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AQI Calculations on 09/20/2024 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 CAMP SO2 1 Good 1 1 PPB
4:00 AM CAMP SO2 1 Good 1 1 PPB
4:00 AM CCOL CO 8 Good 1 0.1 PPM
4:00 AM FTC CO 8 Good 1 0.1 PPM
4:00 AM GRET CO 8 Good 1 0.1 PPM
4:00 AM RFN NO2 1 Good 1 1 PPB
3:00 AM CCOL CO 8 Good 1 0.1 PPM
3:00 AM FTC CO 8 Good 1 0.1 PPM
3:00 AM GRET CO 8 Good 1 0.1 PPM
2:00 AM CCOL CO 8 Good 1 0.1 PPM
2:00 AM GRET CO 8 Good 1 0.1 PPM
2:00 AM RFN NO2 1 Good 1 1 PPB
1:00 AM CCOL CO 8 Good 1 0.1 PPM
1:00 AM GRET CO 8 Good 1 0.1 PPM
4:00 AM CASA CO 8 Good 2 0.2 PPM
3:00 AM CASA CO 8 Good 2 0.2 PPM
3:00 AM RFN NO2 1 Good 2 2 PPB
2:00 AM CASA CO 8 Good 2 0.2 PPM
2:00 AM FTC CO 8 Good 2 0.2 PPM
1:00 AM CASA CO 8 Good 2 0.2 PPM
1:00 AM FOS NO2 1 Good 2 2 PPB
1:00 AM FTC CO 8 Good 2 0.2 PPM
4:00 AM FOS NO2 1 Good 3 3 PPB
3:00 AM FOS NO2 1 Good 3 3 PPB
2:00 AM FOS NO2 1 Good 3 3 PPB
4:00 AM TIM NO2 1 Good 4 4 PPB
2:00 AM TIM NO2 1 Good 4 4 PPB
1:00 AM TIM NO2 1 Good 4 4 PPB
3:00 AM LAST NO2 1 Good 5 5 PPB
3:00 AM TIM NO2 1 Good 5 5 PPB
1:00 AM I25DEN CO 8 Good 5 0.4 PPM
1:00 AM RFN NO2 1 Good 5 5 PPB
4:00 AM I25DEN CO 8 Good 6 0.5 PPM
4:00 AM LAST NO2 1 Good 6 6 PPB
3:00 AM I25DEN CO 8 Good 6 0.5 PPM
2:00 AM I25DEN CO 8 Good 6 0.5 PPM
2:00 AM LAST NO2 1 Good 7 7 PPB
1:00 AM LAST NO2 1 Good 8 8 PPB
4:00 AM SSMB PM10 24 Good 11 12 µg/m3
4:00 AM WBY O3 8 Good 11 12 PPB
3:00 AM SSMB PM10 24 Good 11 12 µg/m3
2:00 AM CAMP PM10 24 Good 11 12 µg/m3
2:00 AM SSMB PM10 24 Good 11 12 µg/m3
1:00 AM CAMP PM10 24 Good 11 12 µg/m3
1:00 AM SSMB PM10 24 Good 11 12 µg/m3
4:00 AM ACC PM10 24 Good 12 13 µg/m3
4:00 AM CAMP PM10 24 Good 12 13 µg/m3
3:00 AM ACC PM10 24 Good 12 13 µg/m3
3:00 AM CAMP PM10 24 Good 12 13 µg/m3
2:00 AM ACC PM10 24 Good 12 13 µg/m3
1:00 AM ACC PM10 24 Good 12 13 µg/m3
3:00 AM CASA NO2 1 Good 13 14 PPB
2:00 AM ALA PM10 24 Good 13 14 µg/m3
1:00 AM ALA PM10 24 Good 13 14 µg/m3
4:00 AM ALA PM10 24 Good 14 15 µg/m3
