U.S. MS4 Needs Assessment Survey

The WEF Stormwater Institute (SWI) is on a mission to better understand the challenges, drivers, and resource needs across the MS4 sector. As such, SWI is launching its third iteration of the National Municipal Separate Storm Sewer System (MS4) Needs Assessment Survey, which was originally established in 2018 to collect on a biannual basis. The primary objectives of the survey are to

• better understand MS4 program challenges and drivers,
• identify the information and resource needs of MS4 permittees, and
• approximate current funding levels and estimated funding needs in the MS4 sector.

2020 Results 2018 Results

The target audience of the survey is

• MS4 Permittee holders and
• program managers that manage clients’ MS4 permits.

The impact of this survey ranges from advocating with our partner organizations for

• closing the funding gap, which in 2020 was estimated to be $8.5 billion, through the Stormwater Recommendation Document
• using the data to elevate the stormwater sector as it was with the efforts of developing a dedicated Stormwater Category as part of the ASCE Infrastructure Report Card – this category debuted in 2021 and received a grade of D,
• providing pertinent technical resources to WEF’s stormwater sector member base.

The WEF Stormwater Institute's goal is to reach as many MS4 communities (phase I, phase II, and non-traditional MS4 permits) across the nation as possible, have the results significantly represent all 10 EPA regions, and surpass our previous responses.

2020 MS4 Needs Assessment Results

In the 2020 survey, WEF received 804 responses from 47 states, the District of Columbia, and Puerto Rico.  

The WEF Stormwater Institute gratefully acknowledges the MS4 Survey Work Team for their contribution to the development and deployment of the survey, as well as the analysis of the results.

• 2020 National MS4 Needs Assessment Survey Results Report (February 2021)
  • Appendix A – Survey Response Summary
  • Appendix B – Detailed Responses by Permittee Type and Group
  • Appendix C – 2020 Survey Questions
  • Appendix D – 2018 Phase I and Phase II Survey Questions
  • Appendix E – Detailed Existing Budget, Additional Funds, and Funding Gap Information

This second iteration of the MS4 Needs Assessment survey provided a Data Dashboard feature that enables users to filter data by permittee type, geographic region, and other characteristics. The dashboard seeks to improve the understanding of the challenges, needs, and drivers of stormwater programs. The Data Dashboard is powered by 2NDNATURE Software.

Watch a recording of the June 3, 2021 Webcast, WEF MS4 Survey and Dashboard: Stormwater Data Coming Alive.

2018 National MS4 Needs Assessment Survey Results

In 2018, the WEF Stormwater Institute polled more than 600 MS4 permittees in the first attempt of its kind to identify common challenges and needs among the diverse array of U.S. stormwater managers. Results of the survey underscored broad needs for dedicated sources of funding, infrastructure renewal or replacement, and clearer regulations among respondents.

• 2018 Survey Results - Executive Summary (September 2018)
• 2018 Survey Results - Full Report (May 2019)
• Press Release: First-Ever Stormwater Needs Survey Shows $7.5 Billion Annual Funding Gap

If you would like any additional information or have questions, please email Bianca Pinto at BPinto@wef.org.

National MS4 Needs Assessment Survey Work Team

• Scott Taylor, P.E., D.WRE (Chair), National Municipal Stormwater Alliance
• Fernando Pasquel, Arcadis
• James Gibson, Jr., Sanitation District No. 1 of Northern Kentucky
• Fatemeh Babakhani, Ph.D., P.E., Hubbell, Roth & Clark, Inc.
• Michael Beezhold, CPM, Kansas Department of Health and Environment
• Garrett Bergey, SDE, Inc.
• Tyler Carson, Arcadis
• Zach Henderson, Woodard & Curran
• Matthew Jones, Ph.D., P.E., Hazen and Sawyer
• Adrienne Nemura, P.E., Geosyntec Consultants
• Dan Radulescu
• Andrew Sauer, P.E., ENV SP, Burns & McDonnell
• James Schlaman, P.E., ENV SP, Black & Veatch Corporation
• Andrew Smith, P.E., CFM, ENV SP, Black & Veatch Corporation
• Mark Van Auken, P.E., ENV SP, Arcadis