Despite more than four decades of a Superfund cleanup along Tacoma’s industrial Tideflats, research suggests that large amounts of toxic chemicals like PCBs and PBDEs may still be entering the waterway. Our affiliates at the Center for Urban Waters are co-leading a new project to identify contaminant hotspots. When it was first designated in 1983, […]
September 16, 2025

October 7 roundtable about THORR, which maps river temperatures from space
The Salish Sea Science Roundtable online speaker series continues on Tuesday, October 7 from 12:30 – 1:30 pm. The University of Washington’s Thermal History of Regulated Rivers (THORR) tool transforms NASA’s Landsat satellite imagery into current and historical river temperature insights. Learn how advanced data-driven techniques enable accessible mapping of water temperatures across remote streams—vital for […]
August 6, 2025

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 […]
August 6, 2025

August 15: Temperature-dependent oxygen supply and demand — a pilot on marine life vulnerability in Puget Sound
Friday, August 15 from 11 am – 1 pm We’re excited to continue the Science of Puget Sound Water Quality workshop series, which explores emerging science and insights to help protect water quality in Puget Sound. Not only does warmer water hold less oxygen, but it simultaneously increases how much oxygen marine species need, so […]
July 30, 2025

Around the Sound: Juvenile humpback whale ‘stronger and energetic’ after recent rescue
A juvenile humpback whale entangled in more than 200 feet of rope and then freed earlier this month has been spotted off Galiano Island in British Columbia, prompting cautious relief among biologists who are monitoring the whale’s recovery. The whale, named Starry Knight, was seen by whale watchers last Friday, and was breaching and appeared […]
July 16, 2025

Annual orca count grows by one, as the Puget Sound whales stay on the hunt for food
Although an official census report is not due until October, it appears that the population of our southern resident killer whales has increased by one over the past year. That slight increase is the net result of four births and three deaths, according to the Center for Whale Research, which is responsible for the annual […]
June 12, 2025

Low oxygen challenge, part 4: Many actions may be needed to improve Puget Sound waters
A grand plan to reduce human sources of nitrogen in Puget Sound started coming into focus in 2019 when the issue of regulations reached a decisive point. After years of study and advances in computer modeling, experts at the Washington Department of Ecology were beginning to see what it would take to reduce human sources […]
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 2: Water-cleanup plans and the search for ‘reasonable’ actions
On a clear autumn day, the blue waters of Budd Inlet reflect the distant snow-capped Olympic Mountains. From the water’s surface, nobody can tell if low-oxygen conditions might be lurking below, as they often do, creating a stressful or even deadly environment for sea life. The fact that beauty can disguise the harsh reality of […]
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 […]