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AQI Calculations on 11/20/2017 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.

Click on the column headings to sort data.

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 H24 SO2 1 Good 1 1 PPB
2:00 AM H24 SO2 1 Good 1 1 PPB
3:00 AM CAMP NO2 1 Good 13 14 PPB
3:00 AM CAMP NO2 1 Good 13 14 PPB
2:00 AM CAMP NO2 1 Good 18 19 PPB
2:00 AM CAMP NO2 1 Good 18 19 PPB
1:00 AM CAMP NO2 1 Good 19 20 PPB
1:00 AM CAMP NO2 1 Good 19 20 PPB
1:00 AM SWAN NO2 1 Good 23 24 PPB
2:00 AM SWAN NO2 1 Good 25 27 PPB
2:00 AM CASA NO2 1 Good 27 29 PPB
4:00 AM CASA NO2 1 Good 28 30 PPB
3:00 AM CASA NO2 1 Good 29 31 PPB
1:00 AM CASA NO2 1 Good 29 31 PPB
3:00 AM SWAN NO2 1 Good 30 32 PPB
4:00 AM CAMP NO2 1 Good 31 33 PPB
4:00 AM CAMP NO2 1 Good 31 33 PPB
3:00 AM I25GLO NO2 1 Good 33 35 PPB
4:00 AM SWAN NO2 1 Good 36 38 PPB
1:00 AM I25GLO NO2 1 Good 38 40 PPB
4:00 AM WBY NO2 1 Good 40 42 PPB
4:00 AM WBY NO2 1 Good 40 42 PPB
2:00 AM WBY NO2 1 Good 41 43 PPB
2:00 AM WBY NO2 1 Good 41 43 PPB
3:00 AM WBY NO2 1 Good 42 45 PPB
3:00 AM WBY NO2 1 Good 42 45 PPB
1:00 AM WBY NO2 1 Good 42 45 PPB
1:00 AM WBY NO2 1 Good 42 45 PPB
2:00 AM I25GLO NO2 1 Good 43 46 PPB
4:00 AM I25GLO NO2 1 Good 44 47 PPB
1:00 AM WBY CO 8 Good 1 0.1 PPM
4:00 AM CAMP CO 8 Good 2 0.2 PPM
4:00 AM H24 CO 8 Good 2 0.2 PPM
4:00 AM WBY CO 8 Good 2 0.2 PPM
3:00 AM CAMP CO 8 Good 2 0.2 PPM
3:00 AM H24 CO 8 Good 2 0.2 PPM
3:00 AM WBY CO 8 Good 2 0.2 PPM
2:00 AM H24 CO 8 Good 2 0.2 PPM
2:00 AM WBY CO 8 Good 2 0.2 PPM
4:00 AM CASA CO 8 Good 3 0.3 PPM
4:00 AM GJCT CO 8 Good 3 0.3 PPM
4:00 AM GRET CO 8 Good 3 0.3 PPM
3:00 AM CASA CO 8 Good 3 0.3 PPM
3:00 AM GRET CO 8 Good 3 0.3 PPM
2:00 AM CAMP CO 8 Good 3 0.3 PPM
2:00 AM CASA CO 8 Good 3 0.3 PPM
2:00 AM GJCT CO 8 Good 3 0.3 PPM
2:00 AM GRET CO 8 Good 3 0.3 PPM
1:00 AM CASA CO 8 Good 3 0.3 PPM
1:00 AM GJCT CO 8 Good 3 0.3 PPM
1:00 AM GRET CO 8 Good 3 0.3 PPM
1:00 AM H24 CO 8 Good 3 0.3 PPM
3:00 AM GJCT CO 8 Good 5 0.4 PPM
1:00 AM CAMP CO 8 Good 5 0.4 PPM
4:00 AM FTC CO 8 Good 6 0.5 PPM
3:00 AM FTC CO 8 Good 6 0.5 PPM
4:00 AM I25DEN CO 8 Good 7 0.6 PPM
3:00 AM I25DEN CO 8 Good 7 0.6 PPM
2:00 AM FTC CO 8 Good 7 0.6 PPM
1:00 AM FTC CO 8 Good 7 0.6 PPM
2:00 AM I25DEN CO 8 Good 8 0.7 PPM
1:00 AM I25DEN CO 8 Good 8 0.7 PPM
