Bay of Saint Louis | |
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Location | Southwest coast of Mississippi |
Coordinates | 30°20′49″N 89°19′01″W / 30.347°N 89.317°WCoordinates: 30°20′49″N 89°19′01″W / 30.347°N 89.317°W |
Type | Estuary |
River sources |
Jourdan River Wolf River |
Basin countries | United States |
Average depth | 1.5 m (4 ft 11 in) |
Salinity | <20 (average) |
Settlements |
Pass Christian Bay St. Louis Diamondhead |
The Bay of Saint Louis (Bay of St. Louis, St. Louis Bay) is a shallow-water, partially enclosed estuary of the northeast Gulf of Mexico along the southwestern coast of Mississippi. The estuary receives freshwater input from two blackwater, or swamp-land, tributaries of the Mississippi River, the Jourdan River on the west and the Wolf River on the east and some smaller streams (Bayou Portage); these are mixed in the bay with salt water from Mississippi Sound and the Mississippi Bight. The waters are comparatively well mixed, with an average salinity of less than 20.United States Environmental Protection Agency due