Colorado.gov: Colorado's Official Website Colorado.gov
Colorado Department of Public Health and Environment

AQI Calculations on 05/21/2012 1:00AM - 5:00AM

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 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.
5:00 AM ACAD O3 8 Good 29 34 PPB
5:00 AM ASP O3 8 Good 19 22 PPB
5:00 AM AURE O3 8 Good 40 47 PPB
5:00 AM CAMP CO 8 Good 2 0.2 PPM
5:00 AM CAMP NO2 1 Good 17 18 PPB
5:00 AM CAMP NO2 1 Good 17 18 PPB
5:00 AM CAMP O3 8 Good 23 27 PPB
5:00 AM CAMP PM2.5 24 Good 21 7 µg/m3
5:00 AM CAMP SO2 1 Good 1 1 PPB
5:00 AM CAMP SO2 1 Good 1 1 PPB
5:00 AM CCOL PM2.5 24 Good 18 5 µg/m3
5:00 AM CHAT O3 8 Good 36 42 PPB
5:00 AM CHAT PM2.5 24 Good 14 4 µg/m3
5:00 AM COMM PM2.5 24 Good 18 6 µg/m3
5:00 AM CRG O3 8 Good 19 23 PPB
5:00 AM CTZ O3 8 Good 31 36 PPB
5:00 AM DMAS CO 8 Good 2 0.2 PPM
5:00 AM DMAS O3 8 Good 19 22 PPB
5:00 AM DMAS PM10 24 Good 14 15 µg/m3
5:00 AM DMAS PM2.5 24 Good 35 11 µg/m3
5:00 AM FTCF PM10 24 Good 35 38 µg/m3
5:00 AM FTCF PM2.5 24 Good 50 15 µg/m3
5:00 AM FTCR O3 8 Good 29 34 PPB
5:00 AM FTCW O3 8 Good 29 34 PPB
5:00 AM GJCT CO 8 Good 1 0.1 PPM
5:00 AM GJPB PM10 24 Good 14 15 µg/m3
5:00 AM GJPB PM2.5 24 Good 25 8 µg/m3
5:00 AM GREA CO 8 Good 1 0.1 PPM
5:00 AM GREH PM2.5 24 Good 19 6 µg/m3
5:00 AM GRET O3 8 Good 20 24 PPB
5:00 AM H24 CO 8 Good 2 0.2 PPM
5:00 AM HLD O3 8 Good 39 46 PPB
5:00 AM LAY O3 8 Good 25 30 PPB
5:00 AM LNGM PM2.5 24 Good 17 5 µg/m3
5:00 AM MAN O3 8 Good 32 38 PPB
5:00 AM NJH PM2.5 24 Good 18 5 µg/m3
5:00 AM NREL O3 8 Good 36 43 PPB
5:00 AM PAL O3 8 Good 28 33 PPB
5:00 AM RFN O3 8 Good 37 44 PPB
5:00 AM RIFL PM10 24 Good 14 15 µg/m3
5:00 AM RIFL PM2.5 24 Good 15 5 µg/m3
5:00 AM RIFLO3 O3 8 Good 20 24 PPB
5:00 AM SBC O3 8 Good 25 30 PPB
5:00 AM WBY CO 8 Good 3 0.3 PPM
5:00 AM WBY NO2 1 Good 25 26 PPB
5:00 AM WBY NO2 1 Good 25 26 PPB
5:00 AM WBY O3 8 Good 15 18 PPB
5:00 AM WBY PM10 24 Good 15 16 µg/m3
5:00 AM WCH O3 8 Good 32 38 PPB
4:00 AM ACAD O3 8 Good 32 38 PPB
4:00 AM ASP O3 8 Good 19 22 PPB
4:00 AM AURE O3 8 Good 39 46 PPB
4:00 AM CAMP CO 8 Good 3 0.3 PPM
4:00 AM CAMP NO2 1 Good 8 8 PPB
4:00 AM CAMP NO2 1 Good 8 8 PPB
4:00 AM CAMP O3 8 Good 22 26 PPB
4:00 AM CAMP PM2.5 24 Good 21 7 µg/m3
4:00 AM CAMP SO2 1 Good 3 2 PPB
