Stormwater Resource Plans

Storm Water Grant ProgramIn 2016 Sonoma Water was awarded a $484,627 storm water planning grant from the State Water Resources Control Board’s Storm Water Grant Program. Sonoma Water staff along with other agencies and watershed partners are now working together to collaboratively develop Stormwater Resource Plans (SWRP) for the Petaluma River Watershed and the Sonoma Creek Watershed. Senate Bill 985 (Pavley, 2014) requires that in order for entities to be eligible for any future state funds from voter approved bond measures for stormwater projects they must develop compliant Stormwater Resource Plans to guide project selection and implementation.

What is a Stormwater Resource Plan? 

A Stormwater Resource Plan (SWRP) is a non-regulatory, watershed-based and stakeholder-driven plan that builds on local stormwater management objectives and identifies and prioritizes projects that capture, treat or reuse stormwater runoff. These projects must provide at least two benefits which may include environmental enhancement, flood protection, groundwater recharge, water quality improvement or recreational opportunities.

Stormwater Resources Plan Document

Final Stormwater Resources Plan  - Update 1 (PDF, 8MB)

Final Plan Appendices - Update 1 (PDF, 6MB)

Sonoma Water Self-Certification Checklist (PDF, .9MB)

Plan Contents:

  • Executive Summary
  • Introduction
  • Southern Sonoma County Watershed Descriptions: Petaluma River and Sonoma Creek watersheds
  • Water Quality Compliance
  • Organization, Coordination and Collaboration
  • Quantitative Methodologies and Identification and Prioritization of Projects
  • Implementation Strategy and Schedule
  • Education, Outreach, and Public Participation
  • References
  • Appendices (A-J listed below)

A. List of Stakeholders Engaged
B. Project Evaluation Form and Process Checklists
C. Project Summaries
D. Volume Reduction Curves
E. Flood Management Curves
F. Petaluma River and Sonoma Creek Watersheds Groundwater Field Investigation Summary
G. Recommended Approach for Site Assessment for Groundwater Recharge Potential
H. Public Comments on Draft Southern Sonoma County Stormwater Resources Plan
I. Prop 1 Implementation Grant Eligible Projects
J. Storm Water Resources Plan Checklist and Self-Certification

Southern Sonoma SWRP Partners:

Led by the City of Ukiah, a Russian River Stormwater Resource Plan is being developed by the Russian River Watershed Association. Sonoma Water is a collaborating partner.

Contact information

Thank you for your interest and involvement!

Email: Susan Haydon, Project Specialist,

Phone: (707) 547-1937

Submit a project

Please use this form to submit a multi-benefit project to be considered for inclusion in the Southern Sonoma SWRP.  Helpful information can be found in the Stormwater Resource Plan Guidelines. Please contact Plan Manager, Susan Haydon, for guidance on submittal, eligibility, timing and Plan updates:  or (707) 547-1937.

Technical Advisory Committee (TAC) meetings

TAC meetings are open to the public.

TAC meeting 4, Jan. 17, 2018
City of Petaluma Offices, 202 N. McDowell Blvd, Petaluma
 9 a.m. - 11:30 a.m.


TAC meeting 3, Sept. 20, 2017
Valley of the Moon Water District Boardroom, 9:30 a.m. - 11:30 a.m.

TAC Meeting 2, July 26, 2017
City of Petaluma Offices, 10 a.m. - noon

TAC meeting 1, Feb. 27, 2017
Joint kickoff for Southern Sonoma and Russian River SWRPs
North Coast Regional Water Quality Control Board, 9 a.m. - 11 a.m.


Public Meetings

  • Tuesday, Nov. 14, 2017
    • 5:30 p.m. - 7 p.m.
    • David Yearsley River Heritage Center, Petaluma
    • 100 E D St., Petaluma, CA 94952
    • Agenda
    • Presentation
  • Wednesday, Nov. 15, 2017 - Meeting cancelled due to Flash Flood warnings

Completed grant deliverables



  • Frequently Asked Questions
  • Storm Water Resource Plan Guidelines
  • Storm Water Resource Plan Checklist
  • Watershed Atlas: interactive map for the community to explore watershed-focused features of interest like sub-watershed boundaries, access points, and conservation and development projects within the Petaluma River watershed.
  • Contaminant Data Display and Download Tool (CD3): visualization tool for accessing water quality data for the San Francisco Bay-Delta and northern montane regions. It is the primary tool for accessing and downloading the San Francisco Bay Regional Monitoring Program’s (RMP) long-term dataset and other project data stored in SFEI's Regional Data Center (RDC). Data stored in SFEI’s RDC are comparable with the state’s data management business rules and are regularly exchanged with the California Environmental Data Exchange Network (CEDEN).
  • Sonoma Ecology Center Knowledge Base: library of local and regional information needed for science-based watershed management in the Sonoma Valley. Monitoring and mapping data, reports, images, and other resources can be discovered and downloaded in this online digital library.
  • CA Phase II LID Sizing Tool: web-based tool that assists stormwater practitioners in selecting and sizing LID Best Management Practices (BMPs) that meet the sizing requirements set forth in California’s National Pollutant Discharge Elimination System (NPDES) permit for stormwater discharges from small municipal separate storm sewer systems (MS4s)
  • International Stormwater BMP Database: International Stormwater Best Management Practices (BMP) Database project website features a database of over 600 BMP studies, performance analysis results, tools for use in BMP performance studies, monitoring guidance and other study-related publications

For more information:

Please contact Susan Haydon at (707) 547-1937 or by email