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AQI Calculations on 11/19/2017 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 42 45 PPB
2:00 AM RFN O3 8 Good 41 44 PPB
2:00 AM ASPN O3 8 Good 36 39 PPB
1:00 AM NREL O3 8 Good 36 39 PPB
2:00 AM I25GLO NO2 1 Good 35 37 PPB
2:00 AM NREL O3 8 Good 35 38 PPB
1:00 AM ASPN O3 8 Good 35 38 PPB
2:00 AM ASP O3 8 Good 33 36 PPB
2:00 AM SWAN NO2 1 Good 33 35 PPB
2:00 AM CASA NO2 1 Good 32 34 PPB
1:00 AM ASP O3 8 Good 32 35 PPB
1:00 AM CASA NO2 1 Good 32 34 PPB
1:00 AM I25GLO NO2 1 Good 32 34 PPB
1:00 AM SWAN NO2 1 Good 32 34 PPB
1:00 AM GREH PM2.5 24 Good 31 8 µg/m3
1:00 AM WBY NO2 1 Good 31 33 PPB
1:00 AM WBY NO2 1 Good 31 33 PPB
2:00 AM GREH PM2.5 24 Good 30 7 µg/m3
2:00 AM LNGM PM2.5 24 Good 30 7 µg/m3
2:00 AM AURE O3 8 Good 29 31 PPB
2:00 AM DELT PM2.5 24 Good 29 7 µg/m3
2:00 AM HLD O3 8 Good 29 31 PPB
2:00 AM WBY NO2 1 Good 29 31 PPB
2:00 AM WBY NO2 1 Good 29 31 PPB
1:00 AM AURE O3 8 Good 29 31 PPB
2:00 AM ELK O3 8 Good 28 30 PPB
1:00 AM ELK O3 8 Good 28 30 PPB
1:00 AM LNGM PM2.5 24 Good 28 7 µg/m3
1:00 AM HLD O3 8 Good 27 29 PPB
1:00 AM DELT PM2.5 24 Good 26 6 µg/m3
1:00 AM FTCW O3 8 Good 25 27 PPB
1:00 AM MAN O3 8 Good 25 27 PPB
1:00 AM PAL O3 8 Good 25 27 PPB
2:00 AM CAMP NO2 1 Good 24 25 PPB
2:00 AM CAMP NO2 1 Good 24 25 PPB
2:00 AM FTCW O3 8 Good 24 26 PPB
2:00 AM MAN O3 8 Good 24 26 PPB
2:00 AM PAL O3 8 Good 24 26 PPB
2:00 AM WCH O3 8 Good 24 26 PPB
1:00 AM PDX O3 8 Good 24 26 PPB
2:00 AM PDX O3 8 Good 23 25 PPB
1:00 AM WCH O3 8 Good 23 25 PPB
1:00 AM CHAT O3 8 Good 22 24 PPB
2:00 AM CHAT O3 8 Good 21 23 PPB
2:00 AM FTCF PM2.5 24 Good 20 5 µg/m3
2:00 AM I25GLO PM2.5 24 Good 20 5 µg/m3
1:00 AM FTCF PM2.5 24 Good 20 5 µg/m3
2:00 AM ADM PM2.5 24 Good 19 5 µg/m3
2:00 AM RIFL PM2.5 24 Good 19 5 µg/m3
2:00 AM SWAN PM2.5 24 Good 19 5 µg/m3
1:00 AM I25GLO PM2.5 24 Good 19 5 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 18 4 µg/m3
1:00 AM ADM PM2.5 24 Good 18 4 µg/m3
1:00 AM BOUR O3 8 Good 18 19 PPB
1:00 AM CTZ O3 8 Good 18 19 PPB
1:00 AM SWAN PM2.5 24 Good 18 4 µg/m3
2:00 AM BOUR O3 8 Good 17 18 PPB
1:00 AM ASPN2 PM2.5 24 Good 17 4 µg/m3
1:00 AM CAMP NO2 1 Good 17 18 PPB
1:00 AM CAMP NO2 1 Good 17 18 PPB
1:00 AM GRET O3 8 Good 17 18 PPB
1:00 AM RIFL PM2.5 24 Good 17 4 µg/m3
