CDPHE data is available starting 06/01/2016 and RMNP data and 8 hour CDPHE data starting 05/01/2017. All data is preliminary.
Select a station in legend to toggle on/off in graph. Mouseover a station in legend to highlight trace. Click and drag to expand X or Y axis.
Data is updated at 6 minutes past the hour. Data source: Air Quality Report View page of the Colorado Department of Public Health & Environment, and Rocky Mountain National Park data from the AirNow network.