4:00 AM CAMP SO2 1 Good 3 2 PPB
4:00 AM CCOL PM2.5 24 Good 18 5 µg/m3
4:00 AM CHAT O3 8 Good 36 42 PPB
4:00 AM CHAT PM2.5 24 Good 14 4 µg/m3
4:00 AM COMM PM2.5 24 Good 18 5 µg/m3
4:00 AM CRG O3 8 Good 19 23 PPB
4:00 AM CTZ O3 8 Good 31 37 PPB
4:00 AM DMAS CO 8 Good 2 0.2 PPM
4:00 AM DMAS O3 8 Good 19 23 PPB
4:00 AM DMAS PM10 24 Good 14 15 µg/m3
4:00 AM DMAS PM2.5 24 Good 35 11 µg/m3
4:00 AM FTCF PM10 24 Good 34 37 µg/m3
4:00 AM FTCF PM2.5 24 Good 50 15 µg/m3
4:00 AM FTCR O3 8 Good 30 35 PPB
4:00 AM FTCW O3 8 Good 31 36 PPB
4:00 AM GJCT CO 8 Good 1 0.1 PPM
4:00 AM GJPB PM10 24 Good 14 15 µg/m3
4:00 AM GJPB PM2.5 24 Good 26 8 µg/m3
4:00 AM GREA CO 8 Good 1 0.1 PPM
4:00 AM GREH PM2.5 24 Good 19 6 µg/m3
4:00 AM GRET O3 8 Good 24 28 PPB
4:00 AM H24 CO 8 Good 1 0.1 PPM
4:00 AM HLD O3 8 Good 39 46 PPB
4:00 AM LAY O3 8 Good 27 32 PPB
4:00 AM LNGM PM2.5 24 Good 16 5 µg/m3
4:00 AM MAN O3 8 Good 35 41 PPB
4:00 AM NJH PM2.5 24 Good 17 5 µg/m3
4:00 AM NREL O3 8 Good 37 44 PPB
4:00 AM PAL O3 8 Good 31 36 PPB
4:00 AM RFN O3 8 Good 38 45 PPB
4:00 AM RIFL PM10 24 Good 14 15 µg/m3
4:00 AM RIFL PM2.5 24 Good 16 5 µg/m3
4:00 AM RIFLO3 O3 8 Good 21 25 PPB
4:00 AM SBC O3 8 Good 27 32 PPB
4:00 AM WBY CO 8 Good 3 0.3 PPM
4:00 AM WBY NO2 1 Good 9 10 PPB
4:00 AM WBY NO2 1 Good 9 10 PPB
4:00 AM WBY O3 8 Good 17 20 PPB
4:00 AM WBY PM10 24 Good 15 16 µg/m3
4:00 AM WCH O3 8 Good 33 39 PPB
3:00 AM ACAD O3 8 Good 36 42 PPB
3:00 AM ASP O3 8 Good 19 22 PPB
3:00 AM AURE O3 8 Good 39 46 PPB
3:00 AM CAMP CO 8 Good 3 0.3 PPM
3:00 AM CAMP NO2 1 Good 7 7 PPB
3:00 AM CAMP NO2 1 Good 7 7 PPB
3:00 AM CAMP O3 8 Good 22 26 PPB
3:00 AM CAMP PM2.5 24 Good 22 7 µg/m3
3:00 AM CAMP SO2 1 Good 3 2 PPB
3:00 AM CAMP SO2 1 Good 3 2 PPB
3:00 AM CCOL PM2.5 24 Good 18 5 µg/m3
3:00 AM CHAT O3 8 Good 36 43 PPB
3:00 AM CHAT PM2.5 24 Good 13 4 µg/m3
3:00 AM COMM PM2.5 24 Good 17 5 µg/m3
3:00 AM CRG O3 8 Good 20 24 PPB
3:00 AM CTZ O3 8 Good 33 39 PPB
3:00 AM DMAS CO 8 Good 2 0.2 PPM
3:00 AM DMAS O3 8 Good 19 22 PPB
3:00 AM DMAS PM10 24 Good 14 15 µg/m3
3:00 AM DMAS PM2.5 24 Good 36 11 µg/m3
3:00 AM FTCF PM10 24 Good 34 37 µg/m3
3:00 AM FTCF PM2.5 24 Moderate 51 16 µg/m3
3:00 AM FTCR O3 8 Good 31 37 PPB
3:00 AM FTCW O3 8 Good 34 40 PPB
