Antidegradation |
[See Tier 2 Antidegradation Reviews and Significance Thresholds Memo ] |
2005/08/10 |
|
Antidegradation |
[See Antidegradation Policy Approvals and Endangered Species Act Consultations, Memorandum from Geoffrey Grubbs ] |
2005/01/27 |
|
Antidegradation |
[See Interpretation of Federal Antidegradation Regulatory Requirement, Memorandum from Tudor Davies ] |
1994/02/22 |
|
Antidegradation |
[See Antidegradation Policy, Memorandum from William Diamond ] |
1991/06/13 |
|
Antidegradation |
[See Application of Antidegradation Policy to the Niagara River, Memorandum from Margaret Prothro ] |
1989/08/04 |
|
Antidegradation |
[See EPA Designation of Outstanding National Resource Waters, Memorandum from William Diamond ] |
1989/05/25 |
|
Antidegradation |
[See Antidegradation Policy, Memorandum from Margaret Prothro ] |
1985/12/10 |
|
Antidegradation |
[See Antidegradation Policy, Memorandum from Patrick Tobin ] |
1985/11/22 |
|
Antidegradation |
Questions and Answers on Antidegradation (PDF) (16 pp, 1 MB) |
1985/08 |
|
Antidegradation |
[See Compendium of Department of the Interior Statements on Non-Degradation of Interstate Waters ] |
1968/08/01 |
|
Antidegradation |
[See Antidegradation, Wasteloads, and Permits, Memorandum from Edwin Johnson ] |
1988/01/01 |
|
Antidegradation |
[See Downgrading of Water Quality Standards ] |
1978/05/23 |
|
Arsenic |
[See Arsenic Decision, Memorandum from Robert Perciasepe ] |
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 |
[See Biological Methods Manual (Biological Field and Laboratory Methods for Measuring the Quality of Surface Waters and Effluents) ] |
1973/07/01 |
670-4-73-001 |
Assessment, Biological |
A Primer on Using Biological Assessments to Support Water Quality Management (PDF)(108 pp, 6 MB) |
2011/10 |
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 |
1986/01/01 |
440/5-84-002 |
Biological criteria |
[See Biological Assessments: Key Terms and Concepts ] |
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 (PDF)(418 pp, 28 MB) |
2002/12/01 |
822-R-02-048 |
Biological criteria |
Using Biological Data as Indicators of Water Quality |
2002/07/01 |
|
Biological criteria |
Stressor Identification Guidance Document (PDF)(228 pp, 13 MB) |
2000/12/01 |
822-B-00-005 |
Biological criteria |
[See Summary of State Biological Assessment Programs for Streams and Rivers ] |
1996/02/01 |
230-R-96-007 |
Biological criteria |
[See Final Policy Memo on Biological Assessments and Criteria ] |
1991/06/19 |
|
Biological criteria |
[See 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 ] |
1991/01/18 |
|
Biological criteria |
Biological Criteria: National Program Guidance for Surface Waters (PDF)(68 pp, 4 MB) |
1990/04/01 |
440/5-90-004 |
Biological criteria |
Biological Assessments and Criteria: Crucial Components of Water Quality Programs (PDF)(6 pp, 5 MB) |
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 |
Biological criteria |
Procedures for Initiating Narrative Biological Criteria (PDF)(16 pp, 899 K) |
1992/10 |
822-B-92-002 |
Chesapeake Bay |
Response to Petition from Chesapeake Bay Foundation |
2005/06/13 |
|
Conditional Approvals |
[See Guidance for the Use of Conditional Approvals for State Water Quality Standards, Memorandum from Margaret Prothro ] |
1989/06/20 |
|
Copper criteria |
Streamlined Water-Effect Ratio Procedure for Discharges of Copper |
2001/03/01 |
822-R-01-005 |