4:00 AM CASA NO2 1 Good 14 15 PPB
3:00 AM ALA PM10 24 Good 14 15 µg/m3
1:00 AM CASA NO2 1 Good 14 15 PPB
4:00 AM I25DEN PM10 24 Good 15 16 µg/m3
3:00 AM I25DEN PM10 24 Good 15 16 µg/m3
3:00 AM RIFL PM2.5 24 Good 15 2 µg/m3
3:00 AM WBY O3 8 Good 15 16 PPB
2:00 AM I25DEN PM10 24 Good 15 16 µg/m3
2:00 AM RIFL PM2.5 24 Good 15 2 µg/m3
1:00 AM I25DEN PM10 24 Good 15 16 µg/m3
4:00 AM CCOL PM10 24 Good 16 17 µg/m3
4:00 AM CHAT PM10 24 Good 16 17 µg/m3
4:00 AM NJH PM10 24 Good 16 17 µg/m3
4:00 AM RIFL PM2.5 24 Good 16 2 µg/m3
4:00 AM TEL PM10 24 Good 16 17 µg/m3
3:00 AM CCOL PM10 24 Good 16 17 µg/m3
3:00 AM CHAT PM10 24 Good 16 17 µg/m3
3:00 AM NJH PM10 24 Good 16 17 µg/m3
3:00 AM TEL PM10 24 Good 16 17 µg/m3
2:00 AM CASA NO2 1 Good 16 17 PPB
2:00 AM CCOL PM10 24 Good 16 17 µg/m3
2:00 AM CHAT PM10 24 Good 16 17 µg/m3
2:00 AM NJH PM10 24 Good 16 17 µg/m3
2:00 AM TEL PM10 24 Good 16 17 µg/m3
1:00 AM CCOL PM10 24 Good 16 17 µg/m3
1:00 AM CHAT PM10 24 Good 16 17 µg/m3
1:00 AM NJH PM10 24 Good 16 17 µg/m3
1:00 AM RIFL PM2.5 24 Good 16 2 µg/m3
1:00 AM TEL PM10 24 Good 16 17 µg/m3
4:00 AM CHAT PM2.5 24 Good 17 3 µg/m3
4:00 AM GJPB PM10 24 Good 17 18 µg/m3
4:00 AM PAG PM10 24 Good 17 18 µg/m3
3:00 AM ACC PM2.5 24 Good 17 3 µg/m3
3:00 AM CHAT PM2.5 24 Good 17 3 µg/m3
3:00 AM GJPB PM10 24 Good 17 18 µg/m3
3:00 AM PAG PM10 24 Good 17 18 µg/m3
2:00 AM ACC PM2.5 24 Good 17 3 µg/m3
2:00 AM CHAT PM2.5 24 Good 17 3 µg/m3
2:00 AM GJPB PM10 24 Good 17 18 µg/m3
2:00 AM PAG PM10 24 Good 17 18 µg/m3
1:00 AM ACC PM2.5 24 Good 17 3 µg/m3
1:00 AM CHAT PM2.5 24 Good 17 3 µg/m3
1:00 AM GJPB PM10 24 Good 17 18 µg/m3
1:00 AM LMB PM10 24 Good 17 18 µg/m3
1:00 AM PAG PM10 24 Good 17 18 µg/m3
4:00 AM ACC PM2.5 24 Good 18 3 µg/m3
2:00 AM LMB PM10 24 Good 18 19 µg/m3
1:00 AM PFS PM10 24 Good 18 19 µg/m3
4:00 AM ALA PM2.5 24 Good 19 3 µg/m3
4:00 AM BOU PM10 24 Good 19 21 µg/m3
4:00 AM CAMP O3 8 Good 19 21 PPB
4:00 AM CASA O3 8 Good 19 21 PPB
4:00 AM LMB PM10 24 Good 19 21 µg/m3
4:00 AM PFS PM10 24 Good 19 20 µg/m3
