CDPHE - Colorado.gov/AirQuality

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.

Forecasts & Monitoring

Air Quality Resources

About

All Colorado Advisories

Front Range/Denver Advisories

Other Colorado Advisories

Avisos en Español (Front Range)

Avisos en Español (Colorado)

Air Quality Report View

Air Toxics &
Ozone Precursor Data

Air Quality Map View

Open Burning Forecast

Air Quality Email Alerts

Air Quality Today

Smoke Management Program

Colorado Smoke Blog

Prescribed Fire Map

Technical Reports

Permit Modeling

Monitoring Guidance

Sources of Air Pollution Map

Meteorology Data Selector Map

Wildfire Smoke Information

Ozone Information

Ozone Action Day Tally

Ozone Summary Table

Particulates Summary Table

Live Image of Denver

Air Quality Forecasts & Advisories

Air Quality Reporting Systems

Air Quality Index (AQI)

National Standards (NAAQS)

Monitoring Site Information

Technical Services Program

Air Pollution Control Division

Air Toxics and Ozone Precursor Data Repository

National Air Toxics Trends Data & Reports
State Air Toxics Trends & Data Reports
Oil and Gas Activity Monitoring Data & Reports
Fenceline Monitoring Data & Reports
Community Air Toxics Monitoring Data & Reports
Ozone Precursor Monitoring Data & Reports
Special Studies

National Air Toxics Trends Data & Reports

Reports
2016 CO National Air Toxics Trends Report [GJ_2016_NATTS_report_final_5-24-18.pdf] (6,234KB) (May 2018)
2015 CO National Air Toxics Trends Report [GJ 2015 NATTS report final.pdf] (5,353KB) (August 2017)
2014 CO National Air Toxics Trends Report [GJ2014AirToxicsReport.pdf] (5,463KB)
2013 CO National Air Toxics Trends Report [GJ2013AirToxicsReport.pdf] (9,200KB)
2012 CO National Air Toxics Trends Report [GJ2012AirToxicsReport.pdf] (9,062KB)
2011 CO National Air Toxics Trends Report [GJ2011AirToxicsReport.pdf] (1,888KB)
2010 CO National Air Toxics Trends Report [GJ2010AirToxicsReport.pdf] (1,918KB)
2009 CO National Air Toxics Trends Report [GJ2009AirToxicsReport.pdf] (1,576KB)
2008 CO National Air Toxics Trends Report [GRANDJunction 2008 Report_FINAL.pdf] (1,067KB)
2007 CO National Air Toxics Trends Report [GJ2007AirToxicsReport.pdf] (4,382KB)
2006 CO National Air Toxics Trends Report [GJ2006AirToxicsReport.pdf] (4,041KB)
2005 CO National Air Toxics Trends Report [GJ2005AirToxicsReport.pdf] (4,022KB)
2004 CO National Air Toxics Trends Report [GJ2004AirToxicsReport.pdf] (4,878KB)

State Air Toxics Trends & Data Reports

Phase I of the program will be fully operational by January 1, 2024 with the first report expected by July 1, 2025. This report will be presented to the public in two outreach sessions to solicit comments on the monitoring program.
Phase II of the program will be fully operational by July 1, 2025.

