Laws & Regulations
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Nutrient TMDL Workshop
Agenda from the February 2011 nutrient TMDL workshop.
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Establishing TMDL "Daily" Loads in Light of the Decision by the U.S. Court of Appeals for the D.C. Circuit
The memorandum clarifies EPA's expectations concerning the appropriate time increment used to express TMDLs following the decision of Friends of the Earth, Inc. v. EPA, et al.
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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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Clarification of the Use of Biological Data and Information in the 2002 Integrated Water Quality Monitoring and Assessment Report Guidance
The memorandum modifies the 2002 Integrated Water Quality Monitoring and Assessment Report Guidance to provide clarity and promote consistency in the manner in which states use biological data and information in developing their 2002 submissions.
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TMDLs at Work: Long Island Sound
The documents detail the Long Island Sound TMDL at work.
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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).
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Water Quality Restoration and Protection in the U.S.
Water quality restoration and protection in the United States is based on assessing waters and taking actions to restore or protect them.
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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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Effectively Implementing TMDLs
An overview of effectively implementing TMDLs
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The Florida Impaired Waters Rule
The Florida Impaired Waters Rule establishes a methodology to identify waters that will be included on the State's Clean Water Act Section 303(d) list of impaired waters.
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TMDLs at Work: Eagleville Brook Watershed
The documents detail the Eagleville Brook Watershed TMDL at work.
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Clarification Regarding "Phased" Total Maximum Daily Loads
The memorandum clarifies the "Guidance for Water Quality-Based Decisions: The TMDL Process", by explaining EPA's interpretation of the term "phased TMDL" as used in EPA guidance.
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PCB TMDL Handbook
The documents provides regions, states and other stakeholders with a compendium of information for use in developing TMDLs for waterbodies impaired by polychlorinated biphenyls (PCBs).
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TMDL Effectiveness Monitoring Data and Plans
A series of guides for TMDL effectiveness monitoring data and plans.
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Deschutes River TMDLs
EPA's Total Maximum Daily Loads (TMDLs) for the Deschutes River watershed in Washington.
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Asbestos National Emission Standards for Hazardous Air Pollutants (NESHAP) Legacy Docket Indexes
This page contains six legacy docket indexes which contain the document number and description of Environmental Protection Agency (EPA) studies and contractor reports relating to the Asbestos NESHAP.
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National Emission Standards for Hazardous Air Pollutants (NESHAP) for Source Categories: Perchloroethylene Dry Cleaning Facilities - 1993 Final Rule (58 FR 49354)
This document is a copy of the Federal Register publication of the September 22, 1993 Final Rule for the National Emission Standards for Hazardous Air Pollutants for Source Categories: Perchloroethylene Dry Cleaning Facilities.
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Amendments to the General Provisions of Part 62 for Incorporation by Reference of Clean Air Act 111(d) and 129 State Plans
EPA issued a direct final rule and a parallel proposed rule to amend the general provisions of 40 CFR part 62 (subparts 62.02, 62.10, and 62.12).
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Clay Ceramics Manufacturing NESHAP - Proposed Amendments
In this action, EPA is proposing revisions to the Clay Ceramics Manufacturing NESHAP based on information provided by industry stakeholders in a petition for reconsideration filed on December 23, 2015, and other information collected by EPA.
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Amendments to the General Provisions of Part 62 Incorporation by Reference of Clean Air Act 111(d) and 129 State Plans
Amendments to the General Provisions of Part 62 Incorporation by Reference of Clean Air Act 111(d) and 129 State Plans