ultraviolet index in Mad River Slough (Arcata Bay) (1.9 mi.) | ultraviolet index in Samoa (3 mi.) | ultraviolet index in Eureka Slough Bridge (3 mi.) | ultraviolet index in Eureka (4 mi.) | ultraviolet index in Bucksport (6 mi.) | ultraviolet index in Elk River Railroad Bridge (8 mi.) | ultraviolet index in North Spit (Humboldt Bay) (8 mi.) | ultraviolet index in Fields Landing (10 mi.) | ultraviolet index in Hookton Slough (13 mi.) | ultraviolet index in Trinidad Harbor (14 mi.) | ultraviolet index in Shelter Cove (57 mi.)