ProPublica and Oregon Public Broadcasting purchased 50 salmon from Native fishermen along a stretch of the Columbia River. The majority of the fish were fall Chinook salmon, with two coho salmon and one steelhead. Ten fish that were roughly the same size were placed in five coolers. The fish from each of these samples were combined to create a total of five composite samples. The samples were reduced to skin-on fillets and tested by ALS for 13 metals and two classes of chemicals. The lab returned an analytical report, as well as spreadsheets with the testing results.
Provided in collaboration with Oregon Public Broadcasting
