Welcome to LAKE IOSCO.COM The lake Iosco (Shimmering Waters) community is located in Bloomingdale, NJ, nestled between the Wanaque Reservoir, Norvin Green State Forest, Glenwild Lake, Morse Lakes and Rainbow Lake. The lake was flooded by the construction of 2 dams and 1 core-wall in 192_. Forty three homes line the shores of more then 2 miles of lakefront. More Lake Iosco Information Lake Iosco ...