Colorado
Translate
Banner with Colorado and CDPHE logos on left with text on right reading Colorado Air Quality with Department of Public Health and Environment on the next line.

AQI Calculations on 06/10/2026 1:00AM - 3:00AM

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.


Due to limited system resources and high volume, today's AQI calculations can no longer be sorted by columns. For a CSV file of these data, updated hourly, click here.


All data are collected real-time and have not been corrected nor validated.

Time *
(MST)
 Monitoring Location Pollutant Interval
(Hr)
 Air Quality AQI Avg.
3:00 AM ACAD O3 8 Good 36 39 PPB
3:00 AM ACC PM10 24 Good 25 27 µg/m3
3:00 AM ACC PM2.5 24 Good 40 7 µg/m3
3:00 AM ADB PM10 24 Good 34 37 µg/m3
3:00 AM ADB PM2.5 24 Good 41 7 µg/m3
3:00 AM ALA PM10 24 Good 32 35 µg/m3
3:00 AM ALA PM2.5 24 Good 29 5 µg/m3
3:00 AM ASPN O3 8 Good 41 44 PPB
3:00 AM ASPN2 PM10 24 Good 22 24 µg/m3
3:00 AM ASPN2 PM2.5 24 Good 19 3 µg/m3
3:00 AM AURE O3 8 Good 42 45 PPB
3:00 AM BHWK O3 8 Good 48 52 PPB
3:00 AM BOU PM10 24 Good 26 28 µg/m3
3:00 AM BOU PM2.5 24 Good 28 5 µg/m3
3:00 AM BOUR O3 8 Good 46 50 PPB
3:00 AM CAMP NO2 1 Good 4 4 PPB
3:00 AM CAMP NO2 1 Good 4 4 PPB
3:00 AM CAMP O3 8 Good 36 39 PPB
3:00 AM CAMP PM10 24 Good 21 23 µg/m3
3:00 AM CAMP PM2.5 24 Good 41 7 µg/m3
3:00 AM CAN PM10 24 Good 34 37 µg/m3
3:00 AM CAN PM2.5 24 Good 33 5 µg/m3
3:00 AM CASA CO 8 Good 1 0.1 PPM
3:00 AM CASA NO2 1 Good 8 8 PPB
3:00 AM CASA O3 8 Good 34 37 PPB
3:00 AM CASA PM10 24 Good 30 32 µg/m3
3:00 AM CASA PM2.5 24 Good 38 6 µg/m3
3:00 AM CCOL PM10 24 Good 38 41 µg/m3
3:00 AM CCOL PM2.5 24 Good 33 6 µg/m3
3:00 AM CHAT PM10 24 Good 22 24 µg/m3
3:00 AM CHAT PM2.5 24 Good 33 5 µg/m3
3:00 AM CTZ O3 8 Good 30 32 PPB
3:00 AM DELT PM10 24 Good 35 38 µg/m3
3:00 AM DELT PM2.5 24 Good 32 5 µg/m3
3:00 AM DELT PM2.5 24 Good 32 5 µg/m3
3:00 AM EVG O3 8 Good 46 50 PPB
3:00 AM FOS NO2 1 Good 1 1 PPB
3:00 AM FOS O3 8 Moderate 51 55 PPB
3:00 AM FTC CO 8 Good 0 0.0 PPM
3:00 AM FTC O3 8 Good 50 54 PPB
3:00 AM FTCF PM10 24 Good 20 22 µg/m3
3:00 AM FTCF PM2.5 24 Good 28 5 µg/m3
