Some consumer groups are working to convince the U.S. Department of Agriculture to remove tuna from school cafeterias after a study found variable levels, sometimes higher than those allowed by Federal guidelines, of mercury in cans of the fish.
The Mercury Policy Project tested 59 samples of tuna in large cans and foil pouches from 11 States. Levels of methylmercury found were close to previous tests done by the Food and Drug Administration for the most part.
