- Albion River
- Big River
- Eel River, North Fork
- Eel River, Upper Main
- Eel River, Middle Fork
- Eel River, South Fork
- Elk River
- Freshwater Creek
- Garcia River
- Gualala River
- Klamath River
- Laguna De Santa Rosa
- Lost River, Upper
- Lost River, Lower
- Mattole River
- Navarro River
- Noyo River
- Redwood Creek
- Russian River
- Salmon River
- Scott River
- Shasta River
- Stemple Creek
- Ten Mile River
- Trinity River
- Trinity River, South Fork
- Van Duzen River
The 303(d) List of Impaired Waterbodies and The 305(b) Water Quality Assessment
The 303(d) List of Impaired Waterbodies
- 2006 CWA Section 303(d) List of Water Quality Limited Segments - 1Mb PDF – June 28, 2007
Section 303(d) of the federal Clean Water Act and 40 CFR §130.7 require states to identify waterbodies that do not meet water quality standards and are not supporting their beneficial uses. These waters are placed on the Section 303(d) List of Impaired Waterbodies. The List identifies the pollutant or stressor causing impairment and establishes a schedule for developing a control plan to address the impairment.
Placement on this list generally triggers development of a pollution control plan called a Total Maximum Daily Load (TMDL) for each waterbody and associated pollutant/stressor on the list. The TMDL serves as the means to attain and maintain water quality standards for the impaired waterbody.
The current 303(d) List is commonly known as the 2006 List since that was the year of the last major update. Since that time, several water bodies have been added to the list. The most recent addition is for the reach of the mainstem Klamath River from the Copco 1 Reservoir to Iron Gate Dam for microcystin toxins, which was added May 29, 2008, by the US EPA.
The 305(b) Water Quality Assessment Report
- 2006 Water Quality Assessment of the Condition of California Coastal Waters and Wadeable Streams – October 2006
2008 305(b) and 303(d) Integrated Report
- Notice of Availability of Draft Document, Public Comment Period, Public Workshops, and Public Hearing for the North Coast 2008 Integrated Report for the 305(b) Water Quality Assessment and the 303(d) List of Impaired Waters – January 16, 2009
- Staff Report for the 2008 Integrated Report for the Clean Water Act Section 205(B) Surface Water Quality Assessment and the 303(d) List of Impaired Waters (2008 Integrated Report) – May 21, 2009 – NEW
- Fact Sheets for Each Waterbody/Pollutant Pair Documenting Staff Recommendations – May 21, 2009– NEW
- List of Waterbodies Supporting Some Beneficial Uses (Integrated Report Category 2) – May 21, 2009– NEW
- List of Waterbodies with Insufficient Information to Determine Use Rating (Integrated Report Category 3) – May 21, 2009– NEW
- List of Impaired Waterbodies With USEPA-Approved TMDLs (Integrated Report Category 4a) – May 21, 2009– NEW
- List of Impaired Waterbodies Without USEPA-Approved TMDLs (Integrated Report Category 5) – May 21, 2009– NEW
- List of All Impaired Waterbodies (Integrated Report Categories 4a and 5) – May 21, 2009– NEW
- List of Miscellaneous Changes – May 21, 2009– NEW
For 2008, California is integrating the 303(d) List of Impaired Waters and the 305(b) Water Quality Assessment Report into a single report. This report is called the 2008 Integrated Report, and it will satisfy the requirements of both CWA Sections 303(d) and 305(b).
North Coast Regional Water Board staff developed 2008 Integrated Report for waters within the North Coast Region of California. Staff analyzed available monitoring data, including data submitted by interested parties (data submitted after February 28, 2007, will be considered during the next listing cycle).
Public Hearing on June 3, 2009
Based on public comments, Regional Water Board staff have revised the 2008 Integrated Report in the final “Staff Report for the 2008 Integrated Report for the Clean Water Act Section 305(b) Surface Water Quality Assessment and the 303(d) List of Impaired Waters.”
The Regional Water Board will hold a public hearing on the final Clean Water Act (CWA) Section 303(d) List of Impaired Waters section of the 2008 Integrated Report for the North Coast Region as follows:
June 3, 2009
Hearing Room, Regional Water Board Office
5550 Skylane Blvd, Ste A
Santa Rosa, CA
At the Public Hearing, the Regional Water Board will consider for approval each proposed listing change to the CWA Section 303(d) List of Impaired Waters, and will consider adoption of a Resolution in support of its recommendations to the State Water Resources Control Board.
Following Regional Water Board adoption, the CWA Section 303(d) List of Impaired Waters section of the 2008 Integrated Report will be considered by the State Water Resources Control Board. Following State Water Board approval, it will be considered by the US EPA.
Other 303(d) List Links
- Letter re: Klamath River Microcystin Toxin Impairment – May 29, 2008
- EPA’s Responsiveness Summary Re: Klamath Microcystin Listing – May 29, 2008
- EPA’s Staff Report Re: Klamath Microcystin Listing – March 13, 2008
- Letter re: Approval of 2006 303(d) List from US EPA to Water Boards – June 28, 2007
- State Water Board Resolution No. 2006-0079 Approving the 2006 303(d) List – Oct. 25, 2006
- More information on the 303(d) List from the US EPA (note: hosted on US EPA’s website)
Contact Information
Acting Unit Manager:
Matt St. John, Water Resources Control Engineer
707-570-3762
mstjohn@waterboards.ca.gov
Page Updated: May 21, 2009