A new study shows that stormwater runoff from urban roadways is so toxic to coho salmon that it can kill adult fish in as little as 2½ hours.
But the research by Seattle scientists also points to a relatively easy fix: Filtration through a simple, soil-based system.
“It’s basically … letting the Earth do what it does so well, what it has done for eons: cleaning things up,” said Julann Spromberg, a toxicologist for the National Oceanic and Atmospheric Administration and co-author of the report published Thursday in the Journal of Applied Ecology.
Scientists have long suspected that the mixture of oil, heavy metals and grime that washes off highways and roads can be poisonous to coho, but the study is the first to prove it.
See the full story and video published in The Seattle Times.