3:00 AM FTCW O3 8 Good 49 53 PPB
3:00 AM GJPB PM10 24 Good 14 15 µg/m3
3:00 AM GJPB PM2.5 24 Good 24 4 µg/m3
3:00 AM GREH PM10 24 Good 21 23 µg/m3
3:00 AM GREH PM2.5 24 Good 28 5 µg/m3
3:00 AM GRET CO 8 Good 0 0.0 PPM
3:00 AM GRET O3 8 Good 45 49 PPB
3:00 AM HLD O3 8 Good 44 48 PPB
3:00 AM I25DEN CO 8 Good 2 0.2 PPM
3:00 AM I25DEN NO2 1 Good 17 18 PPB
3:00 AM I25DEN PM10 24 Good 33 36 µg/m3
3:00 AM I25DEN PM2.5 24 Good 47 8 µg/m3
3:00 AM I25GLO NO2 1 Good 17 18 PPB
3:00 AM I25GLO PM10 24 Good 38 41 µg/m3
3:00 AM I25GLO PM2.5 24 Good 44 7 µg/m3
3:00 AM LAST NO2 1 Good 3 3 PPB
3:00 AM LAST O3 8 Good 44 47 PPB
3:00 AM LMB PM10 24 Good 31 33 µg/m3
3:00 AM LMB PM2.5 24 Good 29 5 µg/m3
3:00 AM LNGM PM10 24 Good 25 27 µg/m3
3:00 AM LNGM PM2.5 24 Good 37 6 µg/m3
3:00 AM MAN O3 8 Good 43 46 PPB
3:00 AM MFP NO2 1 Good 1 1 PPB
3:00 AM MFP O3 8 Moderate 58 57 PPB
3:00 AM NJH PM10 24 Good 30 32 µg/m3
3:00 AM NJH PM2.5 24 Good 42 7 µg/m3
3:00 AM NREL O3 8 Good 44 47 PPB
3:00 AM PAG PM10 24 Good 31 33 µg/m3
3:00 AM PAG PM2.5 24 Good 25 4 µg/m3
3:00 AM PAL O3 8 Good 47 51 PPB
3:00 AM PFS PM10 24 Good 39 42 µg/m3
3:00 AM PFS PM2.5 24 Good 31 5 µg/m3
3:00 AM PMS PM2.5 24 Good 34 6 µg/m3
3:00 AM PWES O3 8 Good 42 45 PPB
3:00 AM RFN NO2 1 Good 2 2 PPB
3:00 AM RFN O3 8 Good 46 50 PPB
3:00 AM RIFL PM2.5 24 Good 30 5 µg/m3
3:00 AM RIFLO3 O3 8 Good 44 48 PPB
3:00 AM SSMB PM10 24 Good 19 20 µg/m3
3:00 AM SSMB PM2.5 24 Good 21 3 µg/m3
3:00 AM TEL PM10 24 Good 27 29 µg/m3
3:00 AM TEL PM2.5 24 Good 21 3 µg/m3
3:00 AM TIM O3 8 Good 49 53 PPB
3:00 AM TIM PM10 24 Good 21 23 µg/m3
3:00 AM TIM PM2.5 24 Good 25 4 µg/m3
3:00 AM WBY NO2 1 Good 9 10 PPB
3:00 AM WBY NO2 1 Good 9 10 PPB
3:00 AM WBY O3 8 Good 33 36 PPB
3:00 AM WBY PM10 24 Good 31 34 µg/m3
3:00 AM WBY PM2.5 24 Good 36 6 µg/m3
3:00 AM WBY SO2 1 Good 1 1 PPB
3:00 AM WBY SO2 1 Good 1 1 PPB
2:00 AM ACAD O3 8 Good 38 41 PPB
2:00 AM ACC PM10 24 Good 25 27 µg/m3
2:00 AM ACC PM2.5 24 Good 41 7 µg/m3
2:00 AM ADB PM10 24 Good 33 36 µg/m3
2:00 AM ADB PM2.5 24 Good 41 7 µg/m3
2:00 AM ALA PM10 24 Good 32 35 µg/m3
2:00 AM ALA PM2.5 24 Good 29 5 µg/m3
