42     0204 Delaware
42     0205 The Susquehanna River Basin
42     0206 Upper Chesapeake
42     0207 Potomac
42     0411 Southern Lake Erie
42     0412 Eastern Lake Erie-Lake Erie
42     0413 Southwestern Lake Ontario
42     0501 The Allegheny River Basin
42     0502 The Monongahela River Basin
42     0503 The Ohio River Basin