prop 1 logo

Storm Water Grant Program (SWGP) - Proposition 1 (Prop 1)

Prop 1 SWGP Background

Prop 1 (Assembly Bill 1471, Rendon) authorized $7.545 billion in general obligation bonds for water projects including surface and groundwater storage, ecosystem and watershed protection and restoration, and drinking water protection. The State Water Board will administer Prop 1 funds for five programs. Of the $7.545 billion, Prop 1 (Section 79747) provides $200 million in grant funds for multi-benefit storm water management projects.

Water Code section 79747 identifies funds available for multi-benefit storm water management projects which may include, but shall not be limited to: green infrastructure, rainwater and storm water capture projects and storm water treatment facilities. Storm Water Resource Plans, or functionally equivalent plan(s), are required to obtain grant funds for storm water and dry weather capture projects.


  • The Funding Award List for the Prop 1 SWGP Round 2 Solicitation is now available.
    A total of 67 proposals were submitted for a total of approximately $300 million in grant requests. Applicants awarded funding will be receiving a welcome email with a request for additional information that is time sensitive. Other applicants will also be individually notified of their funding status and provided information regarding how to communicate with DFA staff for feedback on their proposal, if desired.

Funding Information

Eligible Applicants: Public agencies, nonprofit organizations, public utilities, federally recognized Indian tribes, state Indian tribes listed on Native American Heritage Commission's California Tribal Consultation List, and mutual water companies.
Eligible Project Types: Planning - Development of Storm Water Resource Plans (SWRPs) that meet the requirements of Water Code section 10562 and the SWRP Guidelines, and project-specific planning projects. Applications for SWRPs and project-specific planning projects were only solicited for Round 1.

Implementation - Multi-benefit storm water management projects which may include, but shall not be limited to, green infrastructure, rainwater and storm water capture projects and storm water treatment facilities.
Funding Available: Planning Grants: ~$10 million awarded
Round 1 Implementation Grants: ~$80 million awarded
Round 2 Implementation Grants: ~$100 million awarded
Funding Source: Proposition 1
Loans or Grants: Grants
Application Solicitation Period: Planning and Implementation Round 1: CLOSED
Implementation Round 2 CLOSED
Program Guidelines: Storm Water Resource Plan Guidelines (adopted on December 15, 2015 - Resolution No. 2015-0077)
Appendix A: The Storm Water Resource Plan Self-Certification Checklist may be requested using the contact information below.
Appendix B: Useful Web Links
Round 1: Storm Water Grant Program Guidelines (adopted on December 15, 2015 - Resolution No. 2015-0076)
Round 2: Storm Water Grant Program Guidelines (adopted on October 16, 2019).

Funded Projects

For information regarding projects funded by the SWGP, please refer to the online Financial Assistance Application Submittal Tool (FAAST) to view project application information, check status of the funding award etc. If further assistance is needed, please contact the SWGP staff.  

Storm Water Resource Plans and Concurrence Review Process

For information related to the Storm Water Resource Plans (SWRPs) visit the SWRP webpage. The SWRP web page also includes a list of SWRPs and FE-SWRPs that the State Water Board’s Division of Financial Assistance has reviewed and concurred with.

Reference Materials

  • On May 12, 2020, a public webinar was held to provide an overview of the application process for the Round 2 SWGP Funding Solicitation.
  • Templates for the Round 2 funding application attachments were provided to individuals who signed up for the Storm Water Grant Program email list. These templates may also be requested by following the instructions in the solicitation notice (above).
  • Draft Grant Agreement Template for Round 2
  • Round 2 funding awardees may be required to submit, on a case by case basis, a legal opinion from the awardee’s counsel upon execution of the funding agreement. If your agency is required to submit a legal opinion, please use the provided template.
  • On October 16, 2019, the State Water Board adopted the amended Proposition 1 SWGP Guidelines for the Round 2 Implementation Solicitation.
  • On September 16, 2019, a public webinar was held to provide a summary of the proposed changes to the program guidelines for Round 2, and staff responses to questions submitted by attendees.
  • Sacramento State Office of Water Programs designed a California Phase II LID Sizing Tool through a Prop 84 SWGP Planning Grant. The Sizing Tool can be used to assist in selecting and sizing LID BMPs that meet the sizing requirements in the statewide Phase II MS4 permit.
  • The International Stormwater Best Management Practices (BMP) Database project website features a database of over 530 BMP studies, performance analysis results, tools for use in BMP performance studies, monitoring guidance and other study-related publications.

Contact Information

For general inquiries, contact us at:

Jennifer Toney, P.E.
Senior Water Resources Control Engineer
Storm Water Grant Program

Division of Financial Assistance
Storm Water Grant Program
State Water Resources Control Board
P.O. Box 944212
Sacramento, CA 94244-2120

  Sign up for the Storm Water Grant Program email list ("Financial Assistance" section).