ultraviolet index in Knockemdown Key (North End) (1.9 mi.) | ultraviolet index in Water Keys (South End, Harbor Channel) (2.1 mi.) | ultraviolet index in Big Torch Key (Harbor Channel) (2.5 mi.) | ultraviolet index in Cudjoe Key (North End, Kemp Channel) (3 mi.) | ultraviolet index in Content Keys (Content Passage) (3 mi.) | ultraviolet index in Howe Key (Northwest End) (4 mi.) | ultraviolet index in Big Torch Key (Niles Channel) (4 mi.) | ultraviolet index in Howe Key (South End, Harbor Channel) (5 mi.) | ultraviolet index in Sawyer Key (Outside, Cudjoe Channel) (5 mi.) | ultraviolet index in Sawyer Key (Inside, Cudjoe Channel) (5 mi.) | ultraviolet index in Pumpkin Key (Bow Channel) (5 mi.) | ultraviolet index in Big Spanish Key (6 mi.) | ultraviolet index in Big Pine Key (North End) (6 mi.) | ultraviolet index in Sugarloaf Key (North End, Bow Channel) (6 mi.) | ultraviolet index in Kemp Channel Viaduct (6 mi.) | ultraviolet index in Cudjoe Key (Cudjoe Bay) (6 mi.) | ultraviolet index in Sugarloaf Key (Northeast Side, Bow Channel) (6 mi.) | ultraviolet index in Cudjoe Key (Pirates Cove) (6 mi.) | ultraviolet index in Annette Key (North End, Big Spanish Channel) (6 mi.) | ultraviolet index in Big Pine Key Ne (6 mi.)