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 12/03/2025 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 33 36 PPB
1:00 AM ACC PM10 24 Good 18 19 µg/m3
1:00 AM ACC PM2.5 24 Good 22 3 µg/m3
1:00 AM ADB PM10 24 Good 42 45 µg/m3
1:00 AM ADB PM2.5 24 Good 37 6 µg/m3
1:00 AM ALA PM10 24 Good 9 10 µg/m3
1:00 AM ALA PM2.5 24 Good 23 4 µg/m3
1:00 AM ASPN O3 8 Good 25 27 PPB
1:00 AM ASPN2 PM10 24 Good 4 4 µg/m3
1:00 AM ASPN2 PM2.5 24 Good 9 1 µg/m3
1:00 AM AURE O3 8 Good 35 38 PPB
1:00 AM BHWK O3 8 Good 38 41 PPB
1:00 AM BOU PM10 24 Good 19 21 µg/m3
1:00 AM BOU PM2.5 24 Good 28 5 µg/m3
1:00 AM BOUR O3 8 Good 23 25 PPB
1:00 AM CAMP NO2 1 Good 8 9 PPB
1:00 AM CAMP NO2 1 Good 8 9 PPB
1:00 AM CAMP O3 8 Good 30 32 PPB
1:00 AM CAMP PM10 24 Good 19 21 µg/m3
1:00 AM CAMP PM2.5 24 Good 34 6 µg/m3
1:00 AM CAN PM10 24 Good 6 7 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 9 10 PPB
1:00 AM CASA O3 8 Good 30 32 PPB
1:00 AM CASA PM10 24 Good 28 30 µg/m3
1:00 AM CASA PM2.5 24 Good 31 5 µg/m3
1:00 AM CCOL PM10 24 Good 9 10 µg/m3
1:00 AM CCOL PM2.5 24 Good 19 3 µg/m3
1:00 AM CHAT O3 8 Good 34 37 PPB
1:00 AM CHAT PM10 24 Good 10 11 µg/m3
1:00 AM CHAT PM2.5 24 Good 16 2 µg/m3
1:00 AM CTZ O3 8 Good 28 30 PPB
1:00 AM DELT PM10 24 Good 9 10 µg/m3
1:00 AM DELT PM2.5 24 Good 35 6 µg/m3
1:00 AM DELT PM2.5 24 Good 35 6 µg/m3
1:00 AM EVG O3 8 Good 36 39 PPB
1:00 AM FOS NO2 1 Good 1 1 PPB
1:00 AM FOS O3 8 Good 19 20 PPB
1:00 AM FTC CO 8 Good 5 0.4 PPM
1:00 AM FTC O3 8 Good 12 13 PPB
1:00 AM FTCF PM10 24 Good 28 30 µg/m3
1:00 AM FTCF PM2.5 24 Good 39 7 µg/m3
1:00 AM FTCW O3 8 Good 25 27 PPB
1:00 AM GJPB PM10 24 Good 6 6 µg/m3
1:00 AM GJPB PM2.5 24 Good 27 4 µg/m3
1:00 AM GREH PM10 24 Good 19 20 µg/m3
1:00 AM GREH PM2.5 24 Good 36 6 µg/m3
1:00 AM GRET CO 8 Good 1 0.1 PPM
1:00 AM GRET O3 8 Good 20 22 PPB
1:00 AM HLD O3 8 Good 34 37 PPB
1:00 AM I25DEN CO 8 Good 2 0.2 PPM
1:00 AM I25DEN NO2 1 Good 14 15 PPB
1:00 AM I25DEN PM10 24 Good 23 25 µg/m3
1:00 AM I25DEN PM2.5 24 Good 38 6 µg/m3
1:00 AM I25GLO NO2 1 Good 9 10 PPB
1:00 AM LAST NO2 1 Good 2 2 PPB
1:00 AM LAST O3 8 Good 26 28 PPB
1:00 AM LMB PM10 24 Good 12 13 µg/m3
1:00 AM LMB PM2.5 24 Good 20 3 µg/m3
1:00 AM LNGM PM10 24 Good 29 31 µg/m3
1:00 AM LNGM PM2.5 24 Good 42 7 µg/m3
1:00 AM MAN O3 8 Good 34 37 PPB
1:00 AM MFP NO2 1 Good 3 3 PPB
1:00 AM MFP O3 8 Good 25 27 PPB
1:00 AM NJH PM10 24 Good 19 21 µg/m3
1:00 AM NJH PM2.5 24 Good 23 4 µg/m3
1:00 AM NREL O3 8 Good 33 36 PPB
1:00 AM PAG PM10 24 Good 9 10 µg/m3
1:00 AM PAG PM2.5 24 Good 18 3 µg/m3
1:00 AM PAL O3 8 Good 19 21 PPB
1:00 AM PFS PM10 24 Good 14 15 µg/m3
1:00 AM PFS PM2.5 24 Good 31 5 µg/m3
1:00 AM PMS PM2.5 24 Good 49 8 µg/m3
1:00 AM PWES O3 8 Good 29 31 PPB
1:00 AM RFN NO2 1 Good 2 2 PPB
1:00 AM RFN O3 8 Good 32 35 PPB
1:00 AM RIFL PM2.5 24 Good 17 3 µg/m3
1:00 AM RIFLO3 O3 8 Good 6 6 PPB
1:00 AM SSMB PM10 24 Good 6 7 µg/m3
1:00 AM SSMB PM2.5 24 Good 21 3 µg/m3
1:00 AM TEL PM10 24 Good 2 2 µg/m3
1:00 AM TEL PM2.5 24 Good 6 1 µg/m3
1:00 AM TIM NO2 1 Good 1 1 PPB
1:00 AM TIM O3 8 Good 24 26 PPB
1:00 AM TIM PM10 24 Good 16 17 µg/m3
1:00 AM TIM PM2.5 24 Good 23 4 µg/m3
1:00 AM WBY NO2 1 Good 7 7 PPB
1:00 AM WBY NO2 1 Good 7 7 PPB
1:00 AM WBY O3 8 Good 29 31 PPB
1:00 AM WBY PM10 24 Good 26 28 µg/m3
1:00 AM WBY PM2.5 24 Good 27 4 µg/m3

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