For more than 25 years, stormwater runoff has been implicated in the deaths of thousands of coho salmon in the Pacific Northwest. In 2021, researchers discovered that a common chemical found in tires – 6PPD was responsible and was toxic to many other species, including Brook Trout and Rainbow Trout. Hear from TU and our partners at the USGS on the latest science behind this problem and what we are doing to address it.