2:00 AM ASPN O3 8 Good 42 45 PPB
2:00 AM ASPN2 PM10 24 Good 22 24 µg/m3
2:00 AM ASPN2 PM2.5 24 Good 19 3 µg/m3
2:00 AM AURE O3 8 Good 44 47 PPB
2:00 AM BHWK O3 8 Good 48 52 PPB
2:00 AM BOU PM10 24 Good 26 28 µg/m3
2:00 AM BOU PM2.5 24 Good 28 5 µg/m3
2:00 AM BOUR O3 8 Good 48 52 PPB
2:00 AM CAMP NO2 1 Good 3 3 PPB
2:00 AM CAMP NO2 1 Good 3 3 PPB
2:00 AM CAMP O3 8 Good 37 40 PPB
2:00 AM CAMP PM10 24 Good 21 23 µg/m3
2:00 AM CAMP PM2.5 24 Good 42 7 µg/m3
2:00 AM CAN PM10 24 Good 35 38 µg/m3
2:00 AM CAN PM2.5 24 Good 33 6 µg/m3
2:00 AM CASA CO 8 Good 1 0.1 PPM
2:00 AM CASA NO2 1 Good 6 6 PPB
2:00 AM CASA O3 8 Good 38 41 PPB
2:00 AM CASA PM10 24 Good 30 32 µg/m3
2:00 AM CASA PM2.5 24 Good 38 6 µg/m3
2:00 AM CCOL PM10 24 Good 38 41 µg/m3
2:00 AM CCOL PM2.5 24 Good 34 6 µg/m3
2:00 AM CHAT PM10 24 Good 21 23 µg/m3
2:00 AM CHAT PM2.5 24 Good 33 5 µg/m3
2:00 AM CTZ O3 8 Good 33 36 PPB
2:00 AM DELT PM10 24 Good 35 38 µg/m3
2:00 AM DELT PM2.5 24 Good 32 5 µg/m3
2:00 AM DELT PM2.5 24 Good 32 5 µg/m3
2:00 AM EVG O3 8 Good 48 52 PPB
2:00 AM FOS O3 8 Moderate 54 56 PPB
2:00 AM FTC CO 8 Good 0 0.0 PPM
2:00 AM FTC O3 8 Moderate 51 55 PPB
2:00 AM FTCF PM10 24 Good 20 22 µg/m3
2:00 AM FTCF PM2.5 24 Good 28 5 µg/m3
2:00 AM FTCW O3 8 Good 49 53 PPB
2:00 AM GJPB PM10 24 Good 14 15 µg/m3
2:00 AM GJPB PM2.5 24 Good 24 4 µg/m3
2:00 AM GREH PM10 24 Good 21 23 µg/m3
2:00 AM GREH PM2.5 24 Good 28 5 µg/m3
2:00 AM GRET CO 8 Good 0 0.0 PPM
2:00 AM GRET O3 8 Good 47 51 PPB
2:00 AM HLD O3 8 Good 48 52 PPB
2:00 AM I25DEN CO 8 Good 3 0.3 PPM
2:00 AM I25DEN NO2 1 Good 9 10 PPB
2:00 AM I25DEN PM10 24 Good 33 36 µg/m3
2:00 AM I25DEN PM2.5 24 Good 47 8 µg/m3
2:00 AM I25GLO NO2 1 Good 7 7 PPB
2:00 AM I25GLO PM10 24 Good 39 42 µg/m3
2:00 AM I25GLO PM2.5 24 Good 43 7 µg/m3
2:00 AM LAST NO2 1 Good 2 2 PPB
2:00 AM LAST O3 8 Good 44 47 PPB
2:00 AM LMB PM10 24 Good 31 33 µg/m3
2:00 AM LMB PM2.5 24 Good 28 5 µg/m3
2:00 AM LNGM PM10 24 Good 25 27 µg/m3
2:00 AM LNGM PM2.5 24 Good 38 6 µg/m3
2:00 AM MAN O3 8 Good 44 48 PPB
2:00 AM MFP O3 8 Moderate 54 56 PPB
2:00 AM NJH PM10 24 Good 30 32 µg/m3
2:00 AM NJH PM2.5 24 Good 42 7 µg/m3
