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

On October 11, 2011, USEPA issued its final decision regarding the water bodies and pollutants USEPA added to California's 2010 303(d) List. This decision included all of the water bodies and associated pollutants identified in the November 12, 2010 letter with the exception of San Joaquin River (Mendota Pool to Bear Creek) for electrical conductivity.
On November 12, 2010, USEPA approved the inclusion of all waters to California's 2010 303(d) list of impaired waters requiring TMDLs and disapproved the omission of several water bodies and associated pollutants that meet federal listing requirements. USEPA provided public notice and the opportunity for public comment on the proposed additions which ended December 23, 2010.

External Links to USEPA's website:

Supporting documentation for USEPA's decision on California's 2010 303(d) List.
List and maps of USEPA added waters to California's 2010 303(d) List on USEPA Region 9 Media Center website for California Impaired Waters.

Resolution No. 2010-0040

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(3) combined list table (combines category 4a, 4b,and 5):

303(d) list - Excel file (without potential sources)

303(d) list - Excel file (includes potential sources)

Public Notice

On April 19, 2010, the public was invited to comment on the Staff Proposed 2010 Federal Clean Water Act Section 303(d) List of Water Quality Limited Segments For California. The State Water Board considered the proposed 303(d) List at its June 15, 2010 meeting. The June 15, 2010 meeting was converted to a workshop to receive public comment. Board Action was deferred to the August 4, 2010 meeting.

Change Sheet #1 (Circulated on June 8, 2010 for the June 15, 2010 Board Meeting)

Change Sheet #2

Change Sheet #3

Change Sheet #3 and 4 (Consolidated)

Staff Report

Response to Comments

Supporting information:

Decision Fact Sheets and Associated Lines of Evidence

Miscellaneous Changes