TMDL and 303(d) List - Clean Water Act Section 303(d) List of Impaired Waterbodies
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Section 303(d) of the Clean Water Act requires the identification of waterbodies that do not meet, or are not expected to meet, water quality standards (i.e., impaired waterbodies). The affected waterbody, and associated pollutant or stressor, is then prioritized in the 303(d) List. The Clean Water Act further requires the development of a Total Maximum Daily Load (TMDL) for each listing. The current list, approved by the EPA, is the 2006 303(d) List. The State and Regional Boards are currently working on updating the 303(d) list as part of the development of the 303(d)/305(b) Integrated Report. The Water Quality Control Policy for Developing California’s Clean Water Act Section 303(d) List (Listing Policy) describes the requirements for developing the 303(d) list in California.
- Impaired waterbodies in Region 5 that still need TMDLs
- Impaired waterbodies being addressed by USEPA Approved TMDLs (Region 5 starts on page 40)
- NEW - Microsoft Excel Version of the 2006 303(d) list for Region 5, 112 KB, MS Excel File
This file includes both listings requiring TMDLs and listings already being addressed by USEPA approved TMDLs. The file does not include potential source categories, which can be found in the pdf versions of the 2008 303(d) list at the links above.
2008 Update to the 303(d) Report and Development of 305(b) Report
In addition to the impaired waterbody list required by Clean Water Act Section 303(d), Clean Water Act section 305(b) requires states to develop a report assessing statewide surface water quality. The State and Regional Boards are currently working on the development of a 303(d)/305(b) Integrated Report which will address both an update to the 303(d) list and a 305(b) assessment of statewide water quality. The Integrated Report is scheduled to be completed in 2008.- Notice of Postponement/Revised Notice of Public Workshop on Assessment of Potential Temperature Impairments in the Merced, Tuolumne, Stanislaus, and San Joaquin Rivers, 45 KB, PDF (PDF info)
- Data and information submitted for consideration in development of the Integrated Report
- Jamie Ludwig, US Bureau of Land Management
- Submittal letter, 14 KB, PDF (PDF info)
- Diane Wisniewski, US Bureau of Reclamation
- Submittal letter, 14 KB, PDF (PDF info)
- W.E. Loudermilk, California Department of Fish and Game
- Submittal letter, 89 KB, PDF (PDF info)
- Merced River Temperature Data, 1.9 MB*, ZIP (ZIP info)
- Stanislaus River Temperature Data, 3.4 MB*, ZIP (ZIP info)
- Tuolumne River Temperature Data, 1.6 MB*, ZIP (ZIP info)
- San Joaquin River at Vernalis Temperature Data, 1.3 MB*, ZIP (ZIP info)
- John Sanders, California Department of Pesticide Regulation
- Submittal letter, 29 KB, PDF (PDF info)
- Michele Dias, California Forestry Association
- Submittal letter, 68 KB, PDF (PDF info)
- Marcia Ames, City of Redding
- Submittal letter, 82 KB, PDF (PDF info)
- David Briggs, Contra Costa Water District
- Submittal letter, 349 KB, PDF (PDF info)
- John H. Schroeter, East Bay Municipal Water District
- Submittal letter, 307 KB, PDF (PDF info)
- Joanne Hild, Friends of Deer Creek
- Submittal letter, 577 KB, PDF (PDF info)
- Tammie R. Candelario, Pacific Gas and Electric Company
- Submittal letter, 42 KB, PDF (PDF info)
- Wendell H. Kido, Sacramento County Regional Sanitation District
- Submittal letter, 89 KB, PDF (PDF info)
- Mike Connor, San Francisco Estuary Institute
- Submittal letter, 10 KB, PDF (PDF info)
- Kenneth Petruzzelli, San Joaquin River Group Authority
- Submittal letter, 25 KB, PDF (PDF info)
- Comments, 1.5 MB*, PDF (PDF info)
- Gary Reedy, South Yuba River Citizens League
- Submittal letter, 78 KB, PDF (PDF info)
- Sharon Stohrer, State Water Resources Control Board
- Submittal letter, 16 KB, PDF (PDF info)
- Cynthia Paulson for Turlock Irrigation District
- Submittal letter, 63 KB, PDF (PDF info)
- Alejandro R. Castillo, UC Cooperative Extension
- Submittal letter, 13 KB, PDF (PDF info)
- Lenwood Hall, University of Maryland
- Submittal letter, 25 KB, PDF (PDF info)
- Notice of Public Solicitation of Water Quality Data and Information for the 2008 Integrated Report
- Clarification of the Notice of Public Solicitation, 107 KB, PDF (PDF info)
- Notice of Public Solicitation, 775 KB, PDF (PDF info)
Regional Water Board staff will hold a public workshop on potential 303(d) listings for high temperatures in the rivers named above. Please note that the workshop date has been postponed to 25 September 2007.
The following people and organizations submitted data and information for consideration in the development of the 303(d)/305(b) Integrated Report during the solicitation period.
Information on the (previous) 2002 303(d) List
- The 2002 303(d) list
- Central Valley Water Board Final Staff Report on Recommended Changes to the 303(d) List (December 2001)
- Main Report, 274 KB, PDF (PDF info)
- Appendix A - Numeric Criteria Fact Sheets, 613 KB, PDF (PDF info)
- Appendix B - Fact Sheets for Recommended Changes, 698 KB, PDF (PDF info)
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