Oil and Gas Activity Monitoring Data & Reports

Oil & Gas Community Investigations [https://cdphe.colorado.gov/oil-and-gas-and-your-health/oil-and-gas-community-investigations]
OGHIR Summary of Reported Concerns [https://cdphe.colorado.gov/oil-and-gas-and-your-health/oil-and-gas-community-investigations]
Reports from Colorado oil and gas community investigations are available. To request a report, please email cdphe_oghealth@state.co.us.
Oil & Gas Health Information Response Data (OGHIR)
06/2023 Commerce City North Denver Lorraine Granado [CCND_LorraineGranado_Data_r1.zip] (20,124KB)
08/2022 Cub Creek Knight [CubCreek_Knight_Data_r1.zip] (15,538KB)
07/2021 Commerce City North Denver Eagle Pointe [CCND_EaglePointe_Data_r1.zip] (812KB)
04/2021 CAMML VOC Statement of Errata [CAMML_VOC_Statement_of_Errata_20200429_English.pdf] (168KB)
04/2021 CAMML VOC Aclaración de Error [CAMML_VOC_Statement of Errata_20200429_Spanish.pdf] (29KB)
02/2021 Great Western Ivey [GreatWestern_Ivey_Data_r1.zip] (3,600KB)
10/2020 Extraction Vetting (Bella Romero) [Extraction_Vetting_Data_r3.zip] (23,835KB)
06/2020 Extraction Livingston [Extraction_Livingston_Data.zip] (33,698KB)
01/2019 Extraction Rinn Valley [Extraction_RinnValley_Data_r2.zip] (3,498KB)
09/2018 Great Western Dittmer [Great_Western_Dittmer_Data.zip] (457KB)
11/2017 Crestone Pratt [Crestone_Pratt_Data_r2.zip] (7,975KB)
06/2017 Crestone Waste Connections [Crestone_Waste_Connections_Data.zip] (690KB)
03/2017 Crestone Woolley Sosa [Crestone_Woolley_Sosa_Data.zip] (724KB)

Fenceline Monitoring Data & Reports

Suncor - First report expected 04/2023
Facility Fenceline Monitoring Data [https://suncor.data.spectrumenvsoln.com/data]
Phillips 66 Terminal - First report expected 11/2024
Facility Fenceline Monitoring Data [https://phillips66denverfenceline.sensible-edp.com/Home]
Holly Energy Partners (Sinclair) Terminal - First report expected 11/2024
Facility Fenceline Monitoring Data [https://holly.data.spectrumenvsoln.com/]
Goodrich Corporation (Collins Aerospace) - First report expected 11/2024
Facility Fenceline Monitoring Data [https://goodrichpueblofenceline.sensible-edp.com/]

