In a series of reports, EPA provides updates on the IRIS Program and discusses progress toward implementing recommendations from the 2011 and 2014 reports by the National Research Council (NRC) for improving the development of IRIS assessments. The following progress reports were released in 2011, 2012, 2015, and 2018.

• IRIS Progress Report and Report to Congress. January 2018 (PDF)(7 pp, 69 K, 01/17/2018)
  This report is responsive to the Consolidated Appropriations Act, 2017, as detailed in Senate Report 114-281.
• IRIS Progress Report and Report to Congress. November 2015 (PDF)(10 pp, 173 K, 11/30/2015)
  This report is responsive to the Consolidated and Further Continuing Appropriations Act, 2015, as detailed in House Report 113-551.
• IRIS Progress Report and Report to Congress. February 2015 (PDF)(43 pp, 593 K, 05/01/2015)
  This report is responsive to the Consolidated Appropriations Act, 2014, as detailed in the explanatory statement accompanying the Act that was released in the Congressional Record on January 15, 2014.
• IRIS Progress Report and Report to Congress 2012 (PDF)(29 pp, 1 MB, 06/05/2012)
  This report is responsive to the Consolidated Appropriations Act, 2012, as detailed in House Report 112-331.
• IRIS Progress Report 2011 (PDF)(14 pp, 373 K, 07/11/2011)
  This report was released by EPA in July 2011 to inform stakeholders and the public on efforts to strengthen and streamline the IRIS Program.