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March 28, 2024

Test tube labeled 'estrogen.'">

Ask a scientist: Are human-derived hormones like estrogen harming fish in Puget Sound?

Hormones such as estrogens that humans create in their own bodies are entering Puget Sound through wastewater, raising concerns about their effects on fish and other wildlife. We spoke with Puget Sound Institute scientist Maya Faber about how environmental exposure to human-derived estrogen can alter the reproductive cycles of male and female fish. The effects […]

March 22, 2024

Water drop image courtesy of Bureau of Ocean Energy and Management">

Water affordability study approved by WA Legislature

Puget Sound residents struggling to pay high water utility fees could benefit from a study funded this month by the Washington Legislature. The legislation coincides with research sponsored by the Puget Sound Institute that quantifies wastewater utility costs for the region. The funding for the study is part of Senate Bill 5950, omnibus legislation passed […]


November 29, 2023

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Latest Puget Sound marine waters overview now available

Announcement from the Puget Sound Ecosystem Monitoring Program: Today, the Puget Sound Marine Waters Work Group of the Puget Sound Ecosystem Monitoring Program released the eleventh annual report on marine water conditions in Puget Sound. The report combines a wealth of data from comprehensive monitoring programs and provides a concise summary of what was happening […]

November 8, 2023

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Puget Sound ecosystem holding on, but recovery remains uncertain, says latest status report

Efforts to restore ecological health to Puget Sound have largely failed to meet recovery goals, yet fish and wildlife populations are still hanging on, according to a new report that describes many struggling populations as neither increasing nor decreasing to a significant extent. The latest State of the Sound report, released last week by the […]

September 25, 2023

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Warm ocean waters work their way into Puget Sound

Unusually warm waters in the Pacific Ocean — now pushing up against the Washington coast — are keeping oceanographers on alert for changes that could reverberate through the food web, potentially affecting fish, birds and marine mammals in coastal waters and in Puget Sound. Rising ocean temperatures may be related to recent sightings of warm-water […]

July 13, 2023

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Salish Sea Model tracks pollution, currents and climate change

This article is the latest in a series about computer models and their uses within the Puget Sound ecosystem. Today, we look at the Salish Sea Model, one of several models in the region helping to predict water circulation, water quality and food-web relationships. Read the full series: Where and how the water moves The […]

February 14, 2023

An aerial image of the lower Duwamish River as it flows into Puget Sound. The river is heavily contaminated with PCBs and other toxic chemicals. Photo courtesy of NOAA.">

Symposium grapples with long-lasting PCBs

Researchers at the Puget Sound Institute hosted a two-day symposium last month to share information about the science and management of PCBs in the environment. The online workshops, held January 24th and 25th, were organized by PSI researchers Andy James, Joel Baker, and Marielle Larson, in coordination with colleagues Will Hobbs (Washington State Department of […]


December 20, 2022

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The quest continues for a nutrient reduction plan

The quest continues for a large-scale plan to reduce human sources of nitrogen and improve the health of Puget Sound. This article is part of the Puget Sound Institute’s effort to explore the technical uncertainties related to the science of Puget Sound water quality. The project, jointly funded by King County and PSI, includes online […]

December 14, 2022

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A network of computer models is predicting the future of Puget Sound

A new $4.8 million dollar project led by the Puget Sound Institute links together a series of computer models to explore future scenarios across the watershed. Some of Puget Sound’s biggest concerns hold the greatest uncertainties.  Will we have clean water? Can the ecosystem sustain species like endangered salmon? How can the region continue to […]