Watershed Management Programs

The Los Angeles County MS4 Permit allows Permittees the flexibility to develop Watershed Management Programs (WMPs) or Enhanced Watershed Programs (EWMPs) to implement the requirements of the Permit on a watershed scale through customized strategies, control measures, and best management practices (BMPs). Participation in a Watershed Management Program is voluntary and allows a Permittee to address the highest watershed priorities, including complying with the requirements of Part V.A. (Receiving Water Limitations), Part VI.E (Total Maximum Daily Load Provisions) and Attachments L through R, by customizing the control measures in Parts III.A.4 (Prohibitions - Non-Storm Water Discharges) and VI.D (Minimum Control Measures). All documents associated with the the development and implementation of the 31 Watershed Management Programs are available below. If you have any questions or comments regarding the watershed management programs please contact Ivar Ridgeway, Senior Environmental Scientist of the Storm Water Permitting Unit at (213) 620-2150.

• Public Notice of Consideration of Petition for Review of the Los Angeles Water Board Executive Officer's Action, to Approve, the North Santa Monica Bay EWMP Pursuant to the LA County MS4 Permit
• March 3, 2016 Public Workshop on Revised Enhanced Watershed Management Programs
  • Notice of Public Meeting
  • Meeting Agenda
  • Audio Recording of Meeting
  • Presentations:
    • Los Angeles Water Board Staff
    • EWMP Group Presentations: EWMP group presentations can be found under the specific EWMP group by clicking on the link for the group's webpage in the table below
    • Paradigm Environmental - RAA Revisions for Six EWMPs: Upper LA River, Ballona Creek, Malibu Creek, Upper San Gabriel River, Upper Santa Clara River, and Dominguez Channel
    • Mr. Ray Tahir
• September 10, 2015 Board Hearing Petition Presentations
  • Regional Board Staff
  • NRDC, Heal the Bay, and LA Waterkeeper
  • LA River Upper Reach 2
  • Lower San Gabriel River and Lower LA River
  • Los Cerritos Channel Watershed Group
• Consideration of Petition for Review of the Los Angeles Water Board Executive Officer's Action, to Approve, with Conditions, Nine Watershed Management Programs Pursuant to the LA County MS4 Permit
• April 13, 2015 Public Meeting on Revised Watershed Management Programs
  • Notice of Public Meeting
  • Meeting Agenda
  • Audio Recording of Public Meeting
  • NRDC, Heal the Bay, and LA Waterkeeper Comments on Revised WMPs

  Note: Presentations given by WMP groups at the April 13, 2015 public meeting can be found under the specific WMP group by clicking on the link for the group's webpage in the table below.)
• Comments on Draft WMPs/IMPs/CIMPs/EWMP Work Plans
• Comments on Draft EWMPs
• Draft Watershed Management Program Review and Evaluation Questions
• GIS Files and Map of Watershed Management Areas
• Technical Advisory Committee