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Lake and Porter Counties Requests for Redesignation and Maintenance Plans

Following are Requests for Redesignations and Maintenance Plans Indiana has submitted to United States Environmental Protection Agency (U.S. EPA) for Lake and Porter Counties, Indiana, listed by applicable National Ambient Air Quality Standard (NAAQS).

Ozone

2008 8-Hour Ozone Standard
  • Documents – June 28, 2022 to November 30, 2017 [ZIP]
    • Request for Withdrawal of the February 27, 2020 Request for Redesignation and Maintenance Plan for Indiana’s Portion (Lake and Porter Counties) of the Chicago-Naperville, IL-IN-WI, 2008 8-Hour Ozone Nonattainment Area (June 28, 2022)
    • Federal Register Notice Concerning U.S. EPA Approval of the Request for Redesignation and Maintenance Plan for Attainment of Indiana’s Portion (Lake and Porter Counties) of the Chicago-Naperville, Illinois-Indiana-Wisconsin (IL-IN-WI), 2008 8-Hour Nonattainment Area (May 20, 2022)
    • Supplements to the Technical Addendum to Section 182(c)(3) Certification of the Enhanced I/M Program and Request for Redesignation and Maintenance Plan for Attainment of Indiana’s Portion (Lake and Porter Counties) of the Chicago-Naperville, IL-IN-WI, 2008 8-Hour Nonattainment Area (April 8, 2022)
    • Request for Redesignation and Maintenance Plan for Attainment of Indiana’s Portion (Lake and Porter Counties) of the Chicago-Naperville, Illinois-Indiana-Wisconsin (IL-IN-WI), 2008 8-Hour Nonattainment Area (December 6, 2021)
    • Request for Redesignation and Maintenance Plan for Attainment of Indiana’s Portion (Lake and Porter Counties) of the Chicago-Naperville, Illinois-Indiana-Wisconsin (IL-IN-WI), 2008 8-Hour Ozone Nonattainment Area (February 27, 2020)
    • Withdrawal of the Request for Redesignation and Maintenance Plan for Ozone Attainment in Indiana's Portion (Lake and Porter Counties) of the Chicago-Naperville, Illinois-Indiana-Wisconsin (IL-IN-WI), 2008 8-Hour Ozone Nonattainment Area (November 30, 2017)
  • Request for Redesignation and Maintenance Plan for Ozone Attainment in Indiana's Portion (Lake and Porter Counties) of the Chicago-Naperville, Illinois-Indiana-Wisconsin (IL-IN-WI) 2008 8-Hour Ozone Nonattainment Area Submittal (June 15, 2016) [ZIP]:
    • Transmittal Letter and Technical Support Document (TSD) Including Appendices A-F
      • Attachment 1 of Appendix F
      • Attachment 2 of Appendix F and Appendices G-H
  • Documents – December 10, 2014 to December 5, 2012 [ZIP]
    • U.S. EPA’s Disapproval of the Redesignation Request and Maintenance Plan for Lake and Porter Counties, Indiana under the 2008 8-Hour Ozone Standard (December 10, 2014)
    • Indiana’s Response to U.S. EPA’s Proposed Disapproval of the Request and Maintenance Plan for Lake and Porter Counties, Indiana under the 2008 8-Hour Standard (July 29, 2014)
    • Request for Redesignation Petition and Maintenance Plan Under the National Ambient Air Quality Standard for 2008 8-Hour Ozone Nonattainment Area (Lake and Porter Counties, Indiana), Transmittal Letter and Technical Support Document Including Appendices A-B (December 5, 2012)
      • Appendix C
      • Appendix D
      • Appendix E
1997 8-Hour Ozone Standard

Particulate Matter (PM)

1997 Annual Fine Particles (PM2.5) Standard

View redesignation and maintenance plans specific to Lake County

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