San Juan Creek Watershed Programs & Projects

Watershed Programs

Integrated Regional Watershed Management Program

The San Juan Creek Watershed is part of the South Orange County Watershed Management Area (WMA). The County of Orange, cities, water and wastewater agencies of South Orange County formed the South Orange County IRWM Group in 2004 and subsequently developed and adopted the South Orange County IRWM Plan. The IRWM Group established the South Orange County IRWM region as a cooperative framework for planning and implementing water management strategies in the region to improve water quality, integrate flood management, restore natural resources, and increase water supply and reliability. 

San Juan Watershed Management Plan:

San Juan Creek Watershed Management Study F5 Report:


Economic Appendix: Feasibility Phase

  1. Plate Oso 2
  2. Plates SJ1
  3. Plate SJ2
  4. Plates SJ3
  5. Plates TC1
  6. Plates TC2


  1. Sheet ER-01
  2. Sheet ER-02
  3. Sheet ER-03
  4. Sheet ER-04
  5. Sheet ER-05
  6. Sheet ER-06
  7. Sheet ER-07
  8. Sheet ER-08
  9. Sheet ER-09
  10. Sheet ER-10
  11. Sheet ER-11
  12. Sheet ER-12
  13. Sheet ER-13
  14. Sheet ER-14
  15. Sheet ER-15


  1. FC6 Sheets 01 09
  2. CS1 Sheets 01 13
  3. CS2 Sheets 01 08
  4. CS3 Sheets 01 08
  5. FC2 Sheets 01 12
  6. FC3 Sheets 01 15
  7. FC4 Sheets 01 14
  8. FC5 Sheets 01 17


San Juan Creek Watershed Bacterial Study - December 24, 2002:

Chapter 1

Chapter 2

Chapter 3

Bacteria Source Tracking Study

Watershed Workplans

The San Juan Creek Watershed Workplan (Workplan) identifies the management activities being undertaken by the Cities of Dana Point, Laguna Hills, Laguna Niguel, Mission Viejo, Rancho Santa Margarita, and San Juan Capistrano, the County of Orange, and the Orange County Flood Control District (the San Juan Creek Watershed Permittees) to address priority water quality constituents of concern in the creeks and streams of the San Juan Creek watershed. The Workplan is updated annually.


If there are any questions regarding the details of a document, or to obtain a hard copy or other alternative formats of the original document, or to have a document read to you, please contact the OC Public Works offices: 2301 N. Glassell St., Orange, CA, 92865 Monday through Friday, 7:00 am to 5:00 pm PST, by email at OC Watersheds, or by phone at (714) 955-0600.