The Pirai River flows through Kheri and Sitapur districts of Uttar Pradesh stare in India.[1]
It rises in depressions near Khamaria village near Kasta town and flows south-east to form boundary between Sitpur and Kheri district. After crossing the north-eastern border of pargana Maholi, it has a very winding course. It then flows through the pargana of Sitapur to join the Sarayan on its right, a short distance below Sitapur city.[1] It is the only tributary of Sarayan river.
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