** New limit set for tire chemical that kills coho salmon

Washington state is leading the way by setting a numeric limit on 6PPD-quinone, a chemical linked to the decline of coho salmon, at 0. 012 micrograms per liter. This decision by the state Department of Ecology marks a pivotal moment in environmental regulation and is part of a larger effort to combat over 20 toxic chemicals threatening marine and freshwater ecosystems. Bryson Finch, a toxicologist for the Department, stated that this initiative represents a significant step forward in understanding and mitigating the harm caused by such pollutants. The new limit will take effect on September 14, pending EPA approval, highlighting the urgency of addressing this environmental issue.

Local advocates are also engaged in tire removal from rivers, contributing to the reduction of 6PPD runoff. The health of salmon populations is vital for biodiversity and the cultural and dietary needs of local tribes and marine wildlife, illustrating a community-focused response to environmental challenges.