An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Air Emissions Modeling

SPECIATE

Return to SPECIATE 5.0 Documentation

SPECIATE Documentation Archive

These documents describe the SPECIATE database for earlier versions including SPECIATE 4.5, SPECIATE 4.4, SPECIATE 4.3, SPECIATE 4.2, and SPECIATE 4.0. 

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
  • SPECIATE 4.5 (PDF)(100 pp, 2 MB)
    Speciation Database Development Documentation, Final Report
  • SPECIATE 4.4 (PDF)(290 pp, 4 MB, February 19, 2014)
    Speciation Database Development Documentation, Final Report
  • SPECIATE 4.3 (PDF)(28 pp, 501 K)
    Addendum to SPECIATE 4.2 Speciation Database Development Documentation
  • SPECIATE 4.2 (PDF)(218 pp, 927 K, June 2009)
    Speciation Database Development Documentation
  • SPECIATE 4.0 (PDF)(156 pp, 3 MB, November 2006)
    Database Development Documentation, Final Report, December 2006