2:00 AM NREL O3 8 Good 46 50 PPB
2:00 AM PAG PM10 24 Good 31 33 µg/m3
2:00 AM PAG PM2.5 24 Good 25 4 µg/m3
2:00 AM PAL O3 8 Good 48 52 PPB
2:00 AM PFS PM10 24 Good 38 41 µg/m3
2:00 AM PFS PM2.5 24 Good 31 5 µg/m3
2:00 AM PMS PM2.5 24 Good 34 6 µg/m3
2:00 AM PWES O3 8 Good 44 47 PPB
2:00 AM RFN NO2 1 Good 4 4 PPB
2:00 AM RFN O3 8 Good 49 53 PPB
2:00 AM RIFL PM2.5 24 Good 31 5 µg/m3
2:00 AM RIFLO3 O3 8 Good 46 50 PPB
2:00 AM SSMB PM10 24 Good 19 20 µg/m3
2:00 AM SSMB PM2.5 24 Good 22 3 µg/m3
2:00 AM TEL PM10 24 Good 28 30 µg/m3
2:00 AM TEL PM2.5 24 Good 21 3 µg/m3
2:00 AM TIM O3 8 Good 49 53 PPB
2:00 AM TIM PM10 24 Good 21 23 µg/m3
2:00 AM TIM PM2.5 24 Good 25 4 µg/m3
2:00 AM WBY NO2 1 Good 8 9 PPB
2:00 AM WBY NO2 1 Good 8 9 PPB
2:00 AM WBY O3 8 Good 36 39 PPB
2:00 AM WBY PM10 24 Good 31 33 µg/m3
2:00 AM WBY PM2.5 24 Good 36 6 µg/m3
2:00 AM WBY SO2 1 Good 1 1 PPB
2:00 AM WBY SO2 1 Good 1 1 PPB
1:00 AM ACAD O3 8 Good 40 43 PPB
1:00 AM ACC PM10 24 Good 24 26 µg/m3
1:00 AM ACC PM2.5 24 Good 41 7 µg/m3
1:00 AM ADB PM10 24 Good 33 36 µg/m3
1:00 AM ADB PM2.5 24 Good 41 7 µg/m3
1:00 AM ALA PM10 24 Good 32 35 µg/m3
1:00 AM ALA PM2.5 24 Good 30 5 µg/m3
1:00 AM ASPN O3 8 Good 43 46 PPB
1:00 AM ASPN2 PM10 24 Good 22 24 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 20 3 µg/m3
1:00 AM AURE O3 8 Good 46 50 PPB
1:00 AM BHWK O3 8 Good 48 52 PPB
1:00 AM BOU PM10 24 Good 26 28 µg/m3
1:00 AM BOU PM2.5 24 Good 29 5 µg/m3
1:00 AM BOUR O3 8 Good 49 53 PPB
1:00 AM CAMP NO2 1 Good 4 4 PPB
1:00 AM CAMP NO2 1 Good 4 4 PPB
1:00 AM CAMP O3 8 Good 39 42 PPB
1:00 AM CAMP PM10 24 Good 20 22 µg/m3
1:00 AM CAMP PM2.5 24 Good 43 7 µg/m3
1:00 AM CAN PM10 24 Good 35 38 µg/m3
1:00 AM CAN PM2.5 24 Good 34 6 µg/m3
1:00 AM CASA CO 8 Good 1 0.1 PPM
1:00 AM CASA NO2 1 Good 9 10 PPB
1:00 AM CASA O3 8 Good 41 44 PPB
1:00 AM CASA PM10 24 Good 30 32 µg/m3
1:00 AM CASA PM2.5 24 Good 38 6 µg/m3
1:00 AM CCOL PM10 24 Good 39 42 µg/m3
1:00 AM CCOL PM2.5 24 Good 35 6 µg/m3
1:00 AM CHAT PM10 24 Good 21 23 µg/m3
1:00 AM CHAT PM2.5 24 Good 32 5 µg/m3
1:00 AM CTZ O3 8 Good 38 41 PPB
1:00 AM DELT PM10 24 Good 35 38 µg/m3