4:00 AM RIFLO3 O3 8 Good 19 21 PPB
3:00 AM ALA PM2.5 24 Good 19 3 µg/m3
3:00 AM BOU PM10 24 Good 19 21 µg/m3
3:00 AM CCOL PM2.5 24 Good 19 3 µg/m3
3:00 AM I25GLO PM10 24 Good 19 21 µg/m3
3:00 AM LMB PM10 24 Good 19 20 µg/m3
3:00 AM NJH PM2.5 24 Good 19 3 µg/m3
3:00 AM PFS PM10 24 Good 19 20 µg/m3
2:00 AM ALA PM2.5 24 Good 19 3 µg/m3
2:00 AM BOU PM10 24 Good 19 21 µg/m3
2:00 AM BOU PM2.5 24 Good 19 3 µg/m3
2:00 AM CCOL PM2.5 24 Good 19 3 µg/m3
2:00 AM I25DEN NO2 1 Good 19 20 PPB
2:00 AM I25GLO PM10 24 Good 19 21 µg/m3
2:00 AM NJH PM2.5 24 Good 19 3 µg/m3
2:00 AM PFS PM10 24 Good 19 20 µg/m3
2:00 AM WBY O3 8 Good 19 21 PPB
1:00 AM ALA PM2.5 24 Good 19 3 µg/m3
1:00 AM BOU PM10 24 Good 19 21 µg/m3
1:00 AM BOU PM2.5 24 Good 19 3 µg/m3
1:00 AM CCOL PM2.5 24 Good 19 3 µg/m3
1:00 AM I25GLO PM10 24 Good 19 20 µg/m3
1:00 AM LMB PM2.5 24 Good 19 3 µg/m3
1:00 AM NJH PM2.5 24 Good 19 3 µg/m3
4:00 AM BOU PM2.5 24 Good 20 3 µg/m3
4:00 AM CCOL PM2.5 24 Good 20 3 µg/m3
4:00 AM I25GLO PM10 24 Good 20 22 µg/m3
4:00 AM NJH PM2.5 24 Good 20 3 µg/m3
3:00 AM BOU PM2.5 24 Good 20 3 µg/m3
3:00 AM CASA PM10 24 Good 20 22 µg/m3
3:00 AM RIFLO3 O3 8 Good 20 22 PPB
2:00 AM CAMP PM2.5 24 Good 20 3 µg/m3
2:00 AM CASA PM10 24 Good 20 22 µg/m3
2:00 AM LMB PM2.5 24 Good 20 3 µg/m3
1:00 AM CAMP PM2.5 24 Good 20 3 µg/m3
1:00 AM CASA PM10 24 Good 20 22 µg/m3
1:00 AM PFS PM2.5 24 Good 20 3 µg/m3
4:00 AM CAMP NO2 1 Good 21 22 PPB
4:00 AM CAMP NO2 1 Good 21 22 PPB
4:00 AM CASA PM10 24 Good 21 23 µg/m3
4:00 AM PFS PM2.5 24 Good 21 3 µg/m3
3:00 AM ASPN2 PM10 24 Good 21 23 µg/m3
3:00 AM CAMP PM2.5 24 Good 21 3 µg/m3
3:00 AM CASA O3 8 Good 21 23 PPB
3:00 AM PFS PM2.5 24 Good 21 3 µg/m3
2:00 AM ASPN2 PM10 24 Good 21 23 µg/m3
2:00 AM PFS PM2.5 24 Good 21 3 µg/m3
1:00 AM ASPN2 PM10 24 Good 21 23 µg/m3
4:00 AM ASPN2 PM10 24 Good 22 24 µg/m3
4:00 AM CAMP PM2.5 24 Good 22 3 µg/m3
4:00 AM CASA PM2.5 24 Good 22 4 µg/m3
3:00 AM CAMP O3 8 Good 22 24 PPB
3:00 AM CASA PM2.5 24 Good 22 4 µg/m3
3:00 AM I25DEN NO2 1 Good 22 23 PPB
