Gualala River Sediment Total Maximum Daily Load (TMDL)

Announcements

To be placed on the mailing list for this project, sign up under the Stay Informed section of this webpage. Information will be provided to the public throughout the project by posting quarterly fact sheets and relevant information, including notices of public meetings and other water quality information.

Fact Sheets

• First Edition – July 2023

Gualala River TMDL Overview

The Gualala River is included on the Clean Water Act 303(d) list for impairments associated with excessive sediment and high temperatures. A TMDL addressing sediment impairments was established by the U.S. Environmental Protection Agency (USEPA) in December 2001. The Regional Water Board prepared a Technical Support Document (TSD) that addressed sources of sediment and temperature impairments, loading capacities, and load allocations necessary to restore sediment and temperature conditions supportive of beneficial uses related to the cold water fishery in the Gualala River Watershed. The TSD served as the basis for the USEPA's TMDLs.

The Gualala River Sediment TMDL was included in Resolution R1-2004-0087, Total Maximum Daily Load Implementation Policy for Sediment Impaired Receiving Waters in the North Coast Region, adopted by the North Coast Regional Water Quality Control Board in November 2004. The text of the resolution may be viewed by clicking here.

• Final TMDL (PDF) (22 pp, 108K)
• Summary of Comments and Responses (11 pg, 26K)

• Gualala River Watershed Technical Support Document for the TMDL for Sediment
• Plate 1
• Plate 2
• Plate 3
• Plate 4
• Plate 5
• Plate 6
• Plate 7
• Plate 8