indice ultravioletti a Annisquam (5 mi.) | indice ultravioletti a Plum Island South (5 mi.) | indice ultravioletti a Gloucester Harbor (6 mi.) | indice ultravioletti a Rockport (8 mi.) | indice ultravioletti a Salem (9 mi.) | indice ultravioletti a Plum Island (Merrimack River Entrance) (13 mi.) | indice ultravioletti a Newburyport (14 mi.) | indice ultravioletti a Lynn (15 mi.) | indice ultravioletti a Salisbury Point (16 mi.) | indice ultravioletti a Merrimacport (17 mi.) | indice ultravioletti a Riverside (Haverhill) (17 mi.) | indice ultravioletti a Hampton Harbor (18 mi.) | indice ultravioletti a Chelsea (21 mi.) | indice ultravioletti a Deer Island (South End) (22 mi.) | indice ultravioletti a Boston Light (22 mi.) | indice ultravioletti a Amelia Earhart Dam (Mystic River) (22 mi.) | indice ultravioletti a Charlestown (Charles River Entrance) (23 mi.) | indice ultravioletti a Boston (24 mi.) | indice ultravioletti a Hull (24 mi.) | indice ultravioletti a Moon Head (25 mi.)