The purpose of the rule is to adopt Total Maximum Daily Loads (TMDLs) and their allocations for the impaired water segments that drain into the St. Lucie Estuary, including the following Water Body Identifications (WBID): St. Lucie River Lower and Middle Estuary (3193), the North Fork St. Lucie River (3194), the North St. Lucie Estuary (3194B), the C-24 Canal (3197), the C-23 Canal (3200), the South St. Lucie Estuary (3210), the South Fork St. Lucie River (3210A), Bessey Creek (3211), and the C-44 Canal (3218).