4:00 AM CHAT PM2.5 24 Good 5 1 µg/m3
3:00 AM CHAT PM2.5 24 Good 5 1 µg/m3
2:00 AM CHAT PM2.5 24 Good 6 1 µg/m3
1:00 AM CHAT PM2.5 24 Good 6 2 µg/m3
4:00 AM CCOL PM2.5 24 Good 8 2 µg/m3
3:00 AM CCOL PM2.5 24 Good 8 2 µg/m3
2:00 AM CCOL PM2.5 24 Good 9 2 µg/m3
1:00 AM CCOL PM2.5 24 Good 10 2 µg/m3
4:00 AM CCOL PM10 24 Good 3 3 µg/m3
4:00 AM CHAT PM10 24 Good 3 3 µg/m3
3:00 AM CCOL PM10 24 Good 3 3 µg/m3
3:00 AM CHAT PM10 24 Good 3 3 µg/m3
2:00 AM CCOL PM10 24 Good 3 3 µg/m3
2:00 AM CHAT PM10 24 Good 3 3 µg/m3
1:00 AM CCOL PM10 24 Good 3 3 µg/m3
1:00 AM CHAT PM10 24 Good 3 3 µg/m3
4:00 AM CAMP PM2.5 24 Good 13 3 µg/m3
4:00 AM RIFL PM2.5 24 Good 15 4 µg/m3
3:00 AM CAMP PM2.5 24 Good 15 4 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 15 4 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 15 4 µg/m3
4:00 AM ASPN2 PM2.5 24 Good 15 4 µg/m3
4:00 AM CASA PM2.5 24 Good 15 4 µg/m3
3:00 AM ASPN2 PM2.5 24 Good 15 4 µg/m3
3:00 AM RIFL PM2.5 24 Good 16 4 µg/m3
2:00 AM CAMP PM2.5 24 Good 16 4 µg/m3
3:00 AM CASA PM2.5 24 Good 16 4 µg/m3
1:00 AM CAMP PM2.5 24 Good 16 4 µg/m3
4:00 AM CAMP PM10 24 Good 4 4 µg/m3
2:00 AM RIFL PM2.5 24 Good 17 4 µg/m3
4:00 AM SWAN PM2.5 24 Good 17 4 µg/m3
2:00 AM CASA PM2.5 24 Good 17 4 µg/m3
4:00 AM ADM PM2.5 24 Good 18 4 µg/m3
4:00 AM I25DEN PM2.5 24 Good 18 4 µg/m3
1:00 AM RIFL PM2.5 24 Good 18 4 µg/m3
1:00 AM CASA PM2.5 24 Good 18 4 µg/m3
3:00 AM ADM PM2.5 24 Good 19 5 µg/m3
3:00 AM I25DEN PM2.5 24 Good 19 5 µg/m3
3:00 AM SWAN PM2.5 24 Good 19 5 µg/m3
2:00 AM SWAN PM2.5 24 Good 19 5 µg/m3
2:00 AM I25DEN PM2.5 24 Good 20 5 µg/m3
1:00 AM I25DEN PM2.5 24 Good 20 5 µg/m3
2:00 AM ADM PM2.5 24 Good 20 5 µg/m3
1:00 AM SWAN PM2.5 24 Good 20 5 µg/m3
3:00 AM CAMP PM10 24 Good 5 5 µg/m3
2:00 AM CAMP PM10 24 Good 5 5 µg/m3
1:00 AM ADM PM2.5 24 Good 21 5 µg/m3
1:00 AM CAMP PM10 24 Good 5 5 µg/m3
1:00 AM GJPB PM2.5 24 Good 22 5 µg/m3
4:00 AM I25GLO PM2.5 24 Good 22 5 µg/m3
3:00 AM I25GLO PM2.5 24 Good 23 6 µg/m3
2:00 AM GJPB PM2.5 24 Good 23 6 µg/m3
4:00 AM GJPB PM2.5 24 Good 24 6 µg/m3
3:00 AM GJPB PM2.5 24 Good 24 6 µg/m3
2:00 AM I25GLO PM2.5 24 Good 24 6 µg/m3
1:00 AM I25GLO PM2.5 24 Good 24 6 µg/m3
4:00 AM CASA PM10 24 Good 6 6 µg/m3
4:00 AM WBY PM10 24 Good 6 6 µg/m3
3:00 AM CASA PM10 24 Good 6 6 µg/m3