Community Air Toxics Monitoring Data & Reports

Mobile Community Air Toxics Data
Quarter 2, 2024 (Apr - June)
Suncor and Phillips 66 Terminal route
Quarterly Data Packet [2024_Q2_Commerce City-Suncor & Phillips 66.xlsx] (9,943KB)
Holly Energy Partners (Sinclair) Terminal route
Quarterly Data Packet [2024_Q2_N. Commerce City-HEP Terminal.xlsx] (8,740KB)
Goodrich Corporation (Collins Aerospace) route
Quarterly Data Packet [2024_Q2_Pueblo- Goodrich Corp. (Collins Aerospace).xlsx] (14,040KB)
Readme File [HB21-1189 Q2 2024 read me.pdf] (267KB)
Quarter 1, 2024 (Jan - Mar)
Suncor and Phillips 66 Terminal route
Quarterly Data Packet [2024_Q1_Commerce City-Suncor & Phillips 66.xlsx] (12,029KB)
Holly Energy Partners (Sinclair) Terminal route
Quarterly Data Packet [2024_Q1_N. Commerce City-HEP Terminal.xlsx] (11,129KB)
Goodrich Corporation (Collins Aerospace) route
Quarterly Data Packet [2024_Q1_Pueblo- Goodrich Corp. (Collins Aerospace).xlsx] (9,521KB)
Readme File [HB21-1189 Q1 2024 read me.pdf] (268KB)
Quarter 4, 2023 (Oct - Dec)
Suncor and Phillips 66 Terminal route
Quarterly Data Packet [2023_Q4_Commerce City-Suncor & Phillips 66.xlsx] (6,865KB)
Holly Energy Partners (Sinclair) Terminal route
Quarterly Data Packet [2023_Q4_N. Commerce City-HEP Terminal.xlsx] (7,332KB)
Goodrich Corporation (Collins Aerospace) route
Quarterly Data Packet [2023_Q4_Pueblo- Goodrich Corp. (Collins Aerospace).xlsx] (8,432KB)
Readme File [HB21-1189 Q4 2023 read me.pdf] (266KB)
Quarter 3, 2023 (July - Sept)
Suncor and Phillips 66 Terminal route
Quarterly Data Packet [2023_Q3_Commerce City-Suncor & Phillips 66.xlsx] (7,961KB)
Holly Energy Partners (Sinclair) Terminal route
Quarterly Data Packet [2023_Q3_N. Commerce City-HEP Terminal.xlsx] (6,772KB)
Goodrich Corporation (Collins Aerospace) route
Quarterly Data Packet [2023_Q3_Pueblo- Goodrich Corp. (Collins Aerospace).xlsx] (7,416KB)
Readme File [HB21-1189 Q3 2023 read me.pdf] (267KB)
Quarter 2, 2023 (Apr - June)
Suncor and Phillips 66 Terminal route
Quarterly Data Packet [2023_Q2_Commerce City-Suncor & Phillips 66.xlsx] (5,897KB)
Holly Energy Partners (Sinclair) Terminal route
Quarterly Data Packet [2023_Q2_N. Commerce City-HEP Terminal.xlsx] (6,925KB)
Goodrich Corporation (Collins Aerospace) route
Quarterly Data Packet [2023_Q2_Pueblo- Goodrich Corp. (Collins Aerospace).xlsx] (6,526KB)
Readme File [HB21-1189 Q2 2023 read me.pdf] (241KB)
Quarter 1, 2023 (Jan - Mar)
Suncor and Phillips 66 Terminal route
Quarterly Data Packet [2023_Q1_Commerce City-Suncor & Phillips 66.xlsx] (5,382KB)
Holly Energy Partners (Sinclair) Terminal route
Quarterly Data Packet [2023_Q1_N. Commerce City-HEP Terminal.xlsx] (6,689KB)
Readme File [HB21-1189 Q1 2023 read me.pdf] (233KB)
Stationary Community Air Toxics Monitoring for HB21-1189
January 2023
Monthly Summary Report [202301_SCATM_Monthly_Report.pdf] (324KB)
Monthly Data Summary [202301_SCATM_Monthly_Data_Summary.xlsx] (655KB)
February 2023
Monthly Summary Report [202302 SCATM Monthly Report.pdf] (1,227KB)
Monthly Data Summary [202302 SCATM Monthly Data Summary.xlsx] (609KB)
March 2023
Monthly Summary Report [202303 SCATM Monthly Report.pdf] (1,193KB)
Monthly Data Summary [202303 SCATM Monthly Data Summary.xlsx] (792KB)
April 2023
Monthly Summary Report [202304 SCATM Monthly Report.pdf] (1,122KB)
Monthly Data Summary [202304 SCATM Monthly Data Summary.xlsx] (777KB)
May 2023
Monthly Summary Report [202305 SCATM Monthly Report.pdf] (1,170KB)
Monthly Data Summary [202305 SCATM Monthly Data Summary.xlsx] (736KB)
June 2023
Monthly Summary Report [202306 SCATM Monthly Report.pdf] (1,137KB)
Monthly Data Summary [202306 SCATM Monthly Data Summary.xlsx] (721KB)
July 2023
Monthly Summary Report [202307 SCATM Monthly Report.pdf] (1,155KB)
Monthly Data Summary [202307 SCATM Monthly Data Summary.xlsx] (734KB)
August 2023
Monthly Summary Report [202308 SCATM Monthly Report.pdf] (1,178KB)
Monthly Data Summary [202308 SCATM Monthly Data Summary.xlsx] (674KB)
September 2023
Monthly Summary Report [202309 SCATM Monthly Report.pdf] (1,179KB)
Monthly Data Summary [202309 SCATM Monthly Data Summary.xlsx] (706KB)
October 2023
Monthly Summary Report [202310 SCATM Monthly Report.pdf] (1,143KB)
Monthly Data Summary [202310 SCATM Monthly Data Summary.xlsx] (726KB)
November 2023
Monthly Summary Report [202311 SCATM Monthly Report.pdf] (1,123KB)
Monthly Data Summary [202311 SCATM Monthly Data Summary.xlsx] (701KB)
December 2023
Monthly Summary Report [202312 SCATM Monthly Report.pdf] (1,094KB)
Monthly Data Summary [202312 SCATM Monthly Data Summary.xlsx] (464KB)