3:00 AM GJCT CO 8 Good 1 0.1 PPM
3:00 AM GJPB PM10 24 Good 13 14 µg/m3
3:00 AM GJPB PM2.5 24 Good 26 8 µg/m3
3:00 AM GREA CO 8 Good 1 0.1 PPM
3:00 AM GREH PM2.5 24 Good 19 6 µg/m3
3:00 AM GRET O3 8 Good 27 32 PPB
3:00 AM H24 CO 8 Good 2 0.2 PPM
3:00 AM HLD O3 8 Good 39 46 PPB
3:00 AM LAY O3 8 Good 30 35 PPB
3:00 AM LNGM PM2.5 24 Good 16 5 µg/m3
3:00 AM MAN O3 8 Good 36 43 PPB
3:00 AM NJH PM2.5 24 Good 17 5 µg/m3
3:00 AM NREL O3 8 Good 38 45 PPB
3:00 AM PAL O3 8 Good 32 38 PPB
3:00 AM RFN O3 8 Good 40 47 PPB
3:00 AM RIFL PM10 24 Good 14 15 µg/m3
3:00 AM RIFL PM2.5 24 Good 16 5 µg/m3
3:00 AM RIFLO3 O3 8 Good 23 27 PPB
3:00 AM SBC O3 8 Good 30 35 PPB
3:00 AM WBY CO 8 Good 3 0.3 PPM
3:00 AM WBY NO2 1 Good 14 15 PPB
3:00 AM WBY NO2 1 Good 14 15 PPB
3:00 AM WBY O3 8 Good 18 21 PPB
3:00 AM WBY PM10 24 Good 14 15 µg/m3
3:00 AM WCH O3 8 Good 32 38 PPB
2:00 AM ACAD O3 8 Good 39 46 PPB
2:00 AM ASP O3 8 Good 19 22 PPB
2:00 AM AURE O3 8 Good 39 46 PPB
2:00 AM CAMP CO 8 Good 3 0.3 PPM
2:00 AM CAMP NO2 1 Good 13 14 PPB
2:00 AM CAMP NO2 1 Good 13 14 PPB
2:00 AM CAMP O3 8 Good 24 28 PPB
2:00 AM CAMP PM2.5 24 Good 22 7 µg/m3
2:00 AM CAMP SO2 1 Good 1 1 PPB
2:00 AM CAMP SO2 1 Good 1 1 PPB
2:00 AM CCOL PM2.5 24 Good 18 6 µg/m3
2:00 AM CHAT O3 8 Good 37 44 PPB
2:00 AM CHAT PM2.5 24 Good 13 4 µg/m3
2:00 AM COMM PM2.5 24 Good 17 5 µg/m3
2:00 AM CRG O3 8 Good 22 26 PPB
2:00 AM CTZ O3 8 Good 36 43 PPB
2:00 AM DMAS CO 8 Good 2 0.2 PPM
2:00 AM DMAS O3 8 Good 20 24 PPB
2:00 AM DMAS PM10 24 Good 14 15 µg/m3
2:00 AM DMAS PM2.5 24 Good 35 11 µg/m3
2:00 AM FTCF PM10 24 Good 34 37 µg/m3
2:00 AM FTCF PM2.5 24 Moderate 51 16 µg/m3
2:00 AM FTCR O3 8 Good 34 40 PPB
2:00 AM FTCW O3 8 Good 37 44 PPB
2:00 AM GJCT CO 8 Good 1 0.1 PPM
2:00 AM GJPB PM10 24 Good 14 15 µg/m3
2:00 AM GJPB PM2.5 24 Good 26 8 µg/m3
2:00 AM GREA CO 8 Good 1 0.1 PPM
2:00 AM GREH PM2.5 24 Good 20 6 µg/m3
2:00 AM GRET O3 8 Good 30 35 PPB
2:00 AM H24 CO 8 Good 2 0.2 PPM
2:00 AM HLD O3 8 Good 40 47 PPB
2:00 AM LAY O3 8 Good 32 38 PPB
2:00 AM LNGM PM2.5 24 Good 16 5 µg/m3
2:00 AM MAN O3 8 Good 39 46 PPB
2:00 AM NJH PM2.5 24 Good 18 5 µg/m3
2:00 AM NREL O3 8 Good 39 46 PPB
2:00 AM PAL O3 8 Good 34 40 PPB
2:00 AM RFN O3 8 Good 42 49 PPB
2:00 AM RIFL PM10 24 Good 14 15 µg/m3