Criteria |
Guidance Document on Expression of Aquatic Life Criteria as Dissolved Criteria (PDF) (49 pp, 1 MB) |
1993/10/01 |
|
Criteria |
[See Guidance on the Use of Criteria Contained in "Quality Criteria For Water" During the Review of State Water Quality Standards Revisions ] |
1978/01/16 |
|
Criteria |
National Recommended Water Quality Criteria |
Current |
|
Criteria |
List of EPA Water Quality Criteria Documents |
1994/01/01 |
|
Criteria |
Guidelines for Deriving Numerical National Water Quality Criteria for the Protection of Aquatic Organisms and Their Uses |
1985/01/01 |
PB85-227049 |
Designated Uses |
[See Designating Attainable Uses Symposium, 2002 ] |
2002/06/03 |
|
Designated Uses-Recreation |
[See Designation of Recreation Uses ] |
1989/09/07 |
|
Dissolved oxygen criteria |
Aquatic Life Criteria for Dissolved Oxygen (Saltwater) Cape Cod to Cape Hatteras (PDF)(140 pp, 6 MB) |
2000/11/01 |
822-R-00-012 |
Downstream |
Topic Page: Protection of Downstream Waters in Water Quality Standards |
|
|
Downstream |
[See Response to Sierra Club Petition ] |
2004/06/25 |
|
Downstream |
[See Favorable Supreme Court Decision Concerning Interstate Water Pollution, Memorandum from Raymond Ludwiszewski (Arkansas v. Oklahoma) ] |
1992/02/27 |
|
Downstream |
Templates for Narrative Downstream Protection Criteria in State Water Quality Standards |
2014/02/14 |
820-F-14-002 |
Downstream |
Protection of Downstream Waters in Water Quality Standards: Frequently Asked Questions(12 pp, 4 MB) |
2014/6 |
820-F-14-001 |
Downstream |
Decision Tree Tool for Downstream Protection |
2014/11/17 |
|
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 (PDF)(16 pp, 219 K) |
2001/02/22 |
|
Endangered Species Act Consultation |
Policy Guidance: Water Quality Standards and the Endangered Species Act (PDF)(2 pp, 803 K) |
2001/02/22 |
823-F-01-003 |
Endangered Species Act Consultation |
Endangered Species Consultation Handbook (PDF) (315 pp, 919 K) |
1998/03/01 |
|
Endangered Species Act Consultation |
Endangered Species Act Joint Guidance (PDF) (14 pp, 907 K) |
1992/07/27 |
|
Existing Uses |
[See Questions and Answers on EPA's Existing Use Policy, Letter to Mr. Derek Smithee, State of Oklahoma Water Resources Board ] |
2008/09/05 |
|
Existing Uses |
[See Determination of "Existing Uses" for Purposes of Water Quality Standards Implementation ]
Memorandum from Patrick Tobin |
1986/04/07 |
|
Existing Uses |
[See Interpretation of the Term "Existing Uses" Under the Antidegradation Policy ] |
1985/02/21 |
|
Fish and Shellfish Advisories |
[See Guidance: Use of Fish and Shellfish Advisories and Classifications in 303(d) and 305(b) Listing Decisions, Letter from Geoffrey Grubbs and Robert Wayland ] |
2000/10/24 |
|
Fish consumption |
Estimated per capita fish consumption in the United States (PDF)(262 pp, 12 MB) |
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 |
Recreational Criteria |
Water Quality Standards for Coastal Recreation Waters: Considerations for States as They Select Appropriate Risk Levels (PDF)(3 pp, 204 K) |
2006/08/01 |
823-F-06-012 |
Great Lakes |
Water Quality Guidance for the Great Lakes System: Supplementary Information Document (PDF)(515 pp, 41 MB) |
1995/03/01 |
820-B-95-001 |
Groundwater |
[See Water Quality Standards and Underground Waters, Memorandum from Joan Bernstein ] |
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 |
