The Lummi Natural Resources Department are reporting 11 dead Chinook salmon smolts and more than a 100 dead pink and chum salmon found in a smolt trap at Hovander Park in Ferndale.
The Bellingham Herald reported the dead fish were found at midday Tuesday. The same trap was fine that morning.
Officials believe the die-off may have been caused by a spill or the dumping of chemicals into the river. Tests found a higher acidity level in the water and scientists observed the scent of juniper or an evergreen chemical cleaner nearby.
Water samples and fish carcasses have been sent for laboratory analysis.
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