ultraviolet index in Howe Key (South End, Harbor Channel) (2.2 mi.) | ultraviolet index in Big Torch Key (Harbor Channel) (2.3 mi.) | ultraviolet index in Knockemdown Key (North End) (2.9 mi.) | ultraviolet index in Water Keys (South End, Harbor Channel) (3 mi.) | ultraviolet index in Summerland Key (Niles Channel Bridge) (3 mi.) | ultraviolet index in Ramrod Key (Niles Channel Bridge) (3 mi.) | ultraviolet index in Big Pine Key (West Side, Pine Channel) (3 mi.) | ultraviolet index in Big Pine Key Ne (3 mi.) | ultraviolet index in Middle Torch Key (Torch Ramrod Channel) (4 mi.) | ultraviolet index in Big Pine Key (North End) (4 mi.) | ultraviolet index in Little Torch Key (Torch Channel) (4 mi.) | ultraviolet index in Summerland Key (Niles Channel South) (4 mi.) | ultraviolet index in Howe Key (Northwest End) (4 mi.) | ultraviolet index in Kemp Channel Viaduct (4 mi.) | ultraviolet index in Summerland Key (Southwest Side, Kemp Channel) (4 mi.) | ultraviolet index in Little Torch Key (4 mi.) | ultraviolet index in Raccoon Key (East Side) (4 mi.) | ultraviolet index in Ramrod Key (Newfound Harbor) (4 mi.) | ultraviolet index in Cudjoe Key (North End, Kemp Channel) (5 mi.) | ultraviolet index in Annette Key (North End, Big Spanish Channel) (5 mi.)