Lake Onondaga, near Syracuse, New York, went though the same ordeal that Lake Erie did, being a dumping ground for various factories. My dad used to sail his canoe there back in the 1930s, but it became too toxic for any contact with the water. I hear that it's recovered to the point where fishing is allowed again, but I don't know if it's safe for swimming now. The Onondaga Nation has been battling the state for years for jurisdiction of the lake, which the Haudenosaunee nations have always considered sacred.