ultraviolet index in North Spit (Humboldt Bay) (1.2 mi.) | ultraviolet index in Elk River Railroad Bridge (1.6 mi.) | ultraviolet index in Eureka (2.5 mi.) | ultraviolet index in Eureka Slough Bridge (3 mi.) | ultraviolet index in Samoa (4 mi.) | ultraviolet index in Fields Landing (4 mi.) | ultraviolet index in Mad River Slough (Arcata Bay) (6 mi.) | ultraviolet index in Hookton Slough (6 mi.) | ultraviolet index in Arcata Wharf (6 mi.) | ultraviolet index in Trinidad Harbor (19 mi.) | ultraviolet index in Shelter Cove (53 mi.)