Human health criteria |
[See Human Health Ambient Water Quality Criteria and Fish Consumption Rates Frequently Asked Questions ] |
2000 |
|
Implementation Plans |
[See Revision of Water Quality Standards and Implementation Plans Under [Section] 303 of the Federal Water Pollution Control Act, Memorandum from William Frick ] |
1975/02/03 |
|
Interstate Waters |
[See National Stream Use Policy, Memorandum to Acting Director, Water Planning Division ] |
1972/10/15 |
|
Marinas |
[See Section 401 Certification of Marinas, Memorandum from Catherine Winer ] |
1985/11/12 |
|
Marine pH criteria |
[See Letter on Marine pH Criteria: EPA to Center for Biological Diversity ] |
2010/04/15 |
|
Metals criteria |
[See Modifications to "Interim Guidance on Determination and Use of Water-Effect ratios for Metals" and EPA’s "Recalculation Procedure when Deriving Site-Specific Criteria" ] |
1997/12/03 |
|
Metals criteria |
Interim Guidance on Determination and Use of Water-Effect ratios for Metals, Memorandum from Tudor Davies |
1994/02/22 |
823-B-94-001 |
Metals criteria |
[See Office of Water Policy and Technical Guidance on Interpretation and Implementation of Aquatic Life Metals Criteria ] |
1993/10/01 |
822-F-93-009 |
Mixing Zones |
[See Initial Zones of Dilution for Bacteria in Rivers and Streams, Memorandum from Ephraim King ] |
2008/11/12 |
|
Mixing Zones |
Compilation of EPA Mixing Zone Documents (PDF)(39 pp, 476 K) |
2006/07/01 |
823-R-06-003 |
Mixing Zones |
[See EPA Guidance on Application of State Mixing Zone Policies in EPA-issued NPDES Permits, Memorandum from Robert Perciasepe ] |
1996/08/06 |
|
Mixing Zones |
Allocated Impact Zones for Areas of Non-Compliance |
1995/03 |
EPA-823-R-95-003 |
Mixing Zones |
[See Mixing Zones for Water Quality Standards, Memorandum from Richard Stoll ] |
1979/05/01 |
|
Mixing Zones |
[See Decision no. 31 of the General Counsel on Matters of Law Pursuant to 40 CFR Section 125.36(m) ] |
1975/10/14 |
|
Mixing Zones |
[See Mixing Zones, Memorandum from Robert Zenner ] |
1973/10/02 |
|
Modeling |
Guidance Document on Dynamic Modeling and Translators (PDF) (30 pp, 1 MB) see page 18 |
1993/08/01 |
|
Monitoring |
Guidance Document on Monitoring (PDF) (30 pp, 1 MB) see page 29 |
1993/10/01 |
|
Monitoring |
State Water Monitoring and Waste Load Allocation (PDF)(51 pp, 3 MB) |
1985/10/01 |
440/4-85-031 |
Narrative Translator Criteria |
[See Option 3 of Section 303(c)(2)(B) Guidance, Memorandum from David Sabock ] |
1990/01/03 |
|
Natural Conditions |
[See A Framework for Defining and Documenting Natural Conditions for Development of Site-Specific Natural Background Aquatic Life Criteria for Temperature, Dissolved Oxygen, and PH: Interim Document ] |
2015/02/12 |
820-R-15-001 |
Natural Conditions |
Establishing Site Specific Aquatic Criteria Equal to Natural Background (“Tudor Davies Memo”) (1997) (PDF) |
1997/11/05 |
|
Nonpoint Sources |
Nonpoint Source Guidance |
1996/05/01 |
|
Nonpoint Sources |
Guidance Specifying Management Measures for Sources of Nonpoint Pollution in Coastal Waters (PDF) (822 pp, 46 MB) |
1993/01/01
|
840-B-92-002 |
Nonpoint Sources |
[See Nonpoint Source Controls and Water Quality Standards, Memorandum from Carl Myers ] |
1987/08/19 |
FY-87-49 |
Nonpoint Sources |
[See Answers to Questions on Nonpoint Sources and WQS ]
Memorandum from Lawrence Jensen |
1986/03/07 |
|
Nonpoint Sources |
