ultraviolet index in Hookton Slough (2.5 mi.) | ultraviolet index in Elk River Railroad Bridge (2.7 mi.) | ultraviolet index in North Spit (Humboldt Bay) (3.0 mi.) | ultraviolet index in Bucksport (4 mi.) | ultraviolet index in Eureka (6 mi.) | ultraviolet index in Eureka Slough Bridge (7 mi.) | ultraviolet index in Samoa (8 mi.) | ultraviolet index in Arcata Wharf (10 mi.) | ultraviolet index in Mad River Slough (Arcata Bay) (10 mi.) | ultraviolet index in Trinidad Harbor (23 mi.) | ultraviolet index in Shelter Cove (49 mi.)