3:00 AM WBY PM10 24 Good 6 6 µg/m3
2:00 AM CASA PM10 24 Good 6 6 µg/m3
4:00 AM FTCF PM2.5 24 Good 27 7 µg/m3
4:00 AM LNGM PM2.5 24 Good 27 7 µg/m3
3:00 AM FTCF PM2.5 24 Good 27 7 µg/m3
1:00 AM FTCF PM2.5 24 Good 27 7 µg/m3
2:00 AM FTCF PM2.5 24 Good 28 7 µg/m3
3:00 AM LNGM PM2.5 24 Good 29 7 µg/m3
4:00 AM ASPN2 PM10 24 Good 6 7 µg/m3
4:00 AM GJPB PM10 24 Good 6 7 µg/m3
4:00 AM SWAN PM10 24 Good 6 7 µg/m3
3:00 AM ASPN2 PM10 24 Good 6 7 µg/m3
3:00 AM GJPB PM10 24 Good 6 7 µg/m3
2:00 AM ASPN2 PM10 24 Good 6 7 µg/m3
2:00 AM GJPB PM10 24 Good 6 7 µg/m3
2:00 AM WBY PM10 24 Good 6 7 µg/m3
1:00 AM ASPN2 PM10 24 Good 6 7 µg/m3
1:00 AM CASA PM10 24 Good 6 7 µg/m3
1:00 AM GJPB PM10 24 Good 6 7 µg/m3
1:00 AM WBY PM10 24 Good 6 7 µg/m3
2:00 AM LNGM PM2.5 24 Good 31 7 µg/m3
3:00 AM SWAN PM10 24 Good 7 8 µg/m3
2:00 AM SWAN PM10 24 Good 7 8 µg/m3
1:00 AM SWAN PM10 24 Good 7 8 µg/m3
1:00 AM LNGM PM2.5 24 Good 34 8 µg/m3
2:00 AM DELT PM2.5 24 Good 35 8 µg/m3
4:00 AM DELT PM2.5 24 Good 35 9 µg/m3
3:00 AM DELT PM2.5 24 Good 35 9 µg/m3
1:00 AM DELT PM2.5 24 Good 36 9 µg/m3
4:00 AM ADM PM10 24 Good 8 9 µg/m3
4:00 AM I25DEN PM10 24 Good 8 9 µg/m3
3:00 AM ADM PM10 24 Good 8 9 µg/m3
3:00 AM I25DEN PM10 24 Good 8 9 µg/m3
2:00 AM ADM PM10 24 Good 8 9 µg/m3
2:00 AM I25DEN PM10 24 Good 8 9 µg/m3
1:00 AM ADM PM10 24 Good 8 9 µg/m3
1:00 AM I25DEN PM10 24 Good 8 9 µg/m3
4:00 AM FTCF PM10 24 Good 9 10 µg/m3
3:00 AM FTCF PM10 24 Good 9 10 µg/m3
2:00 AM FTCF PM10 24 Good 9 10 µg/m3
1:00 AM FTCF PM10 24 Good 9 10 µg/m3
4:00 AM I25GLO PM10 24 Good 11 12 µg/m3
3:00 AM I25GLO PM10 24 Good 11 12 µg/m3
2:00 AM I25GLO PM10 24 Good 11 12 µg/m3
1:00 AM I25GLO PM10 24 Good 11 12 µg/m3
1:00 AM ASPN O3 8 Good 34 37 PPB
4:00 AM ASPN O3 8 Good 35 38 PPB
3:00 AM ASPN O3 8 Good 35 38 PPB
2:00 AM ASPN O3 8 Good 35 38 PPB
2:00 AM FTC O3 8 Good 2 2 PPB
1:00 AM FTC O3 8 Good 2 2 PPB
4:00 AM RIFLO3 O3 8 Good 4 4 PPB
3:00 AM FTC O3 8 Good 4 4 PPB
4:00 AM FTC O3 8 Good 5 5 PPB
3:00 AM RIFLO3 O3 8 Good 5 5 PPB
2:00 AM RIFLO3 O3 8 Good 5 5 PPB
4:00 AM WBY O3 8 Good 6 6 PPB
1:00 AM RIFLO3 O3 8 Good 6 6 PPB
4:00 AM GRET O3 8 Good 8 9 PPB
3:00 AM GRET O3 8 Good 10 11 PPB
3:00 AM WBY O3 8 Good 10 11 PPB
4:00 AM CASA O3 8 Good 11 12 PPB
2:00 AM GRET O3 8 Good 11 12 PPB
3:00 AM CTZ O3 8 Good 12 13 PPB
