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Monitoring, Assessment and TMDLs
| Monitoring, Assessment and Total Maximum Daily Loads (TMDLs) Quick Finder | ||||
EPA-Established TMDLs in Progress
Although most TMDLs are adopted by states, territories, or authorized tribes and then approved by EPA, EPA also establishes TMDLs in some cases if:
- EPA disapproves TMDLs submitted by states, territories, or authorized tribes
- States, territories, or authorized tribes do not submit TMDLs in a timely manner
- EPA is required to do so pursuant to litigation settlements or judicial orders
- States ask EPA to establish TMDLs for a particular water body
You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more about PDF, and for a link to the free Adobe Reader.
EPA is currently in the process of developing TMDLs for several waters in California. EPA is developing these TMDLs in cooperation with the State of California, pursuant to consent decrees which require EPA to establish certain TMDLs for water bodies in California.
Draft documents for EPA-established TMDLs will be posted here when they become available.
On this page:
Finalized documents for EPA-established TMDLs are also available.
Los Cerritos Channel Metals TMDLs—Draft for public review
EPA is establishing the Los Cerritos Channel Metals TMDLs in lieu of California because of consent decree obligations. EPA is providing the public the opportunity to review these proposed TMDLs. (See public notice and draft TMDLs document below.)
Comment period is closed. We will prepare a responsiveness summary that demonstrates how public comments were considered in the final TMDL decisions. The responsiveness document will be available at this website when the TMDLs are established.
Contact Information
Karen Irwin (irwin.karen@epa.gov) U.S. EPA
75 Hawthorne Street
San Francisco, CA 94105
(415) 947-4116
Fax (415) 947-3537
- Los Cerritos Channel Monitoring Station TMDL Appendices (PDF) (37 pp, 1.6M)
- Los Cerritos Channel Monitoring Station TMDLs for Metals (PDF) (52 pp, 1.7M)
Public notice regarding EPA proposed TMDLs for Los Cerritos Channel Watershed.
EPA is establishing Metals TMDLs in freshwaters of Los Cerritos Channel. EPA is providing the opportunity for public review and comment on the proposed TMDLs. The comment period is closed. See the attached file for public notice and website link to the draft TMDLs documents.
The files below provide additional information for the Los Cerritos Channel TMDLs:
- Existing NPDES permits within the watershed (XSL)
- GIS files relevant to delineation of watershed (info provided to EPA by LA RWQCB who relied on LA County data layers.)GIS shape files (.zip) (14 files, .dbf, .prj, .sbn, .sbx, .shp, .shx, .xml in zipped archive)
Lost River Nitrogen and Biochemical Oxygen Demand (BOD) TMDLs
The LOST RIVER TMDLs were finalized by EPA in December 2008. Please click on the link "Final TMDLs" to access those TMDLs and related documents.
Klamath River Temperature, Dissolved Oxygen, Nutrient, and Microcystin TMDLs
Public Draft of California Klamath River Mainstem TMDLs
The state and federal public comment period for California's Public Review Draft Staff Report for the Klamath River TMDLs, addressing temperature, dissolved oxygen, nutrients and microcystin impairments (the Public Review Draft TMDLs) closed August 27, 2009. View the comment letters and attachments received by Regional Water Board staff here. 
These documents are also posted at the North Coast Regional Water Board's Web site.
The North Coast Regional Water Quality Control Board and EPA jointly issued public notice to solicit comment on the Public Review Draft Klamath River TMDLs, and to announce public workshops. Pursuant to a consent decree entered into by the U.S. Environmental Protection Agency, the Klamath River TMDLs are scheduled to be approved by December 2010. View the full text of the Notice of Availability and the Draft TMDL documents.
Klamath River Public Review Draft TMDL Documents
- Revised Notice of Availability of Draft TMDL Document, Public Comment Period, and Public Workshops (PDF) (4 pp, 36K)
- The Klamath River Public Review Draft TMDL is being made available by chapter (June 2009).
- Cover Page & Table of Contents (PDF) (30 pp, 478K)
- Chapter 1 - Introduction (PDF) (27 pp, 5.8 M, Large File)
- Chapter 2 - Problem Statement (PDF) (104 pp, 1.5M)
- Chapter 3 - Analytic Approach (PDF) (20 pp, 215K)
- Chapter 4 - Pollutant Source Analysis (PDF) (37 pp, 496K)
- Chapter 5 - Allocations of and Numeric Targets (PDF) (29 pp, 654K)
- Chapter 6 - Implementation Plan (PDF) (59 pp, 330K)
- Chapter 7 - Monitoring Program (PDF) (32 pp, 758K)
- Chapter 8 - Antidegradation Analysis (PDF) (2 pp, 13K)
- Chapter 9 - California Environmental Quality Act (CEQA) Environmental Analysis (PDF) (97 pp, 871K)
- Chapter 10 - Economic Analysis for Public Review (PDF) (23 pp, 295K)
- Chapter 11 - Public Participation (PDF) (5 pp, 63K)
- Appendix 1 - Proposed Site-Specific Dissolved Oxygen Objective for the
Klamath River in California (PDF) (18 pp, 157K) - Appendix 2 - Nutrient Numeric Endpoint Analysis (PDF) (46 pp, 596K)
- Appendix 3 - Nutrient Dynamics (PDF) (26 pp, 325K)
- Appendix 4 - Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia,
and pH on Salmonids (PDF) (53 pp, 350K) - Appendix 5 - Fish and Fishery Resources (PDF) (36 pp, 1.7M)
- Appendix 6 - River Model for TMDL Development (PDF) (183 pp, 4.2M)
- Appendix 7 - Response to Peer Review Comments on Draft Klamath River TMDLs (PDF) (40 pp, 286K)
- Appendix 8 - Maps of the Klamath River Basin in California Showing the Locations of Known Thermal Refugia (PDF) (7 pp, 706K)
For additional information please view our Web page on activities in the Klamath River Basin.
Contact Information
Gail Louis (louis.gail@epa.gov)
(415) 972-3467
Susan Keydel (keydel.susan@epa.gov)
(415) 972-3106
U.S. EPA
75 Hawthorne Street
San Francisco, CA 94105
Fax (415) 947-3537