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

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