Code Category ALU AQU FCU PCU PFPWS. Lake Michigan Nearshore IL_QLM-01 0404000205 5 F TP Aldrin, Dieldrin, Endrin, Heptachlor, Hg, Mirex, PCBs, Toxaphene F F. Lake Michigan Harbors Water Body Name Assessment Unit ID Hydrologic Unit Code Category ALU AQU FCU PCU PFPWS. 31st Street Harbor IL_QZX 0404000205 2 F F X F