Marion County Requests for Redesignation and Maintenance Plans

Following are Requests for Redesignation and Maintenance Plans Indiana has submitted to United States Environmental Protection Agency (U.S. EPA) for Marion County, Indiana, listed by applicable National Ambient Air Quality Standard (NAAQS). Documents specific to a larger geographical region that includes Marion County are provided on the Central Indiana Requests for Redesignation and Maintenance Plans page.

Carbon Monoxide (CO)

1971 8-Hour CO Standard

A small, central downtown portion of Indianapolis makes up the Marion County area designated by U.S. EPA under the 1971 8-hour CO standard.

• Documents - October 15, 2009 to December 21, 1999 [ZIP]
  • Federal Register Notice Concerning U.S. EPA Approval of Carbon Monoxide (CO) Limited Maintenance Plan Update for Marion County, Indiana (October 15, 2009)
  • Carbon Monoxide (CO) Limited Maintenance Plan Update for Marion County, Indiana (January 12, 2009)
  • Federal Register Notice Concerning U.S. EPA Approval of Carbon Monoxide (CO) Request for Redesignation and Limited Maintenance Plan for Marion County, Indiana (January 19, 2000)
  • Carbon Monoxide (CO) Request for Redesignation and Limited Maintenance Plan Submittal for Marion County, Indiana-Transmittal Letter and Request for Redesignation and Maintenance Plan (December 21, 1999)
    • Enclosures A-F

Lead

1978 Annual Lead Standard

A small portion of Franklin Township and a small portion of Wayne Township make up the Marion County area designated by U.S. EPA under the 1978 annual lead standard.

• Documents - September 24, 2009 to April 1, 2009 [ZIP]
  • Federal Register Notice Concerning U.S. EPA Approval of Marion County, Indiana, Lead Maintenance Plan Update (September 24, 2009)
  • Technical Addendum to the Lead Maintenance Plan Update for Marion County, Indiana to Provide Timeline Contingency Measures (July 6, 2009)
  • Technical Addendum to the Lead Maintenance Plan Update for Marion County, Indiana, to Incorporate Projected Emissions Inventories (June 5, 2009)
  • Marion County, Indiana, Lead Redesignation Request and Maintenance Plan Update Submittal-Transmittal Letter and Maintenance Plan Update (April 1, 2009)
    • Appendix A
      • Appendix A, Enclosures A-F
    • Appendix B
    • Appendix C
    • Appendices D-G
• Documents - May 10, 2000 to March 2, 2000 [ZIP]
  • Federal Register Notice Concerning U.S. EPA Approval of the Marion County, Indiana, Lead Request for Redesignation and Maintenance Plan (May 10, 2000)
  • Marion County, Indiana, Lead Request for Redesignation and Maintenance Plan Submittal-Transmittal Letter and Request for Redesignation and Maintenance Plan (March 2, 2000)
    • Enclosures A-F

Sulfur Dioxide (SO2)

2010 Primary 1-Hour SO2 Standard

Center, Perry, and Wayne Townships in Marion County make up the Indianapolis, Indiana area designated by U.S. EPA under the 2010 primary 1-hour SO2 standard.

• Documents - May 21, 2020 to July 10, 2017 [ZIP]
  • Federal Register Notice Concerning U.S. EPA Approval of the Request for Redesignation and Maintenance Plan for the Indianapolis Sulfur Dioxide Nonattainment Area to Attainment (May 21, 2020)
  • Indianapolis, IN Partial Marion County (Center, Perry, and Wayne Townships) 2010 1-Hour Sulfur Dioxide Request for Redesignation and Maintenance Plan Submittal (July 10, 2017)