Canned Chunk Light Tuna This kind is 0.12 parts per million of mercury -- the albacore is the worse one at 0.32 parts per million of mercury. The methylmercury in these species is generally less than 0.2 ppm, and few people eat more than the suggested weekly limit of fish (i.e., 2.2 pounds)." -CDC *2.2 pound of fish is almost 6 can of tuna. Later on in the report, the CDC states that a person can chronically (for >365 days) ingest .0003mg/kg of mercury per day with "no observed adverse effect." For a 200 lb. man, this would be a little over 1 can of chunk light tuna each day. Would 2 cans a day at 210lbs would be THAT bad?