Salmon Mercury
While there is truth in the fact that many fishes may contain mercury, the chances of getting salmon mercury poisoning are ridiculously low. In March 2004, the FDA and EPA put out an advisory that said pregnant women and young children should eat no more than two meals per week of low-mercury fish to avoid the outside chance of salmon mercury poisoning.
About Salmon Mercury Levels
Salmon mercury poisoning is extremely unlikely. The salmon mercury levels are actually some of the lowest of all fishes. You are more likely to get sick eating chicken than you are in getting sick from salmon mercury. Instead of worrying so much about salmon mercury levels, realize the health benefits they have always had.
There is still some debate about whether the salmon mercury levels are higher in wild or farm raised fish, but studies have shown that the levels in both are well below the safety standard. If you are really worried about salmon mercury levels, there are other fish that you should worry about much more such as swordfish, shark, and even albacore.