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Water: Total Maximum Daily Loads (303d)

Table of Contents


Guidance for Water Quality-Based Decisions:
The TMDL Process

CHAPTER 1 -- INTRODUCTION

Purpose and Summary
Policies and Priniciples
Clean Water Act Section 303(d)
Water Quality Planning and Management Regulation

CHAPTER 2 -- THE WATER QUALITY-BASED APPROACH TO POLLUTION CONTROL

Step One: Identification of Water Quality-Limited Waters
Step Two: Priority Ranking and Targeting
Step Three: TMDL Development1
Step Four: Implementation of Control Actions
Step Five: Assessment of Water Quality-Based Control Actions

CHAPTER 3 -- DEVELOPMENT AND IMPLEMENTATION OF THE TMDL

Development of the TMDL

The TMDL Objective
The TMDL Process
Selection of Approach
The Phased Approach
Approval of TMDLs by EPA

Implementation of the TMDL

NPDES Process for Point Sources
State or Local Process for Nonpoint Sources

Assessment of the TMDL

CHAPTER 4 -- EPA AND STATE RESPONSIBILITIES

EPA/State Agreements

State Responsibilities

Identification of Water Quality-Limited Waters Still Requiring TMDLs
Identification and Scheduling of Targeted Waterbodies
TMDL Development
Continuing Planning Process
Water Quality Management Plan
Public Notice and Participation
Reporting
Other Specific Responsibilities

EPA Responsibilities

Review of 303(d) lists
TMDL Review and Approval
Program Audits
Technical Assistance and Training
Guidance Documents and Reports
EPA Headquarters Responsibilities
EPA Regional Responsibilities

APPENDIX A -- RELATIONSHIP TO OTHER GUIDANCE

Monitoring Guidance
Cooperative Monitoring/Citizen Volunteer Monitoring Guidance
Wasteload Allocation Technical Guidance
Technical Support Document for Water Quality-Based Toxics Control
Permit Writers Guidance
Nonpoint Source Guidance

APPENDIX B -- SUPPORTING PROGRAMS

EPA Water Quality Criteria and Standards
Section 305(b) -- Water Quality Assessment
Section 304(l) -- Impaired Waters
Section 319 -- Nonpoint Source Program
Section 314 -- Clean Lakes Program
Section 320 -- National Estuary Program
Monitoring Program
Effluent Limitation Guidelines and Standards
NPDES Permits and Individual Control Strategies
Marine and Estuarine Waters
Groundwater
CERCLA
SARA

APPENDIX C -- SCREENING CATEGORIES

APPENDIX D -- SELECTED TECHNICAL CONSIDERATIONS

Design Conditions
Mathematical Models
Pollutant Allocation Schemes
Multiple Discharges
Allocation Tradeoffs
Persistent and/or Highly Bioaccumulative Toxic Pollutants
Use of Two-Number Criteria
Sediment Issues

APPENDIX E -- MATHEMATICAL MODEL SUPPORT

APPENDIX F -- GENERAL EPA/STATE AGREEMENT OUTLINE FOR DEVELOPMENT OF TMDLs

APPENDIX G -- CAUSES AND SOURCES OF POLLUTION

LIST OF ACRONYMS

 

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