303(d) Impaired Water Bodies / 303(d) List

The 303(d) List of Impaired Water Bodies
Los Angeles Region - 303(d) List of Water Quality Limited Segments

2008 303(d)/305(b) Integrated Report

The 303(d) list of water quality limited segements

The Federal Clean Water Act Section 303(d) requires that States assess the quality of their waters every two years and publish a list of those waters not meeting the water quality standards established for them.  Water quality standards include beneficial uses, water quality objectives necessary to protect these uses and the antidegradation policy, and are found in the Basin Plan. For water bodies placed on the 303(d) List of Water Quality Limited Segments, states are required to develop Total Maximum Daily Loads (TMDLs) for the pollutant(s) that are causing standards impairment.

Water bodies are included on the 303(d) List of Water Quality Limited Segments after evaluation of existing water quality data using the methodology for determining impairment identified in the Water Quality Control Policy for Developing California's Clean Water Act Section 303(d) List and the Functional Equivalent Document, both adopted by the State Water Resources Control Board in September 2004.

Once a water body is placed on the 303(d) List of Water Quality Limited Segments, it remains on the list until a TMDL is adopted and the water quality standards are attained or there are sufficient data to demonstrate that water quality standards have been met and delisting should take place.

Regional Board Approved 303(d) List

• Board Adopted Resolution (posted Sep 21, 2009)
• Los Angeles Region Integrated Report Clean Water Act Section 305(b) Report and Section 303(d) List of Impaired Waters.
  (posted Sep 21, 2009)
  
  • Appendix A - Public Solicitation Letters
  • Appendix B - Integrated Report Category 2 Waterbodies Supporting Some Beneficial Uses
  • Appendix C - Integrated Report Category 3 Waterbodies with Insufficient Information
  • Appendix D - Integrated Report Category 4 Water Quality Limited Segments Fully Addressed
  • Appendix E - Integrated Report Category 5 Water Quality Limited Segments Not Fully Addressed
  • Appendix F - List of All Waterbody Impairments (Categories 4 and 5) (The Updated 303(d) list)
  • Appendix G - Fact Sheets Documenting 2008 Revised Listing Decisions (posted Oct 19, 2009).
  • Appendix H - Fact Sheets Documenting Miscellaneous Changes to the Integrated Report
  • Appendix  I - All References Used in Development of the 2008 Integrated Report
    
    
    
• View the Draft Documents
  

Contact Person regarding the 303(d) List of Water Quality Limited Segements
If you have any questions or comments regarding the 303(d) List please contact Man Voong at (213) 576-6690 or email at mvoong@waterboards.ca.gov.