2:00 AM CTZ O3 8 Good 12 13 PPB
1:00 AM CTZ O3 8 Good 12 13 PPB
4:00 AM CTZ O3 8 Good 13 14 PPB
1:00 AM GRET O3 8 Good 13 14 PPB
3:00 AM CASA O3 8 Good 15 16 PPB
2:00 AM WBY O3 8 Good 15 16 PPB
1:00 AM CAMP O3 8 Good 16 17 PPB
2:00 AM CASA O3 8 Good 17 18 PPB
1:00 AM CASA O3 8 Good 17 18 PPB
4:00 AM CAMP O3 8 Good 18 19 PPB
2:00 AM CAMP O3 8 Good 18 19 PPB
4:00 AM PDX O3 8 Good 19 20 PPB
1:00 AM WBY O3 8 Good 19 21 PPB
4:00 AM PAL O3 8 Good 20 22 PPB
3:00 AM CAMP O3 8 Good 20 22 PPB
3:00 AM PDX O3 8 Good 20 22 PPB
3:00 AM PAL O3 8 Good 21 23 PPB
2:00 AM PDX O3 8 Good 21 23 PPB
2:00 AM PAL O3 8 Good 22 24 PPB
1:00 AM PDX O3 8 Good 22 24 PPB
1:00 AM PAL O3 8 Good 24 26 PPB
4:00 AM ELK O3 8 Good 26 28 PPB
3:00 AM ELK O3 8 Good 26 28 PPB
2:00 AM ELK O3 8 Good 26 28 PPB
1:00 AM ELK O3 8 Good 27 29 PPB
1:00 AM WCH O3 8 Good 29 31 PPB
2:00 AM WCH O3 8 Good 30 32 PPB
3:00 AM FTCW O3 8 Good 31 33 PPB
1:00 AM FTCW O3 8 Good 31 33 PPB
4:00 AM FTCW O3 8 Good 31 34 PPB
3:00 AM WCH O3 8 Good 31 34 PPB
2:00 AM FTCW O3 8 Good 31 34 PPB
4:00 AM WCH O3 8 Good 33 36 PPB
3:00 AM AURE O3 8 Good 34 37 PPB
2:00 AM AURE O3 8 Good 34 37 PPB
1:00 AM AURE O3 8 Good 34 37 PPB
1:00 AM HLD O3 8 Good 34 37 PPB
4:00 AM AURE O3 8 Good 35 38 PPB
2:00 AM HLD O3 8 Good 36 39 PPB
1:00 AM CHAT O3 8 Good 36 39 PPB
4:00 AM CHAT O3 8 Good 37 40 PPB
2:00 AM CHAT O3 8 Good 37 40 PPB
1:00 AM ASP O3 8 Good 37 40 PPB
4:00 AM BOUR O3 8 Good 38 41 PPB
4:00 AM HLD O3 8 Good 38 41 PPB
3:00 AM BOUR O3 8 Good 38 41 PPB
3:00 AM CHAT O3 8 Good 38 41 PPB
3:00 AM HLD O3 8 Good 38 41 PPB
2:00 AM ASP O3 8 Good 39 42 PPB
2:00 AM BOUR O3 8 Good 40 43 PPB
1:00 AM MAN O3 8 Good 40 43 PPB
4:00 AM NREL O3 8 Good 41 44 PPB
3:00 AM ASP O3 8 Good 41 44 PPB
3:00 AM NREL O3 8 Good 41 44 PPB
2:00 AM MAN O3 8 Good 41 44 PPB
2:00 AM NREL O3 8 Good 41 44 PPB
1:00 AM BOUR O3 8 Good 41 44 PPB
4:00 AM ASP O3 8 Good 42 45 PPB
4:00 AM MAN O3 8 Good 42 45 PPB
3:00 AM MAN O3 8 Good 42 45 PPB
1:00 AM NREL O3 8 Good 42 45 PPB
4:00 AM ACAD O3 8 Good 44 47 PPB
4:00 AM RFN O3 8 Good 44 48 PPB
3:00 AM ACAD O3 8 Good 44 48 PPB
2:00 AM ACAD O3 8 Good 44 48 PPB
1:00 AM ACAD O3 8 Good 44 48 PPB
3:00 AM RFN O3 8 Good 45 49 PPB
2:00 AM RFN O3 8 Good 45 49 PPB
1:00 AM RFN O3 8 Good 46 50 PPB

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