All Articles
Untangling chemical names and looking back over 200 years of 6PPD-quinone history
The tire chemical 6PPD is known worldwide for its deadly effect on salmon, but it also has a complex history. We look at how this history connects to important breakthroughs in modern transportation and medicine and how the unique chemical structure of 6PPD makes it an environmental hazard.
Synthesis of the Shore Friendly Program (2019-2025)
This report describes and analyzes the first six years (2019-2025) of Shore Friendly as an established program within the Washington Department of Fish and Wildlife.
The 2026-2030 Action Agenda for Puget Sound
The 2026-2030 Action Agenda was approved by the Puget Sound Partnership's Leadership Council on June 3rd, 2026. After adopting the plan, the Leadership Council submitted it to the EPA and requested that the Action Agenda be approved as the Comprehensive Conservation Management Plan for the Puget Sound National Estuary Program.
Shore Friendly: A developmental evaluation
Shoreline modification is pervasive in the Puget Sound region and the use of physical structures to curtail erosion, known as armoring, degrades ecosystems and reduces salmonid forage opportunities. Shore Friendly, a program of the Washington Department of Fish and Wildlife, supports waterfront stewardship on private lands through technical assistance and financial incentive programs that promote
Northern right whale dolphins in the Salish Sea
Overview
The northern right whale dolphin (Lissodelphis borealis) is one of the most unusual marine mammals of the North Pacific Ocean. It is the only dolphin species in the Northern Hemisphere with no hint of a dorsal fin, and it is very slender and streamlined, making it appear almost eel-like. Northern right whale dolphins are found only in cool temperate waters of the North Pacific and are
Tire companies race to replace deadly tire chemical
A chemical found in tires is leading to the deaths of untold numbers of coho salmon in Puget Sound every year. Chemical companies are searching for an alternative but say the unique chemistry and function of 6PPD are major challenges. This article is part one of a three-part series.
State and federal governments address 6PPD problem
Formal legal processes are underway in Washington and California to seek alternatives to the highly toxic chemical in tires. We continue with part two of our three-part series on efforts to find a replacement for 6PPD.
Players in the race for 6PPD alternatives
With a worldwide market valuation somewhere around $1 billion a year for the single chemical 6PPD, tire companies and their chemical suppliers are working overtime to find a safe and effective replacement for the tire additive. The financial stakes are enormous, since virtually every tire on the market today contains 6PPD.
“The environmental concerns surrounding 6PPD have spurred significant R&D
A spatial assessment of risks and threats to eelgrass and canopy kelp in Puget Sound
A 2026 report assesses region-wide cumulative risks for eelgrass and kelp in Puget Sound, identifying hotspots of concern, the relative threats, and projected future risks across eight marine subregions.