| Antidegradation |
Tier 2 Antidegradation Reviews and Significance Thresholds, Memorandum from Ephraim King (PDF) (4 pp, 169K) |
2005/08/10 |
|
| Antidegradation |
Interpretation of Federal Antidegradation Regulatory Requirement, Memorandum from Tudor Davies (PDF) (449K) |
1994/02/22 |
|
| Antidegradation |
Antidegradation Policy, Memorandum from William Diamond (PDF) (55K) |
1991/06/13 |
|
| Antidegradation |
Application of Antidegradation Policy to the Niagara River, Memorandum from Margaret Prothro (PDF) (144K) |
1989/08/04 |
|
| Antidegradation |
EPA Designation of Outstanding National Resource Waters, Memorandum from William Diamond (PDF) (409K) |
1989/05/25 |
|
| Antidegradation |
Antidegradation Policy, Memorandum from Margaret Prothro (PDF) (293K) |
1985/12/10 |
|
| Antidegradation |
Antidegradation Policy, Memorandum from Patrick Tobin (PDF) (80K) |
1985/11/22 |
|
| Antidegradation |
Questions and Answers on Antidegradation (PDF) (1MB) |
1968/08/01 |
|
| Antidegradation |
Compendium of Department of the Interior Statements on Non-Degradation of Interstate Waters (PDF) (58 pp, 3.4MB) |
1968/08/01 |
|
| Antidegradation |
Antidegradation, Wasteloads, and Permits, Memorandum from Edwin Johnson (PDF) (77K) |
1988/01/01 |
|
| Arsenic |
Arsenic Decision, Memorandum from Robert Perciasepe (PDF) (3 pp, 334K) |
1995/02/06 |
|
| Assessment |
Thesaurus of Terms Used in Microbiological Risk Assessment |
2007/07/01 |
|
| Assessment |
Consolidated Assessment and Listing Methodology: Toward a Compendium of Best Practices |
2002/07/01 |
|
| Assessment |
Biological Methods Manual (Biological Field and Laboratory Methods for Measuring the Quality of Surface Waters and Effluents) (PDF) (194 pp, 8.3MB) |
1973/07/01 |
670-4-73-001 |
| Assessment, Biological |
A Primer on Using Biological Assessments to Support Water Quality Management (PDF) (108 pp, 6.1MB) |
2011/10/01 |
810-R-11-01 |
| Assessment, chronic toxicity |
Short-Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms |
2002/10/01 |
821-R-02-013 |
| Assessment, chronic toxicity |
Short-Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Marine and Estuarine Organisms |
2002/10/01 |
821-R-02-014 |
| Assessment, toxicity |
Methods for Measuring Acute Toxicity of Effluents to Freshwater and Marine Organism |
2002/10/01 |
821-R-02-012 |
| Bacteria criteria |
Ambient Water Quality Criteria for Bacteria (PDF) (662K) |
1986/01/01 |
440/5-84-002 |
| Biological criteria |
Biological Assessments: Key Terms and Concepts (PDF) (2 pp, 1.6MB) |
2011/03/01 |
820-F-11/006 |
| Biological criteria |
Summary of Biological Assessment Programs and Biocriteria Development for States, Tribes, Territories, and Interstate Commissions: Streams and Wadeable Rivers |
2002/12/01 |
822-R-02-048 |
| Biological criteria |
Using Biological Data as Indicators of Water Quality (PDF) (38 pp, 237K) |
2002/07/01 |
|
| Biological criteria |
Stressor Identification Guidance Document |
2000/12/01 |
822-B-00-005 |
| Biological criteria |
Summary of State Biological Assessment Programs for Streams and Rivers (PDF) (168 pp, 6.7MB) |
1996/02/01 |
230-R-96-007 |
