By Lily Rothman and Liz Ronk | TIME Magazine
Lake Erie’s Sterling State Park had been dangerously polluted by septic-tank wastes for eight years when this photo was made in 1968, but—despite warning signs—the state of Michigan still permitted swimming. Alfred Eisenstaedt – The LIFE Picture Collection/Getty Images
In 1968, LIFE magazine dispatched photographer Alfred Eisenstaedt to the Great Lakes to capture a crisis that required no national awareness day to make itself known.
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