3:00 AM LMB PM2.5 24 Good 22 3 µg/m3
2:00 AM CASA PM2.5 24 Good 22 3 µg/m3
2:00 AM RIFLO3 O3 8 Good 22 24 PPB
1:00 AM CASA PM2.5 24 Good 22 3 µg/m3
4:00 AM CAN PM10 24 Good 23 25 µg/m3
4:00 AM LMB PM2.5 24 Good 23 4 µg/m3
3:00 AM ASPN2 PM2.5 24 Good 23 4 µg/m3
3:00 AM CAN PM10 24 Good 23 25 µg/m3
3:00 AM WBY NO2 1 Good 23 24 PPB
3:00 AM WBY NO2 1 Good 23 24 PPB
2:00 AM ASPN2 PM2.5 24 Good 23 4 µg/m3
2:00 AM CAMP NO2 1 Good 23 24 PPB
2:00 AM CAMP NO2 1 Good 23 24 PPB
1:00 AM ASPN2 PM2.5 24 Good 23 4 µg/m3
1:00 AM WBY NO2 1 Good 23 24 PPB
1:00 AM WBY NO2 1 Good 23 24 PPB
4:00 AM ASPN2 PM2.5 24 Good 24 4 µg/m3
2:00 AM CASA O3 8 Good 24 26 PPB
1:00 AM FTCF PM10 24 Good 24 26 µg/m3
1:00 AM RIFLO3 O3 8 Good 24 26 PPB
1:00 AM WBY O3 8 Good 24 26 PPB
4:00 AM GRET O3 8 Good 25 27 PPB
2:00 AM FTCF PM10 24 Good 25 27 µg/m3
1:00 AM I25DEN NO2 1 Good 25 26 PPB
4:00 AM FTCF PM10 24 Good 26 28 µg/m3
4:00 AM LAST O3 8 Good 26 28 PPB
4:00 AM LNGM PM2.5 24 Good 26 4 µg/m3
4:00 AM TIM O3 8 Good 26 28 PPB
3:00 AM FTCF PM10 24 Good 26 28 µg/m3
3:00 AM LNGM PM2.5 24 Good 26 4 µg/m3
2:00 AM CAN PM10 24 Good 26 28 µg/m3
2:00 AM LNGM PM10 24 Good 26 28 µg/m3
2:00 AM LNGM PM2.5 24 Good 26 4 µg/m3
2:00 AM WBY NO2 1 Good 26 28 PPB
2:00 AM WBY NO2 1 Good 26 28 PPB
1:00 AM CAN PM10 24 Good 26 28 µg/m3
1:00 AM GREH PM10 24 Good 26 28 µg/m3
1:00 AM LNGM PM10 24 Good 26 28 µg/m3
1:00 AM LNGM PM2.5 24 Good 26 4 µg/m3
4:00 AM CTZ O3 8 Good 27 29 PPB
4:00 AM GREH PM10 24 Good 27 29 µg/m3
4:00 AM LNGM PM10 24 Good 27 29 µg/m3
3:00 AM GREH PM10 24 Good 27 29 µg/m3
3:00 AM GRET O3 8 Good 27 29 PPB
3:00 AM LNGM PM10 24 Good 27 29 µg/m3
2:00 AM ADB PM2.5 24 Good 27 4 µg/m3
2:00 AM CAMP O3 8 Good 27 29 PPB
2:00 AM GREH PM10 24 Good 27 29 µg/m3
2:00 AM I25GLO PM2.5 24 Good 27 4 µg/m3
2:00 AM PMS PM2.5 24 Good 27 4 µg/m3
1:00 AM ADB PM2.5 24 Good 27 4 µg/m3
1:00 AM FTCF PM2.5 24 Good 27 4 µg/m3
1:00 AM I25GLO PM2.5 24 Good 27 4 µg/m3
1:00 AM PMS PM2.5 24 Good 27 4 µg/m3
4:00 AM ADB PM2.5 24 Good 28 5 µg/m3
