Municipal Resource Program

The Municipal Resource Program provides information, fosters collaboration, and offers guidance on new permit requirements and stormwater management solutions.

Business Resource Program

Second in our series of Innovative BMP Videos: Watch this video about this inexpensive, innovative and effective treatment device invented at the Port of Seattle!

Summer Lunchtime Webinar Series

The Washington Stormwater Center is pleased to present a series of summer lunchtime webinars on key topics of significance to municipal and business stormwater permittees, and other community partners.

Emerging Technologies - TAPE

We partner with the Department of Ecology to certify new stormwater treatment devices for use use in Washington State, as well as foster the development and use of new stormwater technologies.

Hybrid Low Impact Development Certificate Program

The Statewide Low Impact Development Training Program is transitioning to a hybrid system. Registration is now open for the online portion of the program! See the latest updates on the Hybrid Low Impact Development Certificate Program webpage and register today!

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upcoming events

This list of stormwater-related events and workshops is compiled as a free service. Washington Stormwater Center does not promote, endorse, or otherwise recommend any of the companies, individuals, or organizations presented here.

Current news


Ecology Seeks Comment on 2019 SWMMWW draft

Ecology is pleased to announce the release of the Draft 2019 Stormwater Management Manual for Western Washington (SWMMWW) for public comment. Also, in August 2018 the Draft 2019 Municipal Stormwater Permits are scheduled to be released for public comment.

Looking for Your Feedback

The comment period (for both the Draft 2019 SWMMWW and the Draft 2019 Municipal Stormwater Permits) will end on November 14, 2018. The front page of the manual has information for how to submit your comments on the manual. 

Amanda Heye, P.E.
Technical Editor

For more information visit the SWMMWW Website 

Shore Stewards guide to dealing with dog waste

Did you know that dogs across the Puget Sound produce an estimated 133,821,712 lbs of waste annually? Luckily, the folks at Shore Stewards have published this informative guide to help all you pet parents out there protect yourselves, your furry friends, and the environment by disposing of waste properly.

Putting Science to Work

Stormwater is a growing threat to surface waters and aquatic organisms nationwide. In recent years, green stormwater infrastructure best management practices (BMPs) are increasingly being used to mitigate stormwater impacts. In this project, conducted by Washington State University and the Washington Stormwater Center, permeable asphalt and bioretention BMPs were evaluated for their potential to improve stormwater quality and quantity. 

The basics of the research and its findings can be found in this summary. For the entire report, or for questions about this project, please contact Lisa Rozmyn.

Save the Date: MuniCon 2019

MuniCon 2019 logo

The Washington Stormwater Center—in partnership with the City of SeaTac and the Department of Ecology—is pleased to announce the third Washington Stormwater Municipal Conference (MuniCon). MuniCon 2019 will be held at Hilton Seattle Airport and Conference Center April 24 & 25, 2019.

This unique conference will focus specifically on addressing high-priority issues and challenges faced by municipal NPDES permittees statewide. We bring this conference to you with the goal of promoting broad communication, coordination, and sharing of valuable municipal tools and stormwater management approaches from permittees and other professionals across the state.

An advisory group is now being formed to review presentation topic categories and conference structure.

For information or to participate, contact Laurie Larson, WSC Municipal Program Coordinator, 253-445-4593.

A Future for Stormwater Management in Puget Sound

Thank you to everyone who attended our Winter Forum, A Future for Stormwater Management in Puget Sound! Forum presentation session videos and accompanying Powerpoint presentations have been posted on Stormwater U.

Please revisit and share

We encourage you to reference the materials provided, share this valuable information with your colleagues, and spread the word about Stormwater U. If you have any questions, please contact Laurie Larson (

Nancy Winters to Serve as Interim Assistant Director of the Washington Stormwater Center

Nancy Winters

After creating water programs at WSU Puyallup since 2005 and co-founding the Washington Stormwater Center (WSC) in 2010 with Director John Stark and UW Puget Sound Institute Director Joel Baker, Tanyalee Erwin is transitioning out of the WSC on March 31, 2018 to pursue other interests.

Nancy Winters will serve as the Interim Assistant Director of the Washington Stormwater Center. She has more than 25 years of professional experience in environmental programs implementation and management with special focus on stormwater pollution prevention, individual and general NPDES permit understanding. She has integrated technical and policy approaches in her work for local and state governments, as well as in the private sector. Recently she applied her knowledge of water chemistry to design and conduct research on runoff from roofing materials in a project that began at the Department of Ecology and continued at the WSC. She has advanced degrees in Limnology (biology, and chemistry of lakes) and Environmental Engineering. She is the Executive Director of a non-profit organization that teaches English in Tanzania East Africa. In her spare time Nancy enjoys hiking, kayaking, and cross-country skiing.

Registration for the Online Portion of the Hybrid LID Certificate Program is Open!

Hybrid LID Certificate Program logo

We are pleased to be offering a new year of the Hybrid Low Impact Development (LID) Certificate Program - formerly known as the Statewide LID Training Program! Beginning in 2018, the training program has transitioned from a solely in-person training system to a hybrid (online and in-person) system. The online, self-paced courses include the theoretical basis for designing and maintaining LID systems. The in-person trainings will provide critical practical skills and real-world examples taught by the foremost practicing experts in the field.

Learn more about the new program and register today

In-person trainings will be offered in the fall of 2018, with locations and dates to be determined.

Remember—you must register for both the in-person AND online portions of the certificate of your choice (LID Design and/or LID Operations & Maintenance) in order to receive that certificate. Working through the online curriculum is also required before attending the associated in-person trainings.

Read the full details of the new hybrid system on the program webpage
Register for the online portion of the LID Operations & Maintenance Certificate
Register for the online portion of the LID Design Certificate