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Pollutant Standard Index (PSI)

Note: EPA no longer updates this information, but it may be useful as a reference or resource.

Files identified as "ZIP" files must be de-archived using 'PKUNZIP.' Downloading instructions, archivers, and de-archivers are available through "File Compression Utilities" under the TTN Top Menu.

From the listing below, find the file you would like to download. The available file formats are represented by icons on the right side of the listing. Click on the icon that represents the file format you wish to receive. For an explanation of file formats and their icons, see our TTNWeb File Types.


Description Date Bytes Type
Federal Register copy of the 12/09/98 Air Quality Index Reporting (PSI) - Proposed Rule 01-13-99 153903 pdf icon
Draft Guideline for Reporting of Daily Air Quality-Pollutant Standards Index (PSI) 12-09-98   pdf icon
Air Quality Index (PSI) Reporting 12-04-98   pdf icon
Proposed Revisions to the Pollutant Standard Index (PSI)-Fact Sheet 12-03-98   pdf icon
PSI Prototype Program 03-25-98 434688 exe icon
PDF Readme File for 03/25/98 PSI Prototype Program 05-18-98 2937 pdf icon


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