The Ravi  rises in Kulu, flows westward through a triangle formed by the junction of the Pirpanjal and Dhaola Dhar ranges. It entres Punjab plains near Madhopur and later enters Pakistan 26 kms below Amritsar. Catchment area is only 14,442 sq km. The water quality in the river is comparatively clean along its entire length since is little human activity around it and it remains ‘B’ throughout the year. There is only one sampling station on this river.