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AQI Calculations on 11/20/2017 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.

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

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