Water Quality and Pollution Control in Michigan Sections 303(d), 305(b), and 314 Integrated Report

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2018 Draft Assessment Methodology

The DEQ's Water Resources Division (WRD), is accepting written comments on the draft Assessment Methodology for the 2018 Integrated Report (IR). Every two years, the WRD prepares and submits an IR to the United States Environmental Protection Agency to satisfy the requirements of Sections 303(d), 305(b), and 314 of the federal Clean Water Act. The IR describes the status of water quality in Michigan and includes a list of water bodies that are not attaining Michigan Water Quality Standards and require the establishment of pollutant Total Maximum Daily Loads. The Assessment Methodology includes a description of the data, information, and decision criteria that are used to determine whether Michigan’s Water Quality Standards are attained. The draft Assessment Methodology is available below. Written comments may be submitted to Kevin Goodwin, MDEQ, WRD, P.O. Box 30458, Lansing, Michigan 48909-7958, by July 14, 2017.

Information Contact: Kevin Goodwin, 517-284-5552, goodwink@michigan.gov.

2016 Integrated Report

The Clean Water Act (CWA) requires Michigan to prepare a biennial report on the quality of its water resources as the principal means of conveying water quality protection/monitoring information to the United States Environmental Protection Agency (USEPA) and the United States Congress.  The Integrated Report satisfies the listing requirements of Section 303(d) and the reporting requirements of Section 305(b) and 314 of the CWA.  The Section 303(d) list includes Michigan water bodies that are not attaining one or more designated use and require the establishment of Total Maximum Daily Loads (TMDLs) to meet and maintain Water Quality Standards.  Approval of the 2016 303(d) list was received from the USEPA on February 3, 2017.

Appendix A1 - 8 and 12 Digit Hydrologic Unit Code (HUC) Basins for the Lower Peninsula 

Appendix A2 - 8 and 12 Digit Hydrologic Unit Code (HUC) Basins for the Upper Peninsula 

Appendix B1 - Comprehensive list of assessment unit designated use support (HUCs 04010302 - 04050007) 

Appendix B2 - Comprehensive list of assessment unit designated use support (HUCs 04060101 - 07070001) 

Appendix C - List of assessment units not supporting designated uses and are scheduled for a TMDL (Category 5) 

Appendix D1 - 303(d) list modifications - delistings 

Appendix D2 - 303(d) list modifications - new listings

Appendix E - Public Comment and Response

Appendix F - TMDL Vision

Appendix A1 - 8 and 12 Digit Hydrologic Unit Code (HUC) Basins for the Lower Peninsula 

Appendix A2 - 8 and 12 Digit Hydrologic Unit Code (HUC) Basins for the Upper Peninsula 

Appendix B1 - Comprehensive list of assessment unit designated use support (HUCs 04010302 - 04050007) 

Appendix B2 - Comprehensive list of assessment unit designated use support (HUCs 04060101 - 07070001) 

Appendix C - List of assessment units not supporting designated uses and are scheduled for a TMDL (Category 5) 

Appendix D1 - 303(d) list modifications - delistings 

Appendix D2 - 303(d) list modifications - new listings

Appendix E - Public Comment and Response

Information Contacts: