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