Reason number 1,476 not to eat farm raised salmon.
The Pew Environment Group recently acquired documents from the U.S.
Food and Drug Administration (FDA) revealing that three Chilean salmon
farming companies, including the two largest producers of farmed
salmon, used a number of drugs not approved by the U.S. government.
These chemicals include the antibiotics flumequine and oxolinic acid
and the pesticide emamectin benzoate. The documents further show that
the farmed salmon containing residues of unapproved chemicals were
destined for the U.S. market.
Chile is the primary source of farmed salmon consumed in the United States. LINK