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 01/14/2026 1:00AM - 1:00AM

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.
1:00 AM ACAD O3 8 Good 20 22 PPB
1:00 AM ACC PM10 24 Good 5 5 µg/m3
1:00 AM ACC PM2.5 24 Good 8 1 µg/m3
1:00 AM ADB PM10 24 Good 30 32 µg/m3
1:00 AM ADB PM2.5 24 Good 24 4 µg/m3
1:00 AM ALA PM10 24 Good 21 23 µg/m3
1:00 AM ALA PM2.5 24 Moderate 53 10 µg/m3
1:00 AM ASPN O3 8 Good 29 31 PPB
1:00 AM ASPN2 PM10 24 Good 10 11 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 16 2 µg/m3
1:00 AM AURE O3 8 Good 35 38 PPB
1:00 AM BHWK O3 8 Good 43 46 PPB
1:00 AM BOU PM10 24 Good 10 11 µg/m3
1:00 AM BOU PM2.5 24 Good 7 1 µg/m3
1:00 AM BOUR O3 8 Good 36 39 PPB
1:00 AM CAMP O3 8 Good 26 28 PPB
1:00 AM CAMP PM10 24 Good 10 11 µg/m3
1:00 AM CAMP PM2.5 24 Good 15 2 µg/m3
1:00 AM CAN PM10 24 Good 7 8 µg/m3
1:00 AM CAN PM2.5 24 Good 7 1 µg/m3
1:00 AM CASA CO 8 Good 1 0.1 PPM
1:00 AM CASA NO2 1 Good 11 12 PPB
1:00 AM CASA O3 8 Good 23 25 PPB
1:00 AM CASA PM10 24 Good 13 14 µg/m3
1:00 AM CASA PM2.5 24 Good 13 2 µg/m3
1:00 AM CCOL PM10 24 Good 13 14 µg/m3
1:00 AM CCOL PM2.5 24 Good 17 3 µg/m3
1:00 AM CHAT PM10 24 Good 4 4 µg/m3
1:00 AM CHAT PM2.5 24 Good 6 1 µg/m3
1:00 AM CTZ O3 8 Good 29 31 PPB
1:00 AM DELT PM10 24 Good 23 25 µg/m3
1:00 AM DELT PM2.5 24 Moderate 52 9 µg/m3
1:00 AM DELT PM2.5 24 Moderate 52 9 µg/m3
1:00 AM EVG O3 8 Good 40 43 PPB
1:00 AM FOS NO2 1 Good 1 1 PPB
1:00 AM FOS O3 8 Good 35 38 PPB
1:00 AM FTC CO 8 Good 1 0.1 PPM
1:00 AM FTC O3 8 Good 35 38 PPB
1:00 AM FTCF PM10 24 Good 7 8 µg/m3
1:00 AM FTCF PM2.5 24 Good 14 2 µg/m3
1:00 AM FTCW O3 8 Good 39 42 PPB
1:00 AM GJPB PM10 24 Good 16 17 µg/m3
1:00 AM GJPB PM2.5 24 Moderate 51 9 µg/m3
1:00 AM GREH PM10 24 Good 23 25 µg/m3
1:00 AM GREH PM2.5 24 Good 45 8 µg/m3
1:00 AM GRET CO 8 Good 1 0.1 PPM
1:00 AM GRET O3 8 Good 35 38 PPB
1:00 AM HLD O3 8 Good 31 33 PPB
1:00 AM I25DEN CO 8 Good 3 0.3 PPM
1:00 AM I25DEN NO2 1 Good 5 5 PPB
1:00 AM I25DEN PM10 24 Good 15 16 µg/m3
1:00 AM I25DEN PM2.5 24 Good 20 3 µg/m3
1:00 AM I25GLO NO2 1 Good 4 4 PPB
1:00 AM I25GLO PM10 24 Good 24 26 µg/m3
1:00 AM I25GLO PM2.5 24 Good 29 5 µg/m3
1:00 AM LAST NO2 1 Good 1 1 PPB
1:00 AM LAST O3 8 Good 32 35 PPB
1:00 AM LMB PM10 24 Good 7 8 µg/m3
1:00 AM LMB PM2.5 24 Good 17 3 µg/m3
1:00 AM LNGM PM10 24 Good 19 20 µg/m3
1:00 AM LNGM PM2.5 24 Good 25 4 µg/m3
1:00 AM MAN O3 8 Good 37 40 PPB
1:00 AM MFP NO2 1 Good 1 1 PPB
1:00 AM MFP O3 8 Good 37 40 PPB
1:00 AM NJH PM10 24 Good 18 19 µg/m3
1:00 AM NJH PM2.5 24 Good 14 2 µg/m3
1:00 AM NREL O3 8 Good 40 43 PPB
1:00 AM PAG PM10 24 Good 35 38 µg/m3
1:00 AM PAG PM2.5 24 Good 35 6 µg/m3
1:00 AM PAL O3 8 Good 21 23 PPB
1:00 AM PFS PM10 24 Good 21 23 µg/m3
1:00 AM PFS PM2.5 24 Good 28 5 µg/m3
1:00 AM PMS PM2.5 24 Good 22 3 µg/m3
1:00 AM PWES O3 8 Good 23 25 PPB
1:00 AM RFN NO2 1 Good 2 2 PPB
1:00 AM RFN O3 8 Good 40 43 PPB
1:00 AM RIFL PM2.5 24 Good 24 4 µg/m3
1:00 AM RIFLO3 O3 8 Good 3 3 PPB
1:00 AM SSMB PM10 24 Good 30 32 µg/m3
1:00 AM SSMB PM2.5 24 Good 39 7 µg/m3
1:00 AM TEL PM10 24 Good 5 5 µg/m3
1:00 AM TEL PM2.5 24 Good 10 1 µg/m3
1:00 AM TIM NO2 1 Good 1 1 PPB
1:00 AM TIM O3 8 Good 33 36 PPB
1:00 AM TIM PM10 24 Good 8 9 µg/m3
1:00 AM TIM PM2.5 24 Good 14 2 µg/m3
1:00 AM WBY NO2 1 Good 2 2 PPB
1:00 AM WBY NO2 1 Good 2 2 PPB
1:00 AM WBY O3 8 Good 32 35 PPB
1:00 AM WBY PM10 24 Good 25 27 µg/m3
1:00 AM WBY PM2.5 24 Good 22 3 µg/m3

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