Багмати
The Bagmati River contains large amounts of untreated sewage, and large levels of pollution of the river exist due primarily to the region's large population. Many residents in Kathmandu empty personal garbage and waste into the river. In particular the Hanumante khola, Dhobi khola, Tukucha khola and Bishnumati khola are the most polluted. Attempts are being made to monitor the Bagmati River system and restore its cleanliness. These include "pollution loads modification, flow augmentation and placement of weirs at critical locations".