Coastal Nonpoint Pollution Control Program: Program Development and Approval Guidance (PDF) (68 pp, 654 K) |
1993/01/01 |
841-B-93-003 |
Nutrients |
[See Bioconfirmation, Letter to Maine Department of Environmental Protection ] |
2011/12/22 |
|
Nutrients |
[See Response letter to the Mississippi River Petition, July 29, 2011 ] |
2011/07/29 |
|
Nutrients |
Technical Assistance for Developing Nutrient Site-Specific Alternative Criteria in Florida Exit |
2011/06/01 |
|
Nutrients |
[See March 2011 EPA Memo: Working in Partnership with States to Address Phosphorus and Nitrogen Pollution through Use of a Framework for State Nutrient Reductions ] |
2011/03/16 |
|
Nutrients |
[See Letter to New England Interstate Water Pollution Control Commission, March 1, 2011 ] |
2011/03/01 |
|
Nutrients |
[See EPA Response to the Maine Congressional Delegation’s January 21, 2011 Letter ] |
2011/02/15 |
|
Nutrients |
Using Stressor-response Relationships to Derive Numeric Nutrient Criteria Technical Guidance (PDF)(93 pp, 13 MB) |
2010/11/01 |
820-S-10-001 |
Nutrients |
[See An Urgent Call to Action: Report of the State-EPA Nutrient Innovations Task Group (August 2009) ] |
2009/08/27 |
|
Nutrients |
[See EPA Needs to Accelerate Adoption of Numeric Nutrient Water Quality Standards, OIG Report 09-P-0223 ] |
2009/08/26 |
09-P-0223 |
Nutrients |
Nutrient Criteria Technical Guidance: Wetlands (PDF)(156 pp, 16 MB) |
2008/06/01 |
822-B-08-001 |
Nutrients |
[See May 25, 2007 Policy Memo: Nutrient Pollution and Numeric Water Quality Standards ] |
2007/05/25 |
|
Nutrients |
[See Establishing numeric nutrient criteria, Letter from Ben Grumbles to the Natural Resources Defense Council ] |
2004/03/05 |
|
Nutrients |
Development and Adoption of Nutrient Criteria into Water Quality Standards, Memorandum from Geoffrey Grubbs (PDF) (21 pp, 67 K) |
2001/11/14 |
|
Nutrients |
Nutrient Criteria Technical Guidance Manual: Estuarine and Coastal Marine Waters (PDF)(362 pp, 27 MB) |
2001/10/01 |
822-B-01-003 |
Nutrients |
Nutrient Criteria Technical Guidance: Rivers and Streams (PDF)(253 pp, 21 MB) |
2000/07/07 |
822-B-00-002 |
Nutrients |
Nutrient Criteria Technical Guidance: Lakes and Reservoirs (PDF)(232 pp, 16 MB) |
2000/07/07 |
822-B-00-001 |
Nutrients |
National Strategy for the Development of Regional Nutrient Criteria (PDF)(53 pp, 3 MB) |
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 |
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 |
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 (PDF)(219 pp, 7 MB) |
1991/08/30 |
843-B-91-113 |
Reporting |
Integrated Reporting (IR) Guidelines under Sections 303(d), 305(b), and 314 of the Clean Water Act |
|
|
Seaward Extent of State WQS |
[See Seaward Extent of State Water Quality Standards, Memorandum from Cathy Winer ] |
1985/10/31 |
|
Sediment |
[See Promoting Water, Superfund and Enforcement Collaboration on Contaminated Sediments ] |
2015/02/12 |
|
Sediment |
Contaminated Sediment Management Strategy (PDF)(128 pp, 8 MB) |
1998/04/01 |
823-R-98-001 |
Sediment criteria |
Suspended and Bedded Sediments, Technical Guidance |
2003/08/20 |
|
Sediment criteria |
Procedures for the Derivation of Equilibrium Partitioning Sediment Benchmarks (ESBs) for the Protection of Benthic Organisms: PAH Mixtures |
2003/11 |
EPA-600-R-02-013 |
Site-specific criteria |
[See Establishing Site-Specific Aquatic Life Criteria Equal to Natural Background ] |
1997/11/05 |
