Pegu is separated from the Toungoo District on the north by the Kun stream, which rises in the Yomas and flows east into the Sitting River, and on the east from the Toungoo and Thaton Districts by the Sittang, down to its debouchment into the Gulf of Mariaban. The Sittang has recently made a new cut at Alok, * the piece of Thaton District cut off will probably be transferred to Pegu. On the south it is separated from the Hanthawaddy district by an irregular line westwards from the Gulf of Mariaban to the junction of the Kawet Chaung and Pegu River.