2:00 AM CTZ O3 8 Good 16 17 PPB
2:00 AM GJPB PM2.5 24 Good 16 4 µg/m3
2:00 AM I25DEN PM2.5 24 Good 15 4 µg/m3
1:00 AM CAMP O3 8 Good 15 16 PPB
1:00 AM GJPB PM2.5 24 Good 15 4 µg/m3
1:00 AM I25DEN PM2.5 24 Good 14 3 µg/m3
2:00 AM ADM PM10 24 Good 13 14 µg/m3
2:00 AM GRET O3 8 Good 13 14 PPB
1:00 AM ACAD O3 8 Good 13 14 PPB
2:00 AM ACAD O3 8 Good 12 13 PPB
2:00 AM CAMP O3 8 Good 12 13 PPB
2:00 AM CASA PM2.5 24 Good 12 3 µg/m3
2:00 AM I25GLO PM10 24 Good 12 13 µg/m3
1:00 AM ADM PM10 24 Good 12 13 µg/m3
1:00 AM I25GLO PM10 24 Good 12 13 µg/m3
2:00 AM CAMP PM2.5 24 Good 11 3 µg/m3
2:00 AM GREH PM10 24 Good 11 12 µg/m3
1:00 AM CAMP PM2.5 24 Good 11 3 µg/m3
1:00 AM CASA PM2.5 24 Good 11 3 µg/m3
1:00 AM GREH PM10 24 Good 11 12 µg/m3
1:00 AM WBY O3 8 Good 11 12 PPB
2:00 AM CHAT PM2.5 24 Good 10 2 µg/m3
1:00 AM CHAT PM2.5 24 Good 10 2 µg/m3
2:00 AM FTCF PM10 24 Good 9 10 µg/m3
1:00 AM CASA O3 8 Good 9 10 PPB
1:00 AM FTCF PM10 24 Good 9 10 µg/m3
1:00 AM RIFLO3 O3 8 Good 9 10 PPB
2:00 AM RIFLO3 O3 8 Good 8 9 PPB
2:00 AM I25DEN CO 8 Good 7 0.6 PPM
2:00 AM I25DEN PM10 24 Good 7 8 µg/m3
2:00 AM SWAN PM10 24 Good 7 8 µg/m3
2:00 AM WBY PM10 24 Good 7 8 µg/m3
1:00 AM I25DEN PM10 24 Good 7 8 µg/m3
1:00 AM SWAN PM10 24 Good 7 8 µg/m3
2:00 AM ASPN2 PM10 24 Good 6 6 µg/m3
2:00 AM FTC O3 8 Good 6 7 PPB
2:00 AM H24 CO 8 Good 6 0.5 PPM
2:00 AM WBY O3 8 Good 6 7 PPB
1:00 AM ASPN2 PM10 24 Good 6 6 µg/m3
1:00 AM FTC CO 8 Good 6 0.5 PPM
1:00 AM FTC O3 8 Good 6 7 PPB
1:00 AM H24 CO 8 Good 6 0.5 PPM
1:00 AM I25DEN CO 8 Good 6 0.5 PPM
1:00 AM WBY PM10 24 Good 6 7 µg/m3
2:00 AM CASA CO 8 Good 5 0.4 PPM
2:00 AM CASA O3 8 Good 5 5 PPB
2:00 AM CHAT PM10 24 Good 5 5 µg/m3
2:00 AM FTC CO 8 Good 5 0.4 PPM
2:00 AM GJPB PM10 24 Good 5 5 µg/m3
2:00 AM WBY CO 8 Good 5 0.4 PPM
1:00 AM CHAT PM10 24 Good 5 5 µg/m3
1:00 AM WBY CO 8 Good 5 0.4 PPM
2:00 AM CAMP PM10 24 Good 4 4 µg/m3
2:00 AM CASA PM10 24 Good 4 4 µg/m3
1:00 AM CAMP PM10 24 Good 4 4 µg/m3
1:00 AM CASA PM10 24 Good 4 4 µg/m3
1:00 AM GJPB PM10 24 Good 4 4 µg/m3
2:00 AM CAMP CO 8 Good 3 0.3 PPM
2:00 AM GJCT CO 8 Good 3 0.3 PPM
1:00 AM CAMP 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
2:00 AM GRET CO 8 Good 2 0.2 PPM
1:00 AM GRET CO 8 Good 2 0.2 PPM
2:00 AM CASA 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.