2025 Agenda Details
Keynote Presentations:
Navigating Change: How National Policies and Innovations Are Reshaping the Future of Stormwater Management
Seth Brown, Executive Director, National Municipal Stormwater Alliance
Navigating Change: How National Policies and Innovations Are Reshaping the Future of Stormwater Management
Seth Brown, Executive Director, National Municipal Stormwater Alliance
Fundamentals
For those desiring an introduction or refresher on elemental topics
Explore the Fundamentals of the 2025 Industrial Stormwater General Permit in this informative session. Learn more about the basics of the permit, catch up on key changes introduced in 2025, and gain practical compliance strategies from seasoned stormwater experts through lessons from the field.
Moderator:
Lisa Rozmyn, Assistant Director, Washington Stormwater Center
Amber Bailey, Senior Scientist, Parametrix
Molly Alar, Senior Scientist, Parametrix
Brandon Boyd, ISGP Permit Assistance Coordinator, Washington Stormwater Center
Learn about various perspectives involved in preparing for, conducting, and addressing the implications of facility inspections. Panelists will share insights on best practices, common challenges, and strategies for ensuring compliance, efficiency, and long-term success in facility management. Attendees will gain a comprehensive understanding of the inspection process from multiple viewpoints and leave with actionable takeaways for improving their own facility inspection practices.
Moderator:
Nathan Soccorsy, Principal Environmental Scientist, Anchor QEA
Speakers:
Jessica Kasmari, Environmental Specialist, Washington Department of Ecology
Wilbur Clark, Chief Operating Officer, Pacific Pile and Marine
Tisha Pagalilauan, Partner, Cascadia Law
Join us as we take a dive into the fundamentals of the SWPPP. This panel provides an opportunity to learn more about how to create an effective SWPPP and how to implement it at your facility. The professionals are here to discuss the processes of creation, implementation, common pitfalls, and important things to consider that are commonly overlooked.
Moderator:
Zoe Wickline, Inside Sales Coordinator, Laboratory Manager, Clear Creek Systems
Melody Kieneker, Senior Project Scientist, Landau Associates
Dan Cutugno, Senior Environmental Scientist, Maul Foster & Alongi
Jen Coryell, Senior Associate, Hazen and Sawyer
Industrial
For those ‘going deep’ on industrial applications and solutions
Explore the adaptation of stormwater treatment facilities to extreme rain events, focusing on system responses and strategies to prevent increased discharge. Attendees will gather insights on climate change, regional weather pattern shifts, and the importance of proactive planning using future prediction models rather than outdated historical data. Municipal, climate, and consultant perspectives will provide a comprehensive view on managing stormwater in evolving weather conditions.
Moderator:
Justin Sauter, Staff Engineer, Kennedy Jenks
Speakers:
Andrew Nakahara, Environmental Engineer, Haley & Aldrich
Cliff Mass, Professor of Atmospheric Sciences, University of Washington
Maud De Bel, Supervisor, CSO Projects, King County
A new 2025 ISGP and impactful cases on the US Supreme Court docket leaves many topics up for discussion. In this session, our panelists will discuss the legal impacts of the new permit, present case studies for discussion and provide their perspective on the legal decisions facing industrial facilities today.
Moderator:
Christine Nancarrow, Managing Principal, Pacific Stormwater
Ariel Mosbrucker, Senior Water Resources Engineer, Geosyntec Consultants
Maureen Bayer, Of Counsel, Tonkon Torp
Veronica Keithley, Partner, Stoel Rives LLP
This session tackles sticky and misunderstood situations under the Industrial Stormwater General Permit to help you maintain compliance. Speakers will present case studies and hypotheticals addressing issues such as requirements for discharges to ground, managing process water, extent of Level 2 and 3 corrective actions, substantially identical outfalls, and shared facilities.
Moderator:
Owen Reese, Associate Civil Stormwater Engineer, Herrera Environmental Consultants, Inc.
