Completed TMDLs - Total Maximum Daily Load (TMDL) and the 303(d) List of Impaired Water Bodies

Quick Links

Alamo River Sedimentation/Siltation TMDL (Approved by U.S. EPA on June 28, 2002)
New River Pathogen TMDL (Approved by U.S. EPA on August 14, 2002)
New River Sedimentation/Siltation TMDL (Approved by U.S. EPA on March 31, 2003)
New River Trash TMDL (Approved by U.S. EPA on September 24, 2007)
Imperial Valley Drains Sedimentation/Siltation TMDL (Approved by U.S. EPA on September 30, 2005)
Coachella Valley Stormwater Channel Bacterial Indicators TMDL (Approved by U.S. EPA on April 27, 2012)
New River Dissolved Oxygen TMDL (Approved by U.S. EPA on November 16, 2012)

Project Details

Alamo River Sedimentation/Siltation
The TMDL was adopted by the Regional Board June 27, 2001, approved by the State Board on February 19, 2002, approved by the Office of Administrative Law on May 3, 2002, and approved by U.S. EPA on June 28, 2002. The following documents are now available:
Regional Water Board
Basin Plan Amendment
Resolution No. 01-100
TMDL Staff Report
Appendices to the TMDL Staff Report
Appendix A - Soil Association Descriptions
Appendix B - SWRCB Toxic Substances Monitoring Program
Appendix C - Source Analysis Data and Calculations
Appendix D - Load Allocation Calculations
Appendix E - Silt TMDL Technical Committee
Appendix F - Silt TMDL TAC BMPs
Appendix G - Recommendations of the UCCE
CEQA Checklist and Determination
Natural Environment Study

Imperial Valley Drains Sedimentation/Siltation TMDL
The TMDL was adopted by the Regional Board on January 19, 2005, approved by the State Board on July 21, 2005, approved by the Office of Administrative Law on September 8, 2005, and approved by U.S. EPA on September 30, 2005. The following documents are now available:

Regional Water Board

Basin Plan Amendment
Resolution No. R7-2005-0006
TMDL Staff Report
Appendices to the TMDL Staff Report
Appendix A - Silt TMDL TAC
Appendix B - Source Analysis
Appendix C - Allocations
Appendix D - Implementation Plan
CEQA Checklist and Determination
Natural Environment Study
Economic Impact Assessment
Responses to Public and Peer Review Comments
Staff Supplemental Report (9/14/04)

New River Pathogen TMDL
The TMDL was adopted by the Regional Board on October 10, 2001, approved by the State Board on March 21, 2002. It was also approved by the Office of Administrative Law on March 23, 2002, and approved by U.S. EPA on August 14, 2002. The following documents are now available:

Regional Water Board

Basin Plan Amendment
Resolution No. 01-197
TMDL Staff Report
Appendices to the TMDL Staff Report
Appendix A: Historical Bacterial Concentrations for New River at International Boundary
Appendix B: New River Fecal Coliform Results for 2000
Appendix C: Infectious Agents Potentially Present in Raw Domestic Wastewater
CEQA Checklist and Discussion

New River Sedimentation/Siltation TMDL
The TMDL was adopted by the Regional Board on June 26, 2002, approved by the State Board on November 19, 2002, approved by the Office of Administrative Law on January 13, 2003, and approved by U.S. EPA on March 31, 2003. The following documents are now available:

Regional Water Board

Basin Plan Amendment
Resolution No. R7-2002-0097
TMDL Staff Report
Appendices to the TMDL Staff Report
Appendix A: Soil Association Descriptions
Appendix B: SWRCB Toxic Substances Monitoring Program
Appendix C: Source Analysis Data and Calculations
Appendix D: Load Allocations
Appendix E: Silt TMDL Technical Advisory Committee
Appendix F: TAC Recommendations for On-Field Best Management Practices
Appendix G: Recommendations of the UC Cooperative Extension
CEQA Checklist and Discussion
Natural Environment Study

New River Trash TMDL
The TMDL was adopted by the Regional Board on June 21, 2006, approved by the State Board on April 18, 2007, approved by the Office of Administrative Law on August 2, 2007, and approved by U.S. EPA on September 24, 2007. The following documents are now available: