http://articles.mercola.com/sites/articles/archive/2006/07/25/mercury-levels-higher-in-some-imported-tuna.aspxThe environmental group Defenders of Wildlife have found that many imported cans of tuna have mercury levels higher than the U.S. federal safety limit. The highest levels of mercury were found in tuna from Ecuador and Mexico . Exceeding the Limit DefendersenCommunityServer 2008.5 SP1 (Build: 31106.3070)