Michigan Section 303(d) List

Institute of Water Research
Michigan State University

Clean Water Act Section 303(d) List in Michigan

TMDL
Purpose
The purpose of this report is to fulfill the requirements set forth in Section 303(d) of the Federal Clean Water Act (CWA) and the Water Quality Planning and Management regulation at 40 CFR Part 130. This report is submitted to the U.S. Environmental Protection Agency (U.S. EPA) for review and approval of Michigan's list of water quality limited or threatened waters needing established pollutant Total Maximum Daily Loads (TMDLs). It provides the state's supporting documentation required by 40 CFR 130.7 (b)(6) and rationale in fulfilling Section 303(d) requirements. Michigan is providing its submittal of Section 303(d) requirements as a separate document rather than including it in the State's biennial 305(b) report.

Michigan's Section 303(d) List

Clean Water Act Requirements
Under Section 303(d) requirements of the CWA, states are required to:

Identify waters which will not attain applicable Water Quality Standards (WQS) with technology-based controls. This includes treatment technology, best available technology and Best Management Practices (BMP) enforced by federal, state, or local laws or regulations.
Identify waters which are threatened, which means those waters which presently attain WQS but are expected to exceed standards before April, 2000.
Establish a priority ranking (schedule) for Total Maximum Daily Loads (TMDLs) so that TMDLs are completed in the next 8 to 13 years.

Methodology

MDEQ's Watershed Approach
MDEQ employs a rotating watershed approach to environmental monitoring and National Pollutant Discharge Elimination System (NPDES) permit reissuance. All the watersheds in the state are scheduled for monitoring and permit reissuance once every five years. This allows all NPDES permits in a watershed to be addressed at the same time. Monitoring to support permit issuance is also conducted and focused in the targeted watersheds, and generally conducted two years prior to permit reissuance. This process facilitates the identification of waterbodies which need TMDLs, and the compilation of appropriate information to develop TMDLs.

Static Table

Dyanmic Data Access System

Data Access System
The Michigan's Section 303(d) list has been combined with the EPA's Reach File 3 (Alpha version) to create a GIS/Database access system by the Institute of Water Research. The list is available through:

A static table, or
A dynamic GIS/Database access system

	Clean Water Act Section 303(d) List in Michigan
TMDL	Purpose The purpose of this report is to fulfill the requirements set forth in Section 303(d) of the Federal Clean Water Act (CWA) and the Water Quality Planning and Management regulation at 40 CFR Part 130. This report is submitted to the U.S. Environmental Protection Agency (U.S. EPA) for review and approval of Michigan's list of water quality limited or threatened waters needing established pollutant Total Maximum Daily Loads (TMDLs). It provides the state's supporting documentation required by 40 CFR 130.7 (b)(6) and rationale in fulfilling Section 303(d) requirements. Michigan is providing its submittal of Section 303(d) requirements as a separate document rather than including it in the State's biennial 305(b) report.
Michigan's Section 303(d) List	Clean Water Act Requirements Under Section 303(d) requirements of the CWA, states are required to: Identify waters which will not attain applicable Water Quality Standards (WQS) with technology-based controls. This includes treatment technology, best available technology and Best Management Practices (BMP) enforced by federal, state, or local laws or regulations. Identify waters which are threatened, which means those waters which presently attain WQS but are expected to exceed standards before April, 2000. Establish a priority ranking (schedule) for Total Maximum Daily Loads (TMDLs) so that TMDLs are completed in the next 8 to 13 years.
Methodology	MDEQ's Watershed Approach MDEQ employs a rotating watershed approach to environmental monitoring and National Pollutant Discharge Elimination System (NPDES) permit reissuance. All the watersheds in the state are scheduled for monitoring and permit reissuance once every five years. This allows all NPDES permits in a watershed to be addressed at the same time. Monitoring to support permit issuance is also conducted and focused in the targeted watersheds, and generally conducted two years prior to permit reissuance. This process facilitates the identification of waterbodies which need TMDLs, and the compilation of appropriate information to develop TMDLs.
Static Table Dyanmic Data Access System	Data Access System The Michigan's Section 303(d) list has been combined with the EPA's Reach File 3 (Alpha version) to create a GIS/Database access system by the Institute of Water Research. The list is available through: A static table, or A dynamic GIS/Database access system