You are here: Home Environment Pollution Stormwater Runoff Kills Coho Salmon Stormwater Runoff Kills Coho Salmon Coho salmon in urban streams are dying before they can spawn due to pollution from stormwater runoff. by Heather Carr January 25, 2013, 2:00 am 2 Comments Coho salmon in urban streams are dying before they can spawn due to pollution from stormwater runoff. The salmon returning to spawn in Seattle creeks died soon after storms wash dust and pollutants from roads into the water. NOAA performed experiments at a hatchery comparing juvenile salmon in runoff water collected directly from a highway and that same water after it had been filtered through soil. The runoff collected from the highway killed the salmon in less than twelve hours, while the salmon in the soil-filtered water showed no ill effects. The team checked for contaminants commonly known to kill fish, but didn’t find the usual culprits. Right now, it’s still a mystery as to what is in the runoff that is causing the deaths. Salmon contribute over $1 billion each year to the economy in Washington state. Finding out what kills them is of economic importance to many people. In the meantime, the experiments already done by NOAA show that rain gardens and other methods to slow the runoff of storm water into creeks can save fish. The video below details the experiments and what has been found. Storm drain photo via Shutterstock See more Previous article Annie’s Recalls Rising Crust Frozen Pizzas Next article Science, Sustainability, World Hunger, and GMOs: A Skeptic’s Rebuttal 2 Pings & Trackbacks Pingback:Hybrid Grass Reduces Flooding While Providing Forage Pingback:Hybrid Grass Reduces Flooding While Providing Forage • Insteading Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Upload a photo / attachment to this comment (PNG, JPG, GIF - 6 MB Max File Size): (Allowed file types: jpg, gif, png, maximum file size: 6MB.