DHInfrastructure was asked to advise on options for reforming the supply of urban services (water and sanitation services in particular) in Mongolia’s capital of Ulaanbaatar, in preparation for the ADB Policy and Advisory Technical Assistance (PATA) activity. The team advised on a range of institutional, legal, and regulatory changes, which included improvements to existing performance contracts between Ulaanbaatar and the water and sanitation providers, and steps required for the eventual implementation of a lease contract in the sector.