2:00 AM RIFL PM2.5 24 Good 16 5 µg/m3
2:00 AM RIFLO3 O3 8 Good 25 29 PPB
2:00 AM SBC O3 8 Good 31 36 PPB
2:00 AM WBY CO 8 Good 3 0.3 PPM
2:00 AM WBY NO2 1 Good 18 19 PPB
2:00 AM WBY NO2 1 Good 18 19 PPB
2:00 AM WBY O3 8 Good 20 24 PPB
2:00 AM WBY PM10 24 Good 14 15 µg/m3
2:00 AM WBY SO2 1 Good 1 1 PPB
2:00 AM WBY SO2 1 Good 1 1 PPB
2:00 AM WCH O3 8 Good 33 39 PPB
1:00 AM ACAD O3 8 Good 41 48 PPB
1:00 AM ASP O3 8 Good 19 22 PPB
1:00 AM AURE O3 8 Good 39 46 PPB
1:00 AM CAMP CO 8 Good 5 0.4 PPM
1:00 AM CAMP NO2 1 Good 5 5 PPB
1:00 AM CAMP NO2 1 Good 5 5 PPB
1:00 AM CAMP O3 8 Good 26 31 PPB
1:00 AM CAMP PM2.5 24 Good 21 7 µg/m3
1:00 AM CCOL PM2.5 24 Good 19 6 µg/m3
1:00 AM CHAT O3 8 Good 39 46 PPB
1:00 AM CHAT PM2.5 24 Good 13 4 µg/m3
1:00 AM COMM PM2.5 24 Good 17 5 µg/m3
1:00 AM CRG O3 8 Good 24 28 PPB
1:00 AM CTZ O3 8 Good 40 47 PPB
1:00 AM DMAS CO 8 Good 2 0.2 PPM
1:00 AM DMAS O3 8 Good 23 27 PPB
1:00 AM DMAS PM10 24 Good 13 14 µg/m3
1:00 AM DMAS PM2.5 24 Good 36 11 µg/m3
1:00 AM FTCF PM10 24 Good 34 37 µg/m3
1:00 AM FTCF PM2.5 24 Moderate 52 16 µg/m3
1:00 AM FTCR O3 8 Good 37 44 PPB
1:00 AM FTCW O3 8 Good 40 47 PPB
1:00 AM GJCT CO 8 Good 1 0.1 PPM
1:00 AM GJPB PM10 24 Good 14 15 µg/m3
1:00 AM GJPB PM2.5 24 Good 26 8 µg/m3
1:00 AM GREA CO 8 Good 1 0.1 PPM
1:00 AM GREH PM2.5 24 Good 21 7 µg/m3
1:00 AM GRET O3 8 Good 34 40 PPB
1:00 AM H24 CO 8 Good 2 0.2 PPM
1:00 AM HLD O3 8 Good 41 48 PPB
1:00 AM LAY O3 8 Good 35 41 PPB
1:00 AM LNGM PM2.5 24 Good 16 5 µg/m3
1:00 AM MAN O3 8 Good 41 48 PPB
1:00 AM NJH PM2.5 24 Good 18 6 µg/m3
1:00 AM NREL O3 8 Good 41 48 PPB
1:00 AM PAL O3 8 Good 36 42 PPB
1:00 AM RFN O3 8 Good 44 52 PPB
1:00 AM RIFL PM10 24 Good 14 15 µg/m3
1:00 AM RIFL PM2.5 24 Good 17 5 µg/m3
1:00 AM RIFLO3 O3 8 Good 28 33 PPB
1:00 AM SBC O3 8 Good 33 39 PPB
1:00 AM WBY CO 8 Good 3 0.3 PPM
1:00 AM WBY NO2 1 Good 21 22 PPB
1:00 AM WBY NO2 1 Good 21 22 PPB
1:00 AM WBY O3 8 Good 25 29 PPB
1:00 AM WBY PM10 24 Good 14 15 µg/m3
1:00 AM WBY SO2 1 Good 1 1 PPB
1:00 AM WBY SO2 1 Good 1 1 PPB
1:00 AM WCH O3 8 Good 35 41 PPB

* All data are reported in Mountain Standard Time (MST). During daylight savings time add one hour to the reported hour.
 
© Colorado Department of Public Health and Environment, Denver, CO