4:00 AM GJPB PM2.5 24 Good 28 5 µg/m3
4:00 AM I25GLO PM2.5 24 Good 28 5 µg/m3
4:00 AM PMS PM2.5 24 Good 28 5 µg/m3
3:00 AM ADB PM2.5 24 Good 28 5 µg/m3
3:00 AM CTZ O3 8 Good 28 30 PPB
3:00 AM GJPB PM2.5 24 Good 28 5 µg/m3
3:00 AM I25GLO PM2.5 24 Good 28 5 µg/m3
3:00 AM LAST O3 8 Good 28 30 PPB
3:00 AM PMS PM2.5 24 Good 28 5 µg/m3
2:00 AM FTCF PM2.5 24 Good 28 5 µg/m3
2:00 AM GJPB PM2.5 24 Good 28 5 µg/m3
2:00 AM GRET O3 8 Good 28 30 PPB
1:00 AM GJPB PM2.5 24 Good 28 5 µg/m3
4:00 AM ACAD O3 8 Good 29 31 PPB
4:00 AM FTCF PM2.5 24 Good 29 5 µg/m3
4:00 AM I25DEN NO2 1 Good 29 31 PPB
4:00 AM I25DEN PM2.5 24 Good 29 5 µg/m3
4:00 AM WBY NO2 1 Good 29 31 PPB
4:00 AM WBY NO2 1 Good 29 31 PPB
3:00 AM FTCF PM2.5 24 Good 29 5 µg/m3
3:00 AM I25DEN PM2.5 24 Good 29 5 µg/m3
3:00 AM TIM O3 8 Good 29 31 PPB
2:00 AM I25DEN PM2.5 24 Good 29 5 µg/m3
1:00 AM CAMP NO2 1 Good 29 31 PPB
1:00 AM CAMP NO2 1 Good 29 31 PPB
1:00 AM CASA O3 8 Good 29 31 PPB
1:00 AM I25DEN PM2.5 24 Good 29 5 µg/m3
2:00 AM CTZ O3 8 Good 30 32 PPB
4:00 AM FOS O3 8 Good 31 33 PPB
4:00 AM FTC O3 8 Good 31 34 PPB
4:00 AM GREH PM2.5 24 Good 31 5 µg/m3
3:00 AM ACAD O3 8 Good 31 34 PPB
3:00 AM CAMP NO2 1 Good 31 33 PPB
3:00 AM CAMP NO2 1 Good 31 33 PPB
3:00 AM FTC O3 8 Good 31 33 PPB
3:00 AM GREH PM2.5 24 Good 31 5 µg/m3
2:00 AM FTC O3 8 Good 31 33 PPB
2:00 AM GREH PM2.5 24 Good 31 5 µg/m3
2:00 AM LAST O3 8 Good 31 33 PPB
2:00 AM TIM O3 8 Good 31 33 PPB
1:00 AM ADB PM10 24 Good 31 34 µg/m3
1:00 AM CAMP O3 8 Good 31 33 PPB
1:00 AM CTZ O3 8 Good 31 34 PPB
1:00 AM GREH PM2.5 24 Good 31 5 µg/m3
1:00 AM GRET O3 8 Good 31 33 PPB
4:00 AM ASPN O3 8 Good 32 35 PPB
4:00 AM BOUR O3 8 Good 32 35 PPB
4:00 AM CHAT O3 8 Good 32 35 PPB
4:00 AM PWES O3 8 Good 32 35 PPB
3:00 AM FOS O3 8 Good 32 35 PPB
1:00 AM FTC O3 8 Good 32 35 PPB
1:00 AM TIM O3 8 Good 32 35 PPB
4:00 AM ADB PM10 24 Good 33 36 µg/m3
4:00 AM PAL O3 8 Good 33 36 PPB
3:00 AM ADB PM10 24 Good 33 36 µg/m3
3:00 AM CHAT O3 8 Good 33 36 PPB
2:00 AM ACAD O3 8 Good 33 36 PPB
