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August 6, 2025

Shoreline view of Puget Sound overlayed with photos of a cow, human, and bird to show potential sources that can be identified by Microbial Source Tracking.

Microbial source tracking for Puget Sound  

Friday, September 12 | 9:30 am – 12:30 pm PT on Zoom   Co-hosted with the Shellfish SIL Effective microbial source tracking is critical for safeguarding public health, restoring shellfish beds, and targeting pollution prevention efforts. Join leading researchers and fellow practitioners to explore emerging tools, regional efforts, and practical guidance to track and reduce fecal […]


June 12, 2025

Low oxygen challenge, part 3: Computer models spell out the extent of the water-quality problem

After more than eight years of study amid ongoing discussions, the Washington Department of Ecology has made public a far-reaching plan for reducing human sources of nitrogen that contribute to the destructive low-oxygen conditions in Puget Sound. The plan, called the Puget Sound Nutrient Reduction Plan, calls for reductions in nitrogen from sewage-treatment plants, agricultural […]


June 12, 2025

Low oxygen challenge, part 1: The debate over oxygen in Puget Sound

In Puget Sound, low oxygen levels are a proven threat to marine creatures, from fish to shellfish and even tiny organisms. This threat has long been recognized by scientists — particularly within slow-flushing bays and inlets where low levels of dissolved oxygen can impair sea life and occasionally create deadly conditions in late summer and […]


April 2, 2025

The “unstructured grid” used in the Salish Sea Model allows for greater resolution (smaller triangles) when studying complex water circulation, such as around the Hood Canal bridge. Graphic: Tarang Khangaonkar

Unpacking uncertainty: How experts recommend improving Puget Sound modeling

An external scientific review by independent experts is a common and valuable practice, particularly when the models have significant management implications. This ethos is why peer review is foundational to science in general. By providing an objective assessment, external reviewers can help ensure the models are robust and appropriate for the management decisions they’re being […]


December 12, 2024

Photo credit: C̀háʔba· and NEMO moorings. Photo: John Mickett/UW

Annual report documents Puget Sound’s marine conditions

The Puget Sound Ecosystem Monitoring Program (PSEMP) has released its 13th annual overview of Puget Sound’s marine water conditions. The report is funded in part by the Puget Sound Institute and is produced by 67 contributors from federal, tribal, state, and local agencies, academia, nonprofits, and private and volunteer groups.  The compilation looks back on the […]