ultraviolet index in Orwood (Old River) (4 mi.) | ultraviolet index in Borden Highway Bridge (Middle River) (5 mi.) | ultraviolet index in Grant Line Canal (drawbridge) (8 mi.) | ultraviolet index in Holt (Whiskey Slough) (9 mi.) | ultraviolet index in Davis Slough (9 mi.) | ultraviolet index in Irish Landing (Sand Mound Slough) (10 mi.) | ultraviolet index in Blackslough Landing (11 mi.) | ultraviolet index in Wards Island (Little Connection Slough) (12 mi.) | ultraviolet index in Prisoners Point (12 mi.) | ultraviolet index in False River (13 mi.) | ultraviolet index in Borden Highway Bridge (San Joaquin River) (14 mi.) | ultraviolet index in Bishop Cut (Disappointment Slough) (14 mi.) | ultraviolet index in Threemile Slough Entrance (15 mi.) | ultraviolet index in Antioch (16 mi.) | ultraviolet index in Stockton (16 mi.) | ultraviolet index in Terminous (South Fork) (16 mi.) | ultraviolet index in Georgiana Slough Entrance (17 mi.) | ultraviolet index in Threemile Slough (17 mi.) | ultraviolet index in Rio Vista (19 mi.) | ultraviolet index in Pittsburg (New York Slough) (20 mi.)