2:00 AM ADB PM10 24 Good 33 36 µg/m3
2:00 AM FOS O3 8 Good 33 36 PPB
3:00 AM BOUR O3 8 Good 34 37 PPB
3:00 AM PAL O3 8 Good 34 37 PPB
3:00 AM PWES O3 8 Good 34 37 PPB
1:00 AM LAST O3 8 Good 34 37 PPB
3:00 AM ASPN O3 8 Good 35 38 PPB
2:00 AM BOUR O3 8 Good 35 38 PPB
2:00 AM CHAT O3 8 Good 35 38 PPB
2:00 AM PWES O3 8 Good 35 38 PPB
1:00 AM FOS O3 8 Good 35 38 PPB
2:00 AM ASPN O3 8 Good 36 39 PPB
2:00 AM PAL O3 8 Good 36 39 PPB
1:00 AM ACAD O3 8 Good 36 39 PPB
1:00 AM CHAT O3 8 Good 36 39 PPB
1:00 AM PWES O3 8 Good 36 39 PPB
4:00 AM EVG O3 8 Good 37 40 PPB
3:00 AM I25GLO NO2 1 Good 37 39 PPB
3:00 AM EVG O3 8 Good 38 41 PPB
2:00 AM WBY PM10 24 Good 38 41 µg/m3
1:00 AM ASPN O3 8 Good 38 41 PPB
1:00 AM BOUR O3 8 Good 38 41 PPB
1:00 AM WBY PM10 24 Good 38 41 µg/m3
4:00 AM HLD O3 8 Good 39 42 PPB
4:00 AM I25GLO NO2 1 Good 39 41 PPB
4:00 AM WBY PM10 24 Good 39 42 µg/m3
3:00 AM HLD O3 8 Good 39 42 PPB
3:00 AM WBY PM10 24 Good 39 42 µg/m3
2:00 AM I25GLO NO2 1 Good 39 41 PPB
1:00 AM I25GLO NO2 1 Good 39 41 PPB
1:00 AM PAL O3 8 Good 39 42 PPB
2:00 AM EVG O3 8 Good 40 43 PPB
2:00 AM HLD O3 8 Good 40 43 PPB
1:00 AM HLD O3 8 Good 41 44 PPB
4:00 AM MAN O3 8 Good 42 45 PPB
3:00 AM MAN O3 8 Good 42 45 PPB
4:00 AM FTCW O3 8 Good 43 46 PPB
2:00 AM MAN O3 8 Good 43 46 PPB
1:00 AM MAN O3 8 Good 43 46 PPB
3:00 AM FTCW O3 8 Good 44 47 PPB
2:00 AM FTCW O3 8 Good 44 48 PPB
1:00 AM EVG O3 8 Good 44 47 PPB
4:00 AM AURE O3 8 Good 45 49 PPB
3:00 AM AURE O3 8 Good 45 49 PPB
2:00 AM AURE O3 8 Good 45 49 PPB
1:00 AM AURE O3 8 Good 46 50 PPB
1:00 AM FTCW O3 8 Good 46 50 PPB
4:00 AM BHWK O3 8 Good 47 51 PPB
4:00 AM NREL O3 8 Good 48 52 PPB
4:00 AM RFN O3 8 Good 48 52 PPB
3:00 AM BHWK O3 8 Good 48 52 PPB
3:00 AM RFN O3 8 Good 48 52 PPB
2:00 AM BHWK O3 8 Good 48 52 PPB
3:00 AM NREL O3 8 Good 49 53 PPB
2:00 AM NREL O3 8 Good 49 53 PPB
2:00 AM RFN O3 8 Good 49 53 PPB
1:00 AM RFN O3 8 Good 49 53 PPB
1:00 AM BHWK O3 8 Good 50 54 PPB
1:00 AM NREL O3 8 Good 50 54 PPB

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