TMDLs in the Monterey Bay Region of California
This page summarizes documents and listings relating to Total Maximum Daily Load (TMDL) plans in the Monterey Bay Region of California. The page was created by the ENVS 560/L Watershed Systems class at CSUMB.
Contents
Background
Under 1987 provisions (section 304 (1)) to the Clean Water Act of 1972, states must identify and report all water bodies which do not meet water quality or beneficial use standards. Those impaired (polluted) water bodies not meeting water quality standards must be placed on the 303d list.
States must submit updated lists every two years. Along with identification of impaired water bodies, states must also identify stressors causing the impairment (i.e. pollutants), which are also identified on the 303d list. A remediation plan must then be developed and implemented for each impaired water body listed.
These plans are known as total maximum daily loads (TMDLs). TMDLs are used to define and achieve a total maximum daily load for each pollutant causing impairment within a water body. The list also identifies where a TMDL has been approved by the Environmental Protection Agency (EPA) and implementation is available, but water quality standards have not yet been met, or an action other than a TMDL is being used to address the issue.
Summary of listing categories
The CCRWQCB has assigned grouped 303(d) listings into the following categories. Only categories 4A, 4B, and 5 are included in the 303(d) list.[1]
- Category 1. All core uses are supported;
- Category 2. At least one core use is supported;
- Category 3. Insufficient information exists to make a determination;
- Category 4A. At least one core use is not supported, however "a TMDL has been developed and approved by USEPA and is reasonably expected to result in the attainment of the water quality standard within a reasonable, specified time frame (p.10, CCRWQCB)."
- Category 4B. At least one core use is not supported, however "an existing regulatory program is reasonably expected to result in the attainment of the water quality standard within a reasonable, specified timeframe (p.10, CCRWQCB)."
- Category 5. At least one core use is not supported. A TMDL needs to be developed.
Central Coast 303d list documents
The 303d list for the Central Coast region of California (Region 3) is maintained by the Central Coast Regional Water Quality Control Board. The 2006 303(d) list for the Central Coast region is available as a .pdf or .xls file[2][3]. The 2010 303(d) statewide list is available as an .xls file[4] but is not available as a Central Coast-specific document as of March 2014.
Monterey Bay area TMDL listings
Please see the following pages for information on 303(d) listed waterbodies and their impairments in the Monterey Bay region.
- Monterey Bay Area TMDL Listings (table)
- Monterey Bay Area TMDL Listings - Priorities, Progress, and Documents (list)
- Approaches to TMDL Development and Implementation in the Monterey Bay Area
Central Coast reports and listings, 2006-2008
- From the CCRWQCB web site, TMDL program, 303d-list page:
- Impaired waterbody (303d) list (.pdf).
- Impaired waterbody (303d) list (.xls)
- Clean Water Act Sections 305(b) and 303(d) Integrated Report for the Central Coast Region (approved 2009)
- Recommended changes since the 2006 list
- 2008 New or Revised Fact Sheets for the Central Coast region
- 2008 listings by category (see Summary of listing categories):
Statewide listings including the Central Coast, 2010
- From the State Water Resources Control Board 2010 Integrated Report website:
- Impaired waterbody (303(d)) list, without potential sources (.xls)
- Impaired waterbody (303(d)) list, with potential sources (.xls)
- New or revised fact sheets for Region 3 (Central Coast region)
- Miscellaneous changes for the Central Coast region
- Maps, data download, and other materials (2010)
- 2010 listings by category (see Summary of listing categories):
References
- ↑ Central Coast Regional Water Quality Control Board. 2009. Clean water act sections 305(b) and 303(d) integrated report for the Central Coast region. Public review draft April. http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/2008_0409_draft_integrated_report.pdf
- ↑ CCRWQCB. 2006. 2006 CWA Section 303(d) List of Water Quality Limited Segments Requiring TMDLs (Central Coast Region). http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/r3_06_303d_reqtmdls.pdf
- ↑ CCRWQCB. 2006. List of Water Quality Limited Segments Requiring TMDLs (Central Coast Region) http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/state_06_303dlist.xls>
- ↑ CCRWQCB. 2010. Combined California 2010 303(d) list with potential sources. http://maps.waterboards.ca.gov/webmap/303d/files/2010_USEPA_approv_303d_List_Final_122311wsrcs.xls
See also
- Central Coast Region Agricultural Waiver
- TMDL
- Monterey Bay Area TMDL Listings - Priorities, Progress, and Documents
- Table of 303d Listed Waters in Monterey Bay Region
- Approaches to TMDL Development and Implementation in the Monterey Bay Area
- TMDL for Fecal Coliform for the Lower Salinas River Watershed, Monterey County, California
- TMDL for Nutrients in Lower Salinas River Watershed, Monterey County, California
- TMDL for Chlorpyrifos and Diazinon in Lower Salinas River Watershed, Monterey County, California
- Table of 303d Listed Waters in Monterey Bay Region
- ENVS 560/L Watershed Systems class
Disclaimer
This page may contain student work completed as part of assigned coursework. It may not be accurate. It does not necessary reflect the opinion or policy of CSUMB, its staff, or students.