM GREH PM10 24 Good 9 10 µg/m3
2:00 AM GREH PM2.5 24 Good 6 2 µg/m3
2:00 AM GRET CO 8 Good 1 0.1 PPM
2:00 AM GRET O3 8 Good 35 38 PPB
2:00 AM H24 CO 8 Good 1 0.1 PPM
2:00 AM HLD O3 8 Good 35 38 PPB
2:00 AM I25DEN CO 8 Good 2 0.2 PPM
2:00 AM I25DEN PM10 24 Good 8 9 µg/m3
2:00 AM I25DEN PM2.5 24 Good 9 2 µg/m3
2:00 AM I25GLO NO2 1 Good 8 9 PPB
2:00 AM I25GLO PM10 24 Good 16 17 µg/m3
2:00 AM I25GLO PM2.5 24 Good 19 5 µg/m3
2:00 AM LNGM PM10 24 Good 14 15 µg/m3
2:00 AM LNGM PM2.5 24 Good 14 3 µg/m3
2:00 AM MAN O3 8 Good 41 44 PPB
2:00 AM NJH PM10 24 Good 12 13 µg/m3
2:00 AM NJH PM2.5 24 Good 15 4 µg/m3
2:00 AM NREL O3 8 Good 37 40 PPB
2:00 AM PAL O3 8 Good 20 22 PPB
2:00 AM PAO O3 8 Good 37 40 PPB
2:00 AM RFN NO2 1 Good 5 5 PPB
2:00 AM RFN O3 8 Good 35 38 PPB
2:00 AM RIFL PM2.5 24 Good 12 3 µg/m3
2:00 AM RIFLO3 O3 8 Good 13 14 PPB
2:00 AM SWAN CO 8 Good 3 0.3 PPM
2:00 AM SWAN NO2 1 Good 11 12 PPB
2:00 AM SWAN PM10 24 Good 21 23 µg/m3
2:00 AM SWAN PM2.5 24 Good 20 5 µg/m3
2:00 AM WBY CO 8 Good 6 0.5 PPM
2:00 AM WBY NO2 1 Good 3 3 PPB
2:00 AM WBY NO2 1 Good 3 3 PPB
2:00 AM WBY O3 8 Good 6 7 PPB
2:00 AM WBY PM10 24 Good 34 37 µg/m3
1:00 AM ACAD O3 8 Good 28 30 PPB
1:00 AM ADB PM10 24 Good 21 23 µg/m3
1:00 AM ADB PM2.5 24 Good 24 6 µg/m3
1:00 AM ASPN O3 8 Good 31 33 PPB
1:00 AM ASPN2 PM10 24 Good 1 1 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 4 1 µg/m3
1:00 AM AURE O3 8 Good 31 34 PPB
1:00 AM BHWK O3 8 Good 38 41 PPB
1:00 AM BOU PM2.5 24 Good 9 2 µg/m3
1:00 AM BOUR O3 8 Good 28 30 PPB
1:00 AM CAMP CO 8 Good 5 0.4 PPM
1:00 AM CAMP NO2 1 Good 37 39 PPB
1:00 AM CAMP NO2 1 Good 37 39 PPB
1:00 AM CAMP O3 8 Good 11 12 PPB
1:00 AM CAMP PM10 24 Good 7 8 µg/m3
1:00 AM CAMP PM2.5 24 Good 14 3 µg/m3
1:00 AM CASA CO 8 Good 5 0.4 PPM
1:00 AM CASA NO2 1 Good 32 34 PPB
1:00 AM CASA O3 8 Good 7 8 PPB
1:00 AM CASA PM10 24 Good 13 14 µg/m3
1:00 AM CASA PM2.5 24 Good 13 3 µg/m3
1:00 AM CCOL PM10 24 Good 2 2 µg/m3
1:00 AM CCOL PM2.5 24 Good 5 1 µg/m3
1:00 AM CHAT O3 8 Good 34 37 PPB
1:00 AM CHAT PM10 24 Good 6 7 µg/m3
1:00 AM CHAT PM2.5 24 Good 6 2 µg/m3
1:00 AM CTZ O3 8 Good 23 25 PPB
1:00 AM EVG O3 8 Good 43 46 PPB
1:00 AM FTC CO 8 Good 1 0.1 PPM
1:00 AM FTC O3 8 Good 36 39 PPB
1:00 AM FTCF PM10 24 Good 7 8 µg/m3
1:00 AM FTCF PM2.5 24 Good 5 1 µg/m3
1:00 AM FTCW O3 8 Good 38 41 PPB
1:00 AM GJPB PM10 24 Good 6 6 µg/m3
1:00 AM GJPB PM2.5 24 Good 17 4 µg/m3
1:00 AM GREH PM10 24 Good 9 10 µg/m3
1:00 AM GREH PM2.5 24 Good 6 2 µg/m3
1:00 AM GRET CO 8 Good 1 0.1 PPM
1:00 AM GRET O3 8 Good 36 39 PPB
1:00 AM H24 CO 8 Good 1 0.1 PPM
1:00 AM HLD O3 8 Good 36 39 PPB
1:00 AM I25DEN CO 8 Good 3 0.3 PPM
1:00 AM I25DEN PM10 24 Good 7 8 µg/m3
1:00 AM I25DEN PM2.5 24 Good 9 2 µg/m3
1:00 AM I25GLO NO2 1 Good 42 44 PPB
1:00 AM I25GLO PM10 24 Good 16 17 µg/m3
1:00 AM I25GLO PM2.5 24 Good 20 5 µg/m3
1:00 AM LNGM PM10 24 Good 14 15 µg/m3
1:00 AM LNGM PM2.5 24 Good 14 3 µg/m3
1:00 AM MAN O3 8 Good 42 45 PPB
1:00 AM NJH PM10 24 Good 11 12 µg/m3
1:00 AM NJH PM2.5 24 Good 15 4 µg/m3
1:00 AM NREL O3 8 Good 38 41 PPB
1:00 AM PAL O3 8 Good 22 24 PPB
1:00 AM PAO O3 8 Good 37 40 PPB
1:00 AM RFN O3 8 Good 36 39 PPB
1:00 AM RIFL PM2.5 24 Good 12 3 µg/m3
1:00 AM RIFLO3 O3 8 Good 15 16 PPB
1:00 AM SWAN CO 8 Good 5 0.4 PPM
1:00 AM SWAN NO2 1 Good 31 33 PPB
1:00 AM SWAN PM10 24 Good 21 23 µg/m3
1:00 AM SWAN PM2.5 24 Good 20 5 µg/m3
1:00 AM WBY CO 8 Good 6 0.5 PPM
1:00 AM WBY NO2 1 Good 27 29 PPB
1:00 AM WBY NO2 1 Good 27 29 PPB
1:00 AM WBY O3 8 Good 8 9 PPB
1:00 AM WBY PM10 24 Good 34 37 µg/m3
1:00 AM WBY SO2 1 Good 1 1 PPB
1:00 AM WBY SO2 1 Good 1 1 PPB

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