1:00 AM DELT PM2.5 24 Good 32 5 µg/m3
1:00 AM DELT PM2.5 24 Good 32 5 µg/m3
1:00 AM EVG O3 8 Good 49 53 PPB
1:00 AM FOS O3 8 Moderate 54 56 PPB
1:00 AM FTC CO 8 Good 0 0.0 PPM
1:00 AM FTC O3 8 Moderate 51 55 PPB
1:00 AM FTCF PM10 24 Good 20 22 µg/m3
1:00 AM FTCF PM2.5 24 Good 29 5 µg/m3
1:00 AM FTCW O3 8 Good 50 54 PPB
1:00 AM GJPB PM10 24 Good 14 15 µg/m3
1:00 AM GJPB PM2.5 24 Good 24 4 µg/m3
1:00 AM GREH PM10 24 Good 20 22 µg/m3
1:00 AM GREH PM2.5 24 Good 27 4 µg/m3
1:00 AM GRET CO 8 Good 0 0.0 PPM
1:00 AM GRET O3 8 Good 49 53 PPB
1:00 AM HLD O3 8 Moderate 51 55 PPB
1:00 AM I25DEN CO 8 Good 5 0.4 PPM
1:00 AM I25DEN NO2 1 Good 6 6 PPB
1:00 AM I25DEN PM10 24 Good 33 36 µg/m3
1:00 AM I25DEN PM2.5 24 Good 48 8 µg/m3
1:00 AM I25GLO NO2 1 Good 8 8 PPB
1:00 AM I25GLO PM10 24 Good 38 41 µg/m3
1:00 AM I25GLO PM2.5 24 Good 43 7 µg/m3
1:00 AM LAST NO2 1 Good 2 2 PPB
1:00 AM LAST O3 8 Good 44 48 PPB
1:00 AM LMB PM10 24 Good 30 32 µg/m3
1:00 AM LMB PM2.5 24 Good 28 5 µg/m3
1:00 AM LNGM PM10 24 Good 25 27 µg/m3
1:00 AM LNGM PM2.5 24 Good 38 6 µg/m3
1:00 AM MAN O3 8 Good 46 50 PPB
1:00 AM MFP O3 8 Moderate 51 55 PPB
1:00 AM NJH PM10 24 Good 30 32 µg/m3
1:00 AM NJH PM2.5 24 Good 43 7 µg/m3
1:00 AM NREL O3 8 Good 50 54 PPB
1:00 AM PAG PM10 24 Good 31 33 µg/m3
1:00 AM PAG PM2.5 24 Good 25 4 µg/m3
1:00 AM PAL O3 8 Good 49 53 PPB
1:00 AM PFS PM10 24 Good 38 41 µg/m3
1:00 AM PFS PM2.5 24 Good 31 5 µg/m3
1:00 AM PMS PM2.5 24 Good 34 6 µg/m3
1:00 AM PWES O3 8 Good 44 48 PPB
1:00 AM RFN NO2 1 Good 2 2 PPB
1:00 AM RFN O3 8 Moderate 58 57 PPB
1:00 AM RIFL PM2.5 24 Good 31 5 µg/m3
1:00 AM RIFLO3 O3 8 Good 48 52 PPB
1:00 AM SSMB PM10 24 Good 19 20 µg/m3
1:00 AM SSMB PM2.5 24 Good 22 3 µg/m3
1:00 AM TEL PM10 24 Good 28 30 µg/m3
1:00 AM TEL PM2.5 24 Good 22 3 µg/m3
1:00 AM TIM O3 8 Good 49 53 PPB
1:00 AM TIM PM10 24 Good 21 23 µg/m3
1:00 AM TIM PM2.5 24 Good 25 4 µg/m3
1:00 AM WBY NO2 1 Good 6 6 PPB
1:00 AM WBY NO2 1 Good 6 6 PPB
1:00 AM WBY O3 8 Good 40 43 PPB
1:00 AM WBY PM10 24 Good 31 33 µg/m3
1:00 AM WBY PM2.5 24 Good 36 6 µg/m3

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