| Biological criteria |
Policy on Biological Assessments and Criteria (PDF) (19 pp, 2.3MB) |
1991/06/19 |
|
| Biological criteria |
Application of Clean Water Act Section 401 State Water Quality Certification to Federal Energy Regulatory Commission (FERC) Licenses, Letter to the Honorable Lois Cashell, Secretary, Federal Energy Regulatory Commission (PDF) (4 pp, 443K) |
1991/01/18 |
|
| Biological criteria |
Biological Criteria: National Program Guidance for Surface Waters (PDF) (60 pp, 4.4MB) |
1990/04/01 |
440/5-90-004 |
| Biological criteria |
Biological Assessments and Criteria: Crucial Components of Water Quality Programs (PDF) (6 pp, 1.1MB) |
2002/01/01 |
822-F-02-006 |
| Biological criteria |
Lake and Reservoir Bioassessment and Biocriteria: Technical Guidance Document |
1998/01/01 |
841-B-98-007 |
| Chesapeake Bay |
Response to Petition from Chesapeake Bay Foundation |
2005/06/13 |
|
| Conditional Approvals |
Guidance for the Use of Conditional Approvals for State Water Quality Standards, Memorandum from Margaret Prothro (PDF) (4 pp, 639K) |
1989/06/20 |
|
| Copper criteria |
Streamlined Water-Effect Ratio Procedure for Discharges of Copper (PDF) (41 pp, 117K) |
2001/03/01 |
822-R-01-005 |
| Criteria |
Using Single Sample Maximum Values in State Water Quality Standards, Fact Sheet |
2006/08/01 |
823-F-06-013 |
| Criteria |
Guidance Document on Expression of Aquatic Life Criteria as Dissolved Criteria (PDF) (30 pp, 1.4MB) |
1993/10/01 |
|
| Criteria |
Guidance on the Use of Criteria Contained in "Quality Criteria For Water" During the Review of State Water Quality Standards Revisions (PDF) (124K) |
1978/01/16 |
|
| Criteria |
National Recommended Water Quality Criteria |
Current |
|
| Criteria |
List of EPA Water Quality Criteria Documents (PDF) (5 pp, 224K) |
1994/01/01 |
|
| Criteria |
Guidelines for Deriving Numerical National Water Quality Criteria for the Protection of Aquatic Organisms and Their Uses (PDF) (59 pp, 556K) |
1985/01/01 |
PB85-227049 |
| Designated Uses |
Designating Attainable Uses Symposium, 2002 |
2002/06/03 |
|
| Designated Uses-Recreation |
Designation of Recreation Uses (PDF) (6 pp, 503K) |
1989/09/07 |
|
| Dissolved oxygen criteria |
Aquatic Life Criteria for Dissolved Oxygen (Saltwater) Cape Cod to Cape Hatteras |
2000/11/01 |
822-R-00-012 |
| Downstream |
Response to Sierra Club Petition |
2004/06/25 |
|
| Downstream |
Favorable Supreme Court Decision Concerning Interstate Water Pollution, Memorandum from Raymond Ludwiszewski (Arkansas v. Oklahoma) (PDF) (29 pp, 2MB) |
1992/02/27 |
|
| Economic |
Interim Economic Guidance for Water Quality Standards: Workbook |
1995/03/01 |
823/B-95-002 |
| Emerging contaminants |
Aquatic Life: Contaminants of Emerging Concern White Paper |
2008/06/03 |
|
| Endangered Species Act Consultation |
Memorandum of Agreement Between the Environmental Protection Agency, Fish and Wildlife Service, and National Marine Fisheries Service Regarding Enhanced Coordination Under the Clean Water Act and the Endangered Species Act; Notice |
2001/02/22 |
823-F-01-002 |
| Endangered Species Act Consultation |
