Franklin Creek Nutrients TMDL (Carpinteria Salt Marsh Watershed)


Problem Statement - Streams of the Franklin Creek watershed do not support a range of beneficial uses and the impairments constitute serious water quality problems. Currently, designated drinking water supply (MUN), aquatic habitat (WARM, COLD, SPWN), and groundwater recharge (GWR) beneficial uses are not being supported. For example, 272 of 288 water quality samples (95%) exceed the MUN water quality objective. Franklin Creek also does not meet non-regulatory recommended guidelines for nitrate in agricultural supply water (AGR) for sensitive crop types, indicating that designated agricultural supply beneficial uses may be adversely impacted.

Implementation of the proposed TMDL should reduce or eliminate nutrient pollution that impact human health (drinking water) and prevent the degradation of aquatic habitat, both of which are high priorities of the Central Coast Water Board.


  • May 9, 2019 - USEPA Approval Document
  • March 4, 2019 - Office of Administrative Law (OAL) Approval Document
  • November 6, 2018 – State Water Board Approval Document
  • March 23, 2018 – Central Coast Water Board Approved Documents
  • March 9, 2018 - Central Coast Water Board Hearing Documents for March 22-23, 2018 Board Meeting
    • Staff Report (A summary of the TMDL project for Water Board members and the interested public)
      • Attachment 1: Resolution R3-2018-0006 and Basin Plan Amendment Language
      • Attachment 2: TMDL Report: “Total Maximum Daily Loads for Nitrogen and Phosphorus Compounds in Streams of the Franklin Creek Watershed” (Includes Appendix A - C)
      • Attachment 3: CEQA Checklist and Analysis
      • Attachment 4: Notice of Opportunity for Public Comment
      • Attachment 5: Notice of Public Hearing
  • December 15, 2017 - Documents available for public review and comment (December 15, 2017 - January 29, 2018)

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Status and Public Notices

  • Status: Approved.
  • Public Notice: None at this time.

Approval status

  • U.S. Environmental Protection Agency
    - approved May 9, 2019
  • Office of Administrative Law
    – approved March 4, 2019
  • State Water Board
    – adopted November 6, 2018
  • Central Coast Water Board
    – adopted March 23, 2018.