|
Site-specific criteria |
Guidelines for Deriving Numerical Aquatic Site-Specific Water Quality Criteria by Modifying National Criteria (PDF)(2 pp, 10 K) |
1984/12/01 |
600-S3-84-099 |
Standards, General |
Strategy for Water Quality Standards and Criteria (PDF)(48 pp, 7 MB) |
2003/08/03 |
823-R-03-010 |
Standards, General |
Fact Sheet: Strategy for Water Quality Standards and Criteria (PDF)(4 pp, 271 K) |
2003/08/03 |
823-F-03-011 |
Standards, General |
Advanced Notice of Proposed Rulemaking for Water Quality Standards (PDF) (65 pp, 593 K) |
1998/07/07 |
Federal Register Vol. 63, No.129 Pages 36741-36806 |
Standards, General |
Priorities for Water Quality Criteria and Standards Programs FY 2017-2018 |
2016/04/08 |
|
Standards, General |
Water Quality Criteria and Standards Plan: Priorities for the Future (PDF)(60 pp, 3 MB) |
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)(561 pp, 30 MB) |
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 (PDF)(400 pp, 22 MB) |
1992/12/01 |
823-R-92-009 |
Standards, General |
[See Water Quality Standards, Memorandum from Jack Raven ] |
1984/02/02 |
|
Standards, General |
NOTE: This document is not the current version and is provided for historical purposes only. See the online Water Quality Standards Handbook for the latest version. |
1994/08 |
823-B-94-005a |
Submitting new or revised water quality standards to EPA |
[See Information for States and Tribes on submittal of new and/or revised water quality standards to U.S. EPA for review under section 303(c) of the Clean Water Act and Federal regulations at 40 CFR 131 ] |
2007/09/13 |
|
TMDL |
Guidance for Water Quality-based Decisions: The TMDL Process (PDF)(62 pp, 4 MB) |
1991/04/01 |
440/4-91-001 |
Toxic criteria |
Guidance for State Implementation of Water Quality Standards for CWA Section 303(C)(2)(B) (PDF)(26 pp, 1 MB) |
1991/03/01 |
823-R-88-100 |
Toxic criteria |
[See Memorandum from LaJuana Wilcher Announcing Development of Federal Rulemaking to Promulgate State Water Quality Standards (National Toxics Rule) ] |
1990/01/26 |
|
Toxic criteria |
[See Compliance with CWA Section 303(c)(2)(B), Memorandum from Martha Prothro ] |
1989/06/19 |
|
Toxic criteria |
[See Guidance for State Implementation of Water Quality Standards for CWA Section 303(c)(2)(B), Memorandum from Rebecca Hanmer ] |
1988/12/12 |
823-R-88-100 |
Toxic criteria |
[See Selection of Water Quality Criteria in State Water Quality Standards, Memorandum from Edwin Johnson ] |
1985/02/28 |
|
Toxic criteria |
[See Recalculation of State Toxic Criteria from October 1, 1982 ] |
1982/10/01 |
|
Toxic criteria |
[See Toxic Criteria Recommendations, Memorandum from Joseph Krivak re. November 28, 1980 ] |
1981/08/28 |
|
Tribes |
[See Strategy for Reviewing Tribal Eligibility Applications to Administer EPA Regulatory Programs (Strategy for Treatment in a Similar Manner to a State) ] |
2008/01/23 |
|
Tribes |
Tribal Grants under Section 106 of the Clean Water Act |
|
|
Tribes |
[See OST Expectations for Water Quality Standards for Indian Reservations for Tribes Treated as States, Memorandum from Tudor Davies ] |
1992/04/20 |
|
Tribes |
[See Guidance on Water Quality Standards and 401 Certification Programs Administered by Indian Tribes, Memorandum from Tudor Davies ] |
1991/12/31 |
|
Tribes |
[See Final WQS Regulation Amendment Concerning Indian Tribes, Memorandum from Tudor Davies ] |