Endangered Species Consultation Handbook (PDF) (315 pp, 919K) |
1998/03/01 |
|
| Endangered Species Act Consultation |
Endangered Species Act Joint Guidance (PDF) (13 pp, 886K) |
1992/07/27 |
|
| Existing Uses |
Questions and Answers on EPA's Existing Use Policy, Letter to Mr. Derek Smithee, State of Oklahoma Water Resources Board (PDF) (12 pp, 3.8MB) |
2008/09/05 |
|
| Existing Uses |
Determination of "Existing Uses" for Purposes of Water Quality Standards Implementation, Memorandum from Patrick Tobin (PDF) (157K) |
1986/04/07 |
|
| Existing Uses |
Interpretation of the Term "Existing Uses" Under the Antidegradation Policy (PDF) (54K) |
1985/02/21 |
|
| Fish and Shellfish Advisories |
Guidance: Use of Fish and Shellfish Advisories and Classifications in 303(d) and 305(b) Listing Decisions, Letter from Geoffrey Grubbs and Robert Wayland (PDF) (68K) |
2000/10/24 |
|
| Fish consumption |
Estimated per capita fish consumption in the United States (PDF) (262 pp, 3.2MB) |
2002/08/01 |
821-C-02-003 |
| Fish consumption |
National Guidance for Assessing Chemical Contaminant Data for Use in Fish Advisories |
1996-2002 |
823-B-00-007, 823-B-00-008, 823-B-00-009, 823R95001 |
| Great Lakes |
Acceptable Risk Levels in Great Lakes Waters, Fact Sheet |
2006/08/01 |
823-F-06-012 |
| Great Lakes |
Water Quality Guidance for the Great Lakes System: Supplementary Information Document (SID) (PDF) (774 pp, 1.2MB) |
1995/03/01 |
820-B-95-001 |
| Groundwater |
Water Quality Standards and Underground Waters, Memorandum from Joan Bernstein (PDF) (4 pp, 424K) |
1979/05/29 |
|
| Human health criteria |
Methodology for Deriving Ambient Water Quality Criteria for the Protection of Human Health |
2000/10/01 |
822-B-00-004 |
| Implementation Plans |
Revision of Water Quality Standards and Implementation Plans Under [Section] 303 of the Federal Water Pollution Control Act, Memorandum from William Frick (PDF) (8 pp, 498K) |
1975/02/03 |
|
| Interstate Waters |
National Stream Use Policy, Memorandum to Acting Director, Water Planning Division (PDF) (18K) |
1972/10/15 |
|
| Marinas |
Section 401 Certification of Marinas, Memorandum from Catherine Winer (PDF) (5 pp, 505K) |
1985/11/12 |
|
| Marine pH criteria |
Marine pH Criteria, Letter to Center for Biological Diversity (PDF) (4 pp, 246K) |
2010/04/15 |
|
| Metals criteria |
Modifications to "Interim Guidance on Determination and Use of Water-Effect ratios for Metals" and EPA’s "Recalculation Procedure when Deriving Site-Specific Criteria" (PDF) (21 pp, 187K) |
1997/12/03 |
|
| Metals criteria |
Interim Guidance on Determination and Use of Water-Effect ratios for Metals, Memorandum from Tudor Davies (PDF) (134 pp, 8.2MB) |
1994/02/22 |
823/B-94-001 |
| Metals criteria |
Office of Water Policy and Technical Guidance on Interpretation and Implementation of Aquatic Life Metals Criteria (PDF) (49 pp, 2.5MB) |
1993/10/01 |
822/F-93-009 |
| Mixing Zones |
Initial Zones of Dilution for Bacteria in Rivers and Streams, Memorandum from Ephraim King (PDF) (3 pp, 655K) |
2008/11/12 |
|
| Mixing Zones |
Compilation of EPA Mixing Zone Documents |
2006/07/01 |
823-R-06-003 |
| Mixing Zones |
