Effectiveness Assessment

With the help of a Proposition 84 stormwater grant* CASQA developed this web portal to assist the stormwater community conduct assessments of stormwater program effectiveness. This portal provides a central repository for obtaining guidance, sharing data and information, and obtaining planning and assessment support.

* Note: Funding for this project has been provided in full or in part through an agreement with the State Water Resources Control Board. The contents of this document do not necessarily reflect the views and policies of the State Water Resources Control Board, nor does mention of trade names or commercial products constitute endorsement or recommendation for use.

Guidance Documents

A Strategic Approach to Planning for and Assessing the Effectiveness of Stormwater Programs

(June 2015)

The Municipal Stormwater Program Effectiveness Assessment Guidance document is an evolving document. As municipalities complete annual program assessments, additional data will become available that will assist in verifying links between program-wide best management practices implementation, pollutant load reduction, and eventual receiving water quality improvements.

Program Effectiveness Assessment and Improvement Plan (PEAIP) Framework

(April 2015)

The CASQA Program Effectiveness Assessment and Improvement Plan (PEAIP) Framework provides a recommended structure and approach for the PEAIPs that is consistent with the Phase II Permit and the CASQA guidance document, 'A Strategic Approach to Planning for and Assessing the Effectiveness of Stormwater Programs (February 2015).' The Framework is intended to provide statewide consistency for the traditional and non-traditional MS4 PEAIPs and a customizable, user-friendly format for agencies to use as they develop their individual documents. The Framework is also recommended for consideration by Phase I MS4 stormwater programs as they consider effectiveness assessments within the context of their programs.

Source Contribution Tools & Methodologies

CASQA conducted a comprehensive review of existing approaches and tools for use in evaluating source contributions (outcome level 4) from key source categories and target audiences. This work effort was coordinated amongst three CASQA subcommittees (Effectiveness Assessment, Best Management Practices, and Watershed and Impaired Waters) and produced the following:

Source Contribution Tools and Methodologies Online Database

(March 2018)

As a part of the comprehensive review of existing approaches and tools for use in evaluating source contributions (outcome level 4), CASQA developed a searchable database identifying the tools that may be used to estimate or calculate the source contributions, based on the pollutants of concern / conditions of concern (POC / COC), the potential sources, and/or best management practices (BMPs) that may be implemented. This user-friendly, web-based interface allows the user to access the database through the CASQA Stormwater Effectiveness Assessment web page and obtain the desired information by entering in key input parameters. It is anticipated that the database will be updated as new information and tools are developed.

Summary of the CASQA Source Contribution Tools and Methodologies Survey

(November 2017)

As a part of the comprehensive review of existing approaches and tools for use in evaluating source contributions (outcome level 4) from key source categories and target audiences, CASQA conducted a survey / literature review in Summer 2017. The survey was distributed to the CASQA membership and requested information related to the participants, sources, source controls for load reduction, pollutants of concern, source contribution determination or assessment tools, and challenges encountered when performing source assessments and estimating load reductions. A total of 85 surveys were received and evaluated. This document summarizes the results of the survey / literature review, which were used to guide the development of the Source Contribution Tools and Methodologies online database. 

Background Information

Effectiveness Assessment Baseline Report: Existing Practices and User Needs

(August 2014)

The Effectiveness Assessment Baseline Report provides a foundation for this web portal, and is a product of the State Water Resources Control Board's Proposition 84 stormwater grant; the report includes the following:

  • Summary of existing California Phase I and Phase II stormwater permit requirements
  • Summary of current assessment practices (effectiveness assessment approaches, metrics, and methods)
  • Survey of assessment needs and opportunities
  • Materials review and compilation (completed assessments, regulatory resources, and stormwater-related research and literature)

Summary of the CASQA Effectiveness Assessment Web Portal Surveys

(2014 - 2016)

Presentations

Find links to key effectiveness assessment presentations from webinars and CASQA meetings.