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September 30, 2023

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What may be the nation’s largest estuary seems hidden in plain sight for many people

What is the largest estuary in the United States? This is a question loaded with confusion and open to interpretation, as you will soon see. Before we get to the likely answer — which may surprise you — let me share a few authoritative views on the subject: Chesapeake Bay Foundation: “Chesapeake Bay is the […]

February 28, 2023

Image of San Juan Islands from the Salish Sea Model">

Findings and reports: February 2023

Salish Sea Model provides insights on circulation and residence times The amount of time water circulates and “resides” in Puget Sound is of intense interest to regulators and emergency response officials who want to understand how quickly wastewater is flushed out of Puget Sound and into the ocean. A paper in the journal Estuarine, Coastal […]

June 26, 2022

PSI monthly roundup: June 2022

VIEW THE FULLY FORMATTED NEWSLETTER in your browser Boundary spanning in Puget Sound Ecosystem-based management is often a large-scale collaborative effort involving many distinct groups. Boundary spanning organizations such as the Puget Sound Institute can help to support communication and policy development across institutions. In a new paper in the journal Environmental Science & Policy, we look […]


March 2, 2022

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Seattle Aquarium honors work conducted at the Center for Urban Waters

Congratulations to our recent affiliate Dr. Zhenyu Tian for receiving the Seattle Aquarium’s Conservation Research Award! Tian, who is now an assistant professor at Northeastern University, has been recognized by the Aquarium for his work in 2020 to identify a chemical from automobile tires that has been killing Coho salmon in Puget Sound. Tian and […]

July 13, 2021

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Can biologists estimate the massive loss of shellfish caused by low tides, high temps?

The putrid smell of rotting shellfish on some beaches in Puget Sound and elsewhere along the West Coast were a clear sign that large numbers of clams, mussels, oysters and other intertidal creatures were killed from exposure to extreme low tides, record-breaking temperatures and a blazing hot sun. The total losses of shellfish that perished […]

April 16, 2021

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Environmental justice on the move: a few personal observations about change

I recently completed a much-involved writing project focused on environmental justice. It has been one of the most challenging, yet for me enlightening, efforts in my 45 years of covering the environment. My initial idea was to report on a plan by the Washington Department of Ecology to rewrite the regulations for the Model Toxics […]

December 4, 2020

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Discovery of toxic chemical in tires spurs scientific and regulatory interest

The discovery of a mysterious chemical that kills coho salmon in urban streams is expected to spawn new research throughout the world while possibly inspiring new demands for protective regulations. The deadly chemical, associated with automobile tires, was identified by researchers at the University of Washington’s Center for Urban Waters, which is affiliated with the […]

December 3, 2020

Stormwater picks up contaminants from vehicles. Photo: Daniel Parks (CC BY-NC 2.0) https://www.flickr.com/photos/parksdh/7014755513">

Could tire discovery go beyond impacts on coho?

Scientists have suspected for several years that chemicals from tire wear particles are to blame for the deaths of thousands of coho salmon that have returned to spawn in Puget Sound’s urban streams. Sometimes referred to as “pre-spawn mortality” or “urban runoff mortality syndrome,” these deaths typically occur in streams near roads, and scientists have […]

September 15, 2020

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Orca census: One death in January, but no births were reported until September

UPDATE, Oct. 6 The newest calf among the Southern Resident killer whales was officially designated J58 after being seen alive and healthy on Sunday. The calf is the offspring of J49, a 15-year-old female named Eclipse who has one surviving calf, J51 or Nova. Ken Balcomb of the Center for Whale Research had been withholding […]

March 19, 2020

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Sewer operators worry that toilet paper shortage will lead to more nasty clogs

With a multitude of people scrambling to buy toilet paper, and some going without, sewer utility officials across the country are worried about the possible repercussions of the TP shortage — such as clogged sewer lines. Toilet paper and wipes of all kinds have become the subject of a complex, wide-ranging and controversial debate. The […]