EPA Guidance on Application of State Mixing Zone Policies in EPA-issued NPDES Permits, Memorandum from Robert Perciasepe (PDF) (471K) |
1996/08/06 |
|
| Mixing Zones |
Mixing Zones for Water Quality Standards, Memorandum from Richard Stoll (PDF) (2 pp, 265K) |
1979/05/01 |
|
| Mixing Zones |
Decision no. 31 of the General Counsel on Matters of Law Pursuant to 40 CFR Section 125.36(m) (PDF) (5 pp, 167K) |
1975/10/14 |
|
| Mixing Zones |
Mixing Zones, Memorandum from Robert Zenner (PDF) (3 pp, 345K) |
1973/10/02 |
|
| Modeling |
Guidance Document on Dynamic Modeling and Translators (PDF) (30 pp, 1.4MB) see page 18 |
1993/08/01 |
|
| Monitoring |
Guidance Document on Monitoring (PDF) (30 pp, 1.4MB) see page 29 |
1993/10/01 |
|
| Monitoring |
State Water Monitoring and Waste Load Allocation (PDF) (52 pp, 3.3MB) |
1985/10/01 |
440/4-85-031 |
| Narrative translator criteria |
Option 3 of Section 303(c)(2)(B) Guidance, Memorandum from David Sabock (PDF) (2 pp, 275K) |
1990/01/03 |
|
| Nonpoint Sources |
Nonpoint Source Guidance |
1996/05/01 |
|
| Nonpoint Sources |
Guidance Specifying Management Measures for Sources of Nonpoint Pollution in Coastal Waters |
1993/01/01 |
840-B-92-002 |
| Nonpoint sources |
Nonpoint Source Controls and Water Quality Standards, Memorandum from Carl Myers (PDF) (9 pp, 835K) |
1987/08/19 |
FY-87-49 |
| Nonpoint Sources |
Answers to Questions on Nonpoint Sources and WQS, Memorandum from Lawrence Jensen (PDF) (69K) |
1986/03/07 |
|
| Nonpoint Sources |
Coastal Nonpoint Pollution Control Program: Program Development and Approval Guidance (PDF) (68 pp, 654K) |
1993/01/01 |
841B93003 |
| Nutrients |
Bioconfirmation, Letter to Maine Department of Environmental Protection (PDF) (4 pp, 754K) |
2011/12/22 |
|
| Nutrients |
Response letter to the Mississippi River Petition, July 29, 2011 (PDF) (7 pp, 1.6MB) |
2011/07/29 |
|
| Nutrients |
Technical Assistance for Developing Nutrient Site-Specific Alternative Criteria in Florida, Interim Draft (PDF) (45 pp, 883K) |
2011/06/01 |
|
| Nutrients |
Working in Partnership with States to Address Phosphorus and Nitrogen Pollution through Use of a Framework for State Nutrient Reductions, Memorandum from Nancy Stoner, (a.k.a. Framework Memo) (PDF) (6 pp, 401K) |
2011/03/16 |
|
| Nutrients |
Letter to New England Interstate Water Pollution Control Commission, March 1, 2011 (PDF) (4 pp, 815K) |
2011/03/01 |
|
| Nutrients |
EPA Response to the Maine Congressional Delegation’s January 21, 2011 Letter (PDF) (9 pp, 854K) |
2011/02/15 |
|
| Nutrients |
Using Stressor-response Relationships to Derive Numeric Nutrient Criteria Technical Guidance (PDF) (93 pp, 1.9MB) |
2010/11/01 |
820-S-10-001 |
| Nutrients |
An Urgent Call to Action: Report of the State-EPA Nutrient Innovations Task Group (PDF) (170 pp, 5.6MB) |
2009/08/27 |
|
| Nutrients |
EPA Needs to Accelerate Adoption of Numeric Nutrient Water Quality Standards, OIG Report 09-P-0223 (PDF) (23 pp, 319K) |
2009/08/26 |
09-P-0223 |
| Nutrients |
State Adoption of Numeric Nutrient Standards 1998–2008 Status Report |
2008/12/01 |
821-F-08-007 |
| Nutrients |
Nutrient Criteria Technical Guidance: Wetlands |