Speakers:
Joe Kalmar, Principal, Stormwater Engineer, Landau Associates
Cody Ennis, Industrial Stormwater Inspector, Washington Department of Ecology
Sigrid Tomlinson, Professional Staff, Anchor QEA
Municipal & Development
For those adopting municipal stormwater BMPs
Current ecology requirements for Phase I and II communities necessitate that communities focus on tree canopy mapping and implement new policies to protect trees. This work highlights the importance of evaluating land use activities and understanding the relationship between buffers and developable land, offering a comprehensive perspective on each drainage basin.
Moderator:
John Phillips, Director of Integrated Watershed Management, Parametrix
Speakers:
Julie Brandt, Surface Water Engineer, Parametrix
Kelli Jones, Surface Water Manager, City of Kirkland
Janet Geer, Supervising Surface Water Engineer, City of Bothell
Jennifer Adams, Senior Stormwater Scientist, SoundEarth Strategies
In this roundtable discussion, we will explore the Stormwater Management Action Plan requirements in the new 2024-2029 Western Washington Phase II Municipal Stormwater Permit. We’ll share key insights and lessons learned from the previous permit cycle and actively engage the audience about their own experiences, offering valuable takeaways to help Phase II public works directors and stormwater managers make strategic and opportunistic investments. Bring your questions!
Moderator:
Adam Tycaster, Marketing Manager, Geosyntec Consultants
Speakers:
Don McQuilliams, Operations Manager, City of Bellevue
Abbey Stockwell, Municipal Stormwater Permit Writer, Washington Department of Ecology
Christian Nilsen, Senior Water Resources Engineer, Geosyntec Consultants
Sherry Edquid, Project Manager, City of Tukwila
Larry Schaffner, Stormwater Program Coordinator, Thurston County
The Stormwater Management Manuals for Western and Eastern Washington were updated by the Washington State Department of Ecology in July 2024. This overview will highlight the key updates in the 2024 manuals and feature insights from two Phase I jurisdictions currently working on their manual updates, with draft versions due to Ecology in 2025 and final versions adopted in 2026.
Moderator:
Rebecca Dugopolski, Principal Engineer, Herrera Environmental Consultants, Inc.
Speakers:
Doug Howie, Stormwater Engineer, Washington Department of Ecology
Mark Wilgus, Engineer IV, King County
Mieke Hoppin, Civil Engineer, City of Tacoma
Emerging Contaminants
For those seeking the latest developments in contaminants
Emerging contaminants of concern (COCs) such as 6-PPD-q, PFAS, antibiotic resistance genes (ARGs), microplastics, tire-wear particles, and temperature are increasingly under scrutiny. Discover the reason why the current stormwater regulations don’t address these COCs, the need for additional research, and the implications for current and future projects.
Moderator:
Scott Kindred, Principal Water Resource Engineer, Kindred Hydro, Inc.
Speakers:
Madison Hattaway, Contaminants of Emerging Concern Coordinator, Washington Department of Ecology
Brandi Lubliner, Principal Engineer, City of Tacoma
Seth Brown, Executive Director, National Municipal Stormwater Alliance (NMSA)
Municipalities, industry and environmental stewards are dealing with emerging contaminants including PFAS, 6 PPD-Q and PBDEs. The session will focus on 6 PPD-Q results from recent stormwater studies and introduce in progress sampling studies on a wider range of emerging contaminants of concern in Washington stormwater.
Speakers:
Kent Patton, Director of Technical Services, Apex Labs
Dylan Ahearn, Ph.D., Principal Scientist, Information System Director, Herrera Environmental Consultants, Inc.
Chelsea Mitchell, Ph.D., Senior Ecotoxicologist in the Water and Land Resources Division, King County
Stormwater regulations are always evolving and including new and emerging contaminants of concern. Together we will examine treatment trends for these emerging contaminants and other best management practices to minimize the impact of these new compounds on the regulated community and our surface waters and environment. Through case studies on source control, pilot testing programs, media adsorption performance, PFAS destruction technologies, and waste management challenges, we will facilitate a dynamic discussion on innovative solutions and their potential applications in stormwater management.
