303d list

The Agency has prepared a list of impaired waters to fulfill the requirements set forth in Section 303(d) of the federal Clean Water Act and the Water Quality Planning and Management regulation at 40 CFR Part 130. The report also provides information about the Total Maximum Daily Load program/process in Illinois.

2020/2022

• 2020/2022 Integrated Report Public Notice and Comment Period (February 14, 2022 to March 16, 2022)
• Illinois Integrated Water Quality Report and Section 303(d) List – 2020/2022
• Appendix A-1. Specific Assessment Information for Streams, 2020/2022
• Appendix A-2. Specific Assessment Information for Lakes, 2020/2022
• Appendix A-3. Specific Assessment Information for Lake Michigan, 2020/2022
• Appendix A-4. Statewide Resource Quality Summary for Significant Publicly Owned Lakes, 2020/2022
• Appendix B-1. Using Large Continuous Monitoring Datasets to Assess Attainment of Aquatic Life Use at Some Illinois Stream Sites
• Appendix B-2. A New Method to Apply Chronic Water Quality Standards When Assessing Attainment of Aquatic Life Uses in Illinois Waters
• Appendix B-3. Data Packages Submitted to Illinois EPA for Consideration in Preparing the 2020/2022 Integrated Report
• Appendix B-4. Total Nitrogen, Sedimentation/Siltation, and Other Non-Standards-Based Pollutants as Causes of Use Impairment in the Integrated 305(b)/303(d) Water Quality Report
• Appendix C-1. 303(d) List (In Priority Order)
• Appendix C-2. 303(d) List (In Alphabetical Order)
• Appendix C-3. Illinois Two Year Schedule for TMDL Development, 2022 - 2024
• Appendix C-4. Segments/Causes Removed From Illinois' 2018 Section 303(d) List
• Appendix C-5. Long-term Vision for Assessment, Restoration and Protection under Section 303(d) Program
• Appendix C-6. Status of TMDL Development in Illinois
• Appendix C-7. Illinois Waters in Category 4C (Impairment not caused by pollutants)
• Appendix D. Changes in Assessment Unit IDs Between 2018 and 2022

2018

• 2018 Integrated Report Original Public Notice and Comment Period (June 15 to July 16, 2018)
• Second Public Notice and Comment Period (May 9, to May 24, 2019) on Revisions to Use-Attainment Determinations and Caues of Impairment
• Revisions of Selected Assessment Units for Cycle 2018 Integrated Report

Final as submitted to USEPA, Region 5 on February 22, 2021

• 2018 Integrated Report Transmittal Letter from Illinois EPA to U.S. EPA
  llinois Integrated Water Quality Report and Section 303(d) List – 2018

USEPA Approval of the 2018 Integrated Report on March 19, 2021

• USEPA Approval Letter
• USEPA Decision Document
• Table 1.  Waters and Impairments Approved on Illinois’ 2018 303(d) List
• Table 2.  Waters and Impairments Added to Illinois’ 2018 303(d) List
• Table 3.  Waters and Impairments Removed from Illinois’ 2016 303(d) List

2016

• 2016 Integrated Report Public Notice
• 2016 Integrated Report Transmittal Letter

• Illinois Integrated Water Quality Report and Section 303(d) List - Volume I: Surface Water - 2016
• • Appendix A-1. 303(d) List (In Priority Order)
  • Appendix A-2. 303(d) List (In Alphabetical Order)
  • Appendix A-3. Illinois Two Year Schedule for TMDL Development, 2016 - 2018
  • Appendix A-4. Segments/Causes Removed From Illinois' 2014 303(d) List
  • Appendix A-5. Maps
  • Appendix A-6. Status of TMDL Development in Illinois
  • Appendix A-7. Illinois EPA Projects in TMDL Watersheds
  • Appendix A-8. Illinois Waters in Category 4C (Impairment not caused by pollutants).
  • Appendix B-1. Illinois EPA Basins
  • Appendix B-2. Specific Assessment Information for Streams, 2016
  • Appendix B-3. Specific Assessment Information for Inland Lakes, 2016
  • Appendix B-4. Specific Assessment Information for Lake Michigan Waters, 2016
  • Appendix C. Statewide Resource Quality Summary For Significant Publicly Owned Lakes, 2016
  • Appendix D. Changes in Assessment Unit IDs Between 2014 and 2016
  • Appendix E. Form for evaluating compliance with Offensive Conditions
  • Appendix F. Long-term Vision for Assessment, Restoration and Protection under Section 303(d) of the Clean Water Act, September 16, 2015
  • Appendix G. Responsiveness Summary, July 11, 2016
• Illinois Integrated Water Quality Report and Section 303(d) List - Volume II: Groundwater - 2016
• • Groundwater Appendix A - Source Water Data for 2016 Groundwater Use Assessments

2014

2012

2010

2008

2006

2004

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