2008/06/01 |
822-B-08-001 |
| Nutrients |
Nutrient Pollution and Numeric Water Quality Standards, Memorandum from Ben Grumbles |
2007/05/25 |
|
| Nutrients |
Establishing numeric nutrient criteria, Letter from Ben Grumbles to the Natural Resources Defense Council (PDF) (5 pp, 1MB) |
2004/03/04 |
|
| Nutrients |
Development and Adoption of Nutrient Criteria into Water Quality Standards, Memorandum from Geoffrey Grubbs (PDF) (21 pp, 246K) |
2001/11/14 |
|
| Nutrients |
Nutrient Criteria Technical Guidance Manual: Estuarine and Coastal Marine Waters |
2001/10/01 |
822-B-01-003 |
| Nutrients |
Nutrient Criteria Technical Guidance: Rivers and Streams |
2000/07/07 |
822-B-00-002 |
| Nutrients |
Nutrient Criteria Technical Guidance: Lakes and Reservoirs |
2000/07/07 |
822-B-00-001 |
| Nutrients |
National Strategy for the Development of Regional Nutrient Criteria (PDF) (53 pp, 271K) |
1998/06/01 |
822-R-98-002 |
| Ocean Acidification |
Integrated Reporting and Listing Decisions Related to Ocean Acidification, Memorandum from Denise Keehner |
2010/11/15 |
|
| Recreational Criteria |
Recreational Water Quality Criteria (draft) (PDF) (73 pp, 543K) |
2011/12/09 |
820-D-11-002 |
| Recreational Criteria |
Summary of Stakeholder Meeting on EPA’s Development of New or Revised Recreational Water Quality Criteria June 14–15, 2011 – New Orleans, Louisiana (PDF) (7 pp, 133K) |
2011/06/14 |
|
| Recreational Criteria |
Recreational Water Criteria – Critical Path Science Plan |
2007/08/31 |
823-R-08-002 |
| Recreational Criteria |
Bacteria Rule for Coastal and Great Lakes Recreation Waters (BEACH Act rule) |
2004/11/16 |
|
| Recreational Criteria |
Beaches Environmental Assessment and Coastal Health Act of 2000 |
2000/01/24 |
PUBLIC LAW 106–284 |
| Reporting |
Watershed Monitoring and Reporting Requirements for Section 319 National Monitoring Program Projects |
1991/08/30 |
843B91113 |
| Reporting |
Integrated Reporting (IR) Guidelines under Sections 303(d), 305(b), and 314 of the Clean Water Act |
|
|
| Seaward Extent of State WQS |
Seaward Extent of State Water Quality Standards, Memorandum from Cathy Winer (PDF) (4 pp, 185K) |
1985/10/31 |
|
| Sediment |
Contaminated Sediment Management Strategy (PDF) (131 pp, 679K) |
1998/04/01 |
823-R-98-001 |
| Sediment criteria |
Suspended and Bedded Sediments, Technical Guidance |
2003/08/20 |
|
| Site-specific criteria |
Establishing Site Specific Aquatic Life Criteria Equal to Natural Background (Tudor Davies Memo) (PDF) (3 pp, 125K) |
1997/11/05 |
|
| Site-specific criteria |
Guidelines for Deriving Numerical Aquatic Site-Specific Water Quality Criteria by Modifying National Criteria |
1984/12/01 |
600/S3-84-099 |
| Standards, General |
Strategy for Water Quality Standards and Criteria |
2003/08/03 |
823-R-03-010 |
| Standards, General |
Assessment of the Water Quality Standards Development and Review Process (PDF) (83 pp, 508K) |
2000/10/01 |
|
| Standards, General |
Advanced Notice of Proposed Rulemaking for Water Quality Standards (PDF) (65 pp, 593K) |
1998/07/07 |
Federal Register Vol. 63, No.129 Pages 36741-36806 |
| Standards, General |