Moderator:
Nate Holloway, Senior Project Manager, Kennedy Jenks
Speakers:
Mehrzad Emanuel, PFAS Technical Expert, Clear Creek Systems
Somnath Mukherjee, Senior Controls Engineer, Aquagga
Megan King, Aviation Contamination Program Manager, Port of Seattle
Showcase: Excellence in Stormwater Innovation
Recent progress in urban stormwater is reshaping the way we perceive and manage stormwater flows. Driven by meaningful advancement in artificial intelligence and real-time monitoring, nano-enabled materials, and bio-augmented and low-impact development, new technologies are ushering in a more sustainable paradigm with respect to the treatment, capture, and reuse of stormwater. This series of rapid lightning talks will present a status update on technology and innovation within the stormwater industry, highlighting the significant progress that has been made in protecting sensitive resources, augmenting water supplies, and restoring ecosystem services in Washington and across the U.S. Lightning talks will conclude with a short panel-style Q&A with conference reception to follow.
Stormwater Challenges and Opportunities
Dr. Thomas Igou
Director of Innovation
WaterTectonics
Artificial Intelligence and Smart Stormwater Management
Dr. Jeffrey Johnson
Director of Water Innovation
Oldcastle Infrastructure
CSU Spur Hydro Testbed Facility: Bioretention and Adsorptive Media
Dr. Sybil Sharvelle
Professor of Civil & Environmental Engineering
Colorado State University
Low-Cost Media and Green Composites for Stormwater Treatment
Dr. Jessica Ray
Endowed Assistant Professor of Civil & Environmental Engineering
University of Washington

Vince McGowan, PE
Water Quality Program Manager
Washington Department of Ecology
Washington’s Stormwater Strategy: How the State’s Permitting Program is Addressing New Concerns
This year’s morning keynote will feature an engaging and informative conversation with Vince McGowan, Water Quality Program Manager at the Washington Department of Ecology. In a question-and-answer format, Vince will discuss a range of stormwater topics addressed by Ecology’s water quality program, including stormwater permits and guidance updates, responding to new science, and the latest policy developments.
Vince McGowan, PE leads the Water Quality Program at the Washington State Department of Ecology. He has spent most of his career working in environmental regulation, with a focus on permitting. In his current role, he enjoys supporting the program’s 350 innovative, hard-working staff in their clean water work across the state.

Seth Brown
Executive Director
National Municipal Stormwater Alliance
Navigating Change: How National Policies and Innovations Are Reshaping the Future of Stormwater Management
The stormwater sector is experiencing significant levels of dynamism. Policies and legal rulings at the national level are re-shaping the landscape of many environmental areas, including stormwater. The new administration at the federal level has signaled to make stark shifts in priorities and actions in administrative and environmental areas. Growing research findings are revealing the impacts of emerging contaminants on water quality as well as human and ecosystem health, and regulators are considering how to address these new pollutants of interest. Water quantity challenges are evolving in the face of shifting precipitation patterns. Innovations in stormwater management technologies and approaches to address both quantity and quality issues of today and tomorrow. Hear how these challenges and topics are evolving at the national level and what national-level groups are doing to not only track these issues, but to provide solutions as well.
Seth Brown has over 25 years of experience in the water sector and serves as the Executive Director of the National Municipal Stormwater Alliance, a 501(c)(3) organization representing stormwater-focused groups in 26 states across 9 of the 10 U.S. EPA regions, encompassing over 4,400 MS4s. He is also the Principal and Founder of Storm and Stream Solutions, LLC. Seth holds a Ph.D. in Civil Engineering from George Mason University and teaches water-related courses at Virginia Tech and the University of Maryland Eastern Shore. He is a licensed professional engineer in the state of Maryland.