Toxic road runoff kills adult coho salmon in hours, study finds

10082015-cohoCPA 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. 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. In some place, like Longfellow Creek in West Seattle’s Delridge area, up to 90 percent of females were killed. “It was apparent that something coming out of those pipes was causing it,” Spromberg said. Read the rest here 22:21

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