Water Quality Criteria and Standards Plan: Priorities for the Future (PDF) (60 pp, 121K) |
1998/06/01 |
822-R-98-003 |
| Standards, General |
Water Quality Criteria and Standards for the 21st Century: Proceedings, 4th National Conference, September 13-15, 1994 (PDF) (252 pp, 82.3MB) |
1994/09/01 |
820/R-95-001 |
| Standards, General |
Water Quality Standards for the 21st Century: Proceedings of the Third National Conference, August 31-September 3, 1992, Las Vegas, Nevada (PDF), December, 1992 (16.4MB) |
1992/12/01 |
823/R-92-009 |
| Standards, General |
Water Quality Standards, Memorandum from Jack Raven (PDF) (2 pp, 105K) |
1984/02/02 |
|
| TMDL |
Guidance for Water Quality-based Decisions: The TMDL Process |
1991/04/01 |
440/4-91-001 |
| Toxic criteria |
Technical Support Document of Water Quality-Based Toxics Control (PDF) (335 pp, 26.6MB) |
1991/03/01 |
823/R-88-100 |
| Toxic criteria |
Memorandum from LaJuana Wilcher Announcing Development of Federal Rulemaking to Promulgate State Water Quality Standards (National Toxics Rule) (PDF) (5 pp, 426K) |
1990/01/26 |
|
| Toxic criteria |
Compliance with CWA Section 303(c)(2)(B), Memorandum from Martha Prothro (PDF) (3 pp, 334K) |
1989/06/19 |
|
| Toxic criteria |
Guidance for State Implementation of Water Quality Standards for CWA Section 303(c)(2)(B), Memorandum from Rebecca Hanmer (PDF) (22 pp, 1.4MB) |
1988/12/12 |
823-R-88-100 |
| Toxic criteria |
Selection of Water Quality Criteria in State Water Quality Standards, Memorandum from Edwin Johnson (PDF) (4 pp, 592K) |
1985/02/28 |
|
| Toxic criteria |
Recalculation of State Toxic Criteria from October 1, 1982 (PDF) (83 pp, 3.4MB) |
1982/10/01 |
|
| Toxic criteria |
Toxic Criteria Recommendations, Memorandum from Joseph Krivak re. November 28, 1980 (PDF) (2 pp, 83K) |
1981/08/28 |
|
| Tribes |
Strategy for Reviewing Tribal Eligibility Applications to Administer EPA Regulatory Programs (Strategy for Treatment in a Similar Manner to a State) (PDF) (38 pp, 534K) |
2008/01/23 |
|
| Tribes |
Final Section 106 Tribal Grant Guidance |
2006/10/20 |
832-R-06-003 |
| Tribes |
OST Expectations for Water Quality Standards for Indian Reservations for Tribes Treated as States, Memorandum from Tudor Davies (PDF) (5 pp, 246K) |
1992/04/20 |
|
| Tribes |
Guidance on Water Quality Standards and 401 Certification Programs Administered by Indian Tribes, Memorandum from Tudor Davies (PDF) (7 pp, 562K) |
1991/12/31 |
|
| Tribes |
Final WQS Regulation Amendment Concerning Indian Tribes, Memorandum from Tudor Davies (PDF) (5 pp, 294K) |
1991/12/05 |
|
| Tribes |
Reference Guide to Water Quality Standards for Indian Tribes (PDF) (3MB) |
1990/01/02 |
440/5-90-002 |
| Tribes |
Water Quality Standards Cooperative Agreements, Memorandum from David Sabock (PDF) (5 pp, 642K) |
1989/08/22 |
|
| Tribes |
Questions on Application of Federal Environmental Programs on Indian Lands, Letter to Mr. Dave Frohnmayer, Attorney General (PDF) (7 pp, 580K) |
1988/09/09 |
|
| Triennial Review |
Guidance: Coordinating CSO Long-Term Planning with Water Quality Standards Reviews (PDF) (79 pp, 498K) |
2001/07/31 |
833-R-01-002 |
