Laws & Regulations
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National Clarifying Guidance for 1998 State and Territory Clean Water Act Section 303(d) Listing Decisions
The guidance clarifies several key policies related to listing of waters under section 303(d) for the 1998 listing cycle.
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Treatment of Indian Tribes in a Similar Manner as States for Purposes of Section 303(d) of the Clean Water Act
Prepublished version of the Treatment of Indian Tribes in a Similar Manner as States for Purposes of Section 303(d) of the Clean Water Act
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Meeting Summary of Nutrient TMDL Workshop, February 2011, New Orleans, LA
The purpose of this meeting was to bring together U.S. EPA and state staff in the section 303(d) program to discuss and exchange ideas related to nutrients.
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Approval of Washington 2012 303d List
EPA's letter to Washington Department of Ecology approving Washington's 2012 303(d) list of impaired waters.
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Partial Approval and Partial Disapproval of Washington 2014-2018 303d List
EPA's partial approval and partial disapproval of Washington's 2014-2018 303(d) list.
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Statute and Regulations addressing Impaired Waters and TMDLs
An overview of statutes and regulations pertaining to impaired waters and TMDLs.
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TMDLs at Work: Carrier Creek
The documents detail the Carrier Creek TMDL at work.
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New York Impaired Waters List Documents
The documents detail the New York 2014 impaired waters list.
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Guidelines for Reviewing TMDLs Under Existing Regulations Issued in 1992
The document details guidelines for reviewing TMDLs under existing regulations issued in 1992.
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Draft Considerations for the Development of Multijurisdictional TMDLs
The memorandum is intended to provide recommendations for TMDL practitioners to consider concerning development of multijurisdictional TMDLs.
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EPA Issues November 15, 2010 Memorandum: Integrated Reporting and Listing Decisions Related to Ocean Acidification
The memorandum provides information to assist regions and states in preparing and reviewing Integrated Reports related to ocean acidification (OA) impacts under Sections 303(d), 305(b) and 314 of the Clean Water Act (CWA).
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TMDLs at Work: Long Island Sound
The documents detail the Long Island Sound TMDL at work.
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Nutrient TMDL Workshop
Agenda from the February 2011 nutrient TMDL workshop.
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New Policies for Establishing and Implementing TMDLs
The memorandum details new policies for establishing and implementing TMDLs.
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Guidance for 1994 CWA Section 303(d) Lists
The memo discusses minimum requirements for the April 1994 State lists of waterbodies requiring TMDLs under section 303(d) of the Clean Water Act (CWA).
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National Corn Growers Association Clean Water Act and TMDL Program: An Introduction and Basic Desk Reference for Corn Growers
The primer from the National Corn Growers Association includes information on the Clean Water Act, TMDLs, a hypothetical TMDL case study and opportunities for the agricultural community's involvement in development and implementation of TMDLs.
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Incorporating Green Infrastructure into TMDLs
The fact sheet provides examples of how some states describe green infrastructure and low impact development activities in their TMDL implementation sections to address stormwater-source impaired waters.
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TMDLs at Work: Peconic Estuary
The documents detail the Peconic Estuary TMDL at work.
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Effectively Implementing TMDLs
An overview of effectively implementing TMDLs
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Supplemental Information for Reviewing Reasonable Assurance in TMDLs
This is a memo addressing state development and EPA review of reasonable assurance in TMDLs, distributed in February of 2012. This is currently considered active OWOW guidance (July 2020).