8. Lake Erie
Lake Erie is the second-most dangerous Great Lake in terms of sudden drowning by currents — about 2 deaths per year, compared with about 6 for Lake Michigan. But Lake Erie also has a huge algae problem, causing both a large “dead zone” where no fish can survive and a drinking-water crisis in Toledo that’s made national news. Eleven million people rely on Lake Erie for drinking water, the most of any of the 11 deadliest lakes in the United States.