2010 Integrated Report (Clean Water Act Section 303(d) List / 305(b) Report)

The State Water Board approved the 2010 Integrated Report on August 4, 2010. The 2010 Integrated Report includes changes to the 2006 Clean Water Act Section 303(d) list of impaired water bodies and Clean Water Act Section 305(b) report on the quality of waters in California.

• Integrated Report Categories
• The 2010 Integrated Report places each assessed water segment into one of the five non-overlapping USEPA categories based on the overall beneficial use support of the water segment. In California, the 303(d) list is made up of three of the Integrated Report categories, 5, 4A, and 4B. These categories contain water segments that are not meeting water quality standards or not expected to meet water quality standards.
• Category 5 — 303(d) list requiring the development of a TMDL
• Category 4A — 303(d) list being addressed by USEPA approved TMDL
• Category 4B — 303(d) list being addressed by an action other than a TMDL
• Category 3
• Category 2
• Category 1

• California 2010 303(d) combined list (combines category 4a, 4b, and 5)

• Supporting information:
• Decision Fact Sheets and Associated Lines of Evidence
• Miscellaneous Changes
• Administrative Record
• Staff Change Sheets 1, 2, and Consolidated 3 and 4

• Questions or Additional Information
• Please contact Shakoora Azimi-Gaylon at (916) 341-5508 or by email at SAGaylon@waterboards.ca.gov.