TMDL Projects

Central Coast - TMDL Projects

For more information on Total Maximum Daily Loads (TMDLs), please see our general information page on TMDLs.

Please see the lower section of this page called "TMDL Resources" for other TMDL related links.

TMDL Projects Currently in Development

• Elkhorn Slough and Bennett Slough biostimulatory substances TMDL
• Pinto Lake catchment TMDL addressing cyanobacterial blooms
• Salinas River watershed turbidity TMDL
• Santa Ynez River basin nutrients TMDL
• Pesticide Water Quality Criteria Development
• Salinas River watershed organophosphate pesticides and toxicity TMDL

The section below is a list of the all the TMDL Projects approved or in development.

TMDL Project Names - listed in alphabetical order

Approval dates indicate Central Coast Water Board approval.

• Aptos/Valencia Creek pathogen TMDL, approved May 8, 2009
• Arroyo de la Cruz indicator bacteria TMDL, approved May 17, 2011
• Arroyo Paredon diazinon TMDL, approved March 14, 2013
• Arroyo Paredon nitrate TMDL, approved December 5, 2013
• Bell Creek nitrate TMDL, approved May 30, 2013
• Cholame Creek indicator bacteria TMDL, approved May 17, 2011
• Chorro Creek nutrients and dissolved oxygen TMDL, approved July 7, 2006
• Clear Creek and Hernandez Reservoir mercury TMDL, approved March 19, 2004
• Corralitos Creek pathogen TMDL, approved March 20, 2009
• Dairy Creek dissolved oxygen TMDL, approved December 3, 2004
• Elkhorn Slough and Bennett Slough biostimulatory substances TMDL, in development
• Estrella River basin boron TMDL, approved December 5, 2013
• Franklin Creek nutrients TMDL (Carpinteria Salt Marsh Watershed), approved March 23, 2018
• Glen Annie Canyon, Tecolotito Creek, and Carneros Creek nitrate TMDL, approved March 7, 2014
• Jalama Creek chloride and sodium TMDL, approved May 30, 2013
• Las Tablas Creek and Lake Nacimiento mercury TMDL, approved May 16, 2003
• Los Berros Creek nitrate TMDL, approved May 3, 2012
• Los Osos and Warden Creek and Warden Lake wetland nutrient TMDL, approved December 3, 2004
• Morro Bay (including Chorro and Los Osos Creeks)
  • Pathogen TMDL, approved May 16, 2003
  • Sediment TMDL, approved May 16, 2003
• Pajaro River watershed (including Pajaro River, San Benito River, Llagas Creek and Tequisquita Slough)
  • Chlorpyrifos and diazinon TMDL, approved July 11, 2013
  • Fecal coliform TMDL, approved March 20, 2009
  • Nitrate TMDL, approved December 2, 2005 superseded by Pajaro River nutrients TMDL, July 12, 2016
  • Nutrients TMDL, approved July 30, 2015
  • Sediment TMDL, approved December 2, 2005
• Pinto Lake catchment TMDL addressing cyanobacterial blooms, approved July 16, 2020
• Salinas River watershed (lower Salinas)
  • Chlorpyrifos and diazinon TMDL, approved May 5, 2011
  • Fecal coliform TMDL, approved September 2, 2010
  • Nutrient TMDL, approved March 14, 2013
  • Organophosphate pesticides and Toxicity TMDL, in development
  • Salts TMDL in development
  • Sediment toxicity TMDL, approved July 14, 2017
  • Turbidity TMDL in development
• San Antonio Creek (Santa Barbara County) chlorpyrifos TMDL, approved May 3, 2012
• San Antonio Creek nitrate TMDL, approved November 19, 2015
• San Antonio River (lower) indicator bacteria TMDL, approved May 17, 2011
• San Lorenzo Creek (Monterey County) indicator bacteria TMDL, approved May 17, 2011
• San Lorenzo River watershed
  • Chlorpyrifos TMDL, approved May 29, 2014
  • Nitrate TMDL, approved September 15, 2000
  • Pathogen TMDL, approved May 8, 2009
  • Sediment TMDL, approved May 16, 2003
• San Luis Obispo Creek
  • Nutrient TMDL, approved September 9, 2005
  • Pathogen TMDL, approved December 3, 2004
• San Simeon Creek nutrients TMDL, in development
• Santa Maria River watershed TMDL
  • Fecal indicator bacteria, approved March 15, 2012
  • Nutrients, approved May 30, 2013
  • Pesticides, approved January 30, 2014
  • Salts, in development
• Santa Ynez River basin TMDL addressing nutrient pollution, in development
• Soquel Lagoon pathogens TMDL, approved May 8, 2009
• Tularcitos Creek indicator bacteria TMDL, approved May 17, 2011
• Watsonville Slough pathogens TMDL, approved March 24, 2006