| Triennial Review |
Three-Year Quality Standards Review, Memorandum from Patrick Tobin (PDF) (2 pp, 251K) |
1983/09/06 |
|
| Use Attainability Analysis |
Improving the Effectiveness of the Use Attainability Analysis Process, Memorandum from Ephraim King |
2006/03/13 |
|
| Use Attainability Analysis |
UAAs and Other Tools for Managing Designated Uses (PDF) (403 pp, 9.3MB) |
2006/03/01 |
821-R-07-001 |
| Use Attainability Analysis |
Water Quality Standards: Examples of Alternatives to Changing Long-term Designated Uses to Achieve Water Quality Goals (PDF) (14 pp, 830K) |
2005/03/01 |
|
| Use Attainability Analysis |
State Water Quality Standards Approvals Use Attainability Analysis Submittals, Memorandum from Patrick W. Tobin (PDF) (3 pp, 231K) |
1984/11/28 |
|
| Use Attainability Analysis |
Technical Support Manual: Waterbody Surveys and Assessments for Conducting Use Attainability Analysis, Volumes 1-3 (PDF) (1983-84; 622 pp, 19.6MB) |
1984/01/01 |
440/4-86-037
440/4-86-038
440/4-86-039 |
| Use Attainment |
Framework for Incorporating Community Preferences in Use Attainment and Related Water Quality Decision-Making |
2011/02/01 |
625/R-08/001F |
| Variances |
Request for Views on Allowable Duration of Water Quality Standards Variances, Memorandum from Catherine Winer (PDF) (4 pp, 242K) |
1992/01/24 |
|
| Variances |
National Assessment of State Variance Procedures: Report (PDF) (44 pp, 3MB) |
1990/11/01 |
|
| Variances |
Variances in Water Quality Standards, Memorandum from Edwin Johnson (PDF) (9K) |
1985/03/15 |
|
| Variances |
Applicability of the Part 25 "Public Participation" Regulations to the Approval of Variances from Water Quality Standards, Memorandum from Michele Corash (PDF) (5 pp, 248K) |
1980/09/04 |
|
| Variances |
Decision no. 58 of the General Counsel on Matters of Law Pursuant to 40 CFR Section 125.36(m) (PDF) (541K) |
1977/03/29 |
|
| Variances |
Decision no. 44 of the General Counsel on Matters of Law Pursuant to 40 CFR Section 125.35(m) (PDF) (341K) |
1976/06/22 |
|
| Variances and Downgrades |
Definitions of WQS Terms, Memorandum from Kenneth Mackenthun (PDF) (75K) |
1979/07/03 |
|
| Waste Load Allocations |
Technical Guidance Manual for Performing Wasteload Allocations, Book 6, Design Conditions |
1986/09/01 |
440487004 |
| Water Quality-Based Approach |
Committing EPA's Water Program to Advancing the Watershed Approach, Memorandum from Tracy Mehan |
2002/12/03 |
|
| Water Quality |
State Authority to Allocate Water Quantities - Section 101(g) of the Clean Water Act (PDF) (4 pp, 387K) |
1978/11/07 |
|
| Waters of the US |
Clean Water Act Definition of “Waters of the United States” |
Current |
|
| Wetlands |
Numeric Water Quality Criteria for Wetlands (PDF) (51 pp, 2.8MB) |
1991/07/08 |
|
| Wetlands |
Water Quality Standards for Wetlands: National Guidance |
1990/07/01 |
440/S-90-011 |
| Wetlands |
Wetlands and 401 Certification: Opportunities for States and Eligible Indian Tribes (PDF) (73 pp, 4.6MB) |
1989/04/01 |
|
| Wetlands |
Clean Water Act Authority Over Wetlands, Memorandum from Cathy Winer (PDF) (2 pp, 277K) |
1985/04/19 |
|
Science & Technology