Estrella River Basin Boron TMDL


Problem Statement - High levels of boron are currently impairing designated beneficial uses of the Estrella River and Cholame Creek.  This project establishes a Total Maximum Daily Load (TMDL) for boron in streams of the Estrella River Basin, and an associated implementation strategy to rectify the identified boron water quality impairments of surface waters.


  • February 13, 2014 - USEPA approves the Estrella River Boron TMDL
  • January 8, 2014 - Factsheet #2
  • December 5, 2013 - Central Coast Water Board Adopts Estrella River Boron TMDL
    • Staff Report (A summary of the TMDL project for Water Board members and the interested public)
    • Resolution No. 2013-0058 (An action item the Water Board votes on to formally adopt the TMDL)
    • Project Report (A technical report that provides the scientific and policy-basis for the TMDL)
  • August 19, 2013 - Factsheet

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Status and Public Notices

  • Status: Fully approved and effective.
  • Public Notice: None at this time.

Approval status

  • Central Coast Water Board
    - adopted December 5, 2013.
  • US Environmental Protection Agency
    - approved February 13, 2014, which is the effective date.