Ozone Precursor Monitoring Data & Reports

2023 CO Ozone Precursor Data [Raw CDPHE Precursor Summary_Data-2023.xlsx] (1,445KB) (November 2024)
2022 CO Ozone Precursor Data [Raw CDPHE Precursor Summary_Data-2022.xlsx] (1,511KB) (October 2023)
2021 CO Ozone Precursor Data [Raw CDPHE Precursor Summary_Data-2021.xlsx] (1,270KB) (October 2023)
2020 CO Ozone Precursor Data [RawCDPHEPrecursorData-2020.xlsx] (675KB) (April 2021)
2019 CO Ozone Precursor Data [RawCDPHEPrecursorData-2019.xlsx] (622KB) (November 2020)
2018 CO Ozone Precursor Data [RawCDPHEPrecursorData-2018.xlsx] (580KB) (February 2019)
2017 CO Ozone Precursor Data [RawCDPHEPrecursorData-2017.xlsx] (585KB) (May 2018)
2016 CO Ozone Precursor Data [RawCDPHEPrecursorData-2016.xlsx] (652KB)
2015 CO Ozone Precursor Data [RawCDPHEPrecursorData-2015.xlsx] (646KB) (May 2018)
2014 CO Ozone Precursor Data [RawCDPHEPrecursorData-2014.xlsx] (962KB) (May 2018)
2013 CO Ozone Precursor Data [RawCDPHEPrecursorData-2013.xlsx] (692KB) (May 2018)
2011 & 2012 CO Ozone Precursor Data [RawCDPHEPrecursorData-2011_2012.xlsx] (1,320KB) (May 2018)

Special Studies

Ethylene Oxide (EtO) - 2024 Study Lakewood, CO
Data Packet [2024 ETO Study Data.xlsx] (56KB)
Summary Report - pending
Ethylene Oxide (EtO) - 2018 Study Lakewood, CO
Data Packet [2018 ETO Study Data.xlsx] (25KB)
Summary Report [APCD_EtO_Air_Sampling_Report_Final11092018.pdf] (4,047KB)
Continuous Airborne Measurements and Analysis of Oil & Natural Gas Emissions During the 2021 Denver-Julesburg Basin Studies
Final Report [CU_UMD_2021_Final_Report.pdf] (5,379KB)
Executive Summary of Interim Report [airborne_measure_denver_julesburg_2021_report_executive_summary.pdf] (404KB)
Interim Report on Proposal Activities & No-Cost Extension Request [airborne_measure_denver_julesburg_2021_report.pdf] (8,192KB)
Flight Track [airborne_measure_denver_julesburg_2021_map_denver_julesburg_track.pdf] (752KB)
2020 Scientific Aviation Aerial Surveys (contact cdphe.commentsapcd@state.co.us for more information)
NCAR FRAPPE and DISCOVER-AQ Source Impact Analysis
NCAR FRAPPE and DISCOVER-AQ Source Impact Analysis- Report [FRAPPE-NCAR_Final_Report_July2017.pdf] (14,735KB)
NCAR FRAPPE and DISCOVER-AQ Source Impact Analysis- Appendix [FRAPPE-NCAR_Final_Report_July2017_Appendix.pdf] (13,625KB)
North Front Range Oil and Gas Air Pollutant Emission and Dispersion Study
North Front Range Oil and Gas Air Pollutant Emission and Dispersion Study - Report [CSU_NFR_Report_Final_20160908.pdf] (2,583KB)
North Front Range Oil and Gas Air Pollutant Emission and Dispersion Study - Data [NFR_Data_Public.zip] (1,103KB)
Air Emissions Case Study Related to Oil and Gas Development in Erie, Colorado 2012 [Erie Air Emissions Case Study 2012 - revised 11252014.pdf] (5,944KB)
Pueblo, Colorado Air Toxics Special Study Around the Rocky Mountain Steel Mill. May 2002 through December 2002. [PuebloAirToxics.pdf] (1,946KB)
2001-2002 Report of Urban Air Toxics In Denver.(Appendices available on request) [UrbanAirToxicsFinal.pdf] (3,716KB)
2002-2003 Report of Urban Air Toxics In Denver.(Appendices available on request) [DenverAirToxics2002-2003_final.pdf] (2,770KB)
Front Range Volatile Organic Carbon Trends Reports
Front Range VOC Data Review 1996-2006 [Front Range VOC Data Review 1996 - 2006.pdf] (6,840KB)
Grand Junction 2001-2002 Air Toxics Pilot Project Report. [GJ2002AirToxicsReport.pdf] (6,527KB)