1991/12/05 |
|
Tribes |
Reference Guide to Water Quality Standards for Indian Tribes (PDF)(44 pp, 2 MB) |
1990/01/02 |
440/5-90-002 |
Triennial Review |
Guidance: Coordinating CSO Long-Term Planning with Water Quality Standards Reviews (PDF)(80 pp, 4 MB) |
2001/07/31 |
833-R-01-002 |
Triennial Review |
[See Three-Year Quality Standards Review, Memorandum from Patrick Tobin ] |
1983/09/06 |
|
Use Attainability Analysis |
Improving the Effectiveness of the Use Attainability Analysis Process, Memorandum from Ephraim King (PDF) (2 pp, 392 K) |
2006/03/13 |
|
Use Attainability Analysis |
UAAs and Other Tools for Managing Designated Uses (PDF)(466 pp, 28 MB) |
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, 850 K) |
2005/03/01 |
|
Use Attainability Analysis |
Technical Support Manual: Waterbody Surveys and Assessments for Conducting Use Attainability Analysis, Volumes 1-3 (PDF) (622 pp, 21 MB) |
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 |
[See Checklist For Evaluating State Submission Of Discharger-Specific Water Quality Standards Variances ] |
2016/02/29 |
|
Variances |
[See Request for Views on Allowable Duration of Water Quality Standards Variances, Memorandum from Catherine Winer ] |
1992/01/24 |
|
Variances |
[See National Assessment of State Variance Procedures: Report ] |
1990/11/01 |
|
Variances |
[See Variances in Water Quality Standards, Memorandum from Edwin Johnson ] |
1985/03/15 |
|
Variances |
[See Applicability of the Part 25 "Public Participation" Regulations to the Approval of Variances from Water Quality Standards, Memorandum from Michele Corash ] |
1980/09/04 |
|
Variances |
[See Decision no. 58 of the General Counsel on Matters of Law Pursuant to 40 CFR Section 125.36(m) ] |
1977/03/29 |
|
Variances |
[See Decision no. 44 of the General Counsel on Matters of Law Pursuant to 40 CFR Section 125.35(m) ] |
1976/06/22 |
|
Variances and Downgrades |
[See Definitions of WQS Terms, Memorandum from Kenneth Mackenthun ] |
1979/07/03 |
|
Variances for Multiple Dischargers |
Developing Credible Rationales for Variances that Apply to Multiple Dischargers - Frequently Asked Questions(7 pp, 457 K) |
2013/03/29 |
820-F-13-012 |
Waste Load Allocations |
Technical Guidance Manual for Performing Wasteload Allocations, Book 6, Design Conditions (PDF)(68 pp, 2 MB) |
1986/09/01 |
440/4-87-004 |
Water Quantity |
[See State Authority to Allocate Water Quantities - Section 101(g) of the Clean Water Act ] |
1978/11/07 |
|
Waters of the US |
Clean Water Act Definition of “Waters of the United States” |
Current |
|
Wetlands |
[See Appendix E: An Approach for Evaluating Numeric Water Quality Criteria for Wetlands Protection ] |
1991/07/08 |
|
Wetlands |
Water Quality Standards for Wetlands: National Guidance (PDF)(65 pp, 3 MB) |
1990/07/01 |
440-S-90-011 |
Wetlands |
Wetlands and 401 Certification: Opportunities for States and Eligible Indian Tribes |
1989/04/01 |
|
Wetlands |
[See Clean Water Act Authority Over Wetlands, Memorandum from Cathy Winer ] |
1985/04/19 |
|
Wetlands |
An Approach for Evaluating Numeric Water Quality Criteria for Wetlands Protection(48 pp, 2 MB) |
1991/07/08 |
|
Wetlands |
Templates for Developing Wetland Water Quality Standards |
2016/05/12 |
|
What is a New or Revised WQS |
[See What is a New or Revised Water Quality Standard Under CWA 303(c)(3)? - Frequently Asked Questions ] |
2012/10/09 |
820-F-12-017 |