Despite economic growth and rapid urbanization in recent years, the sewerage system in Kandy City has not kept pace. Wastewater from households, many business places and service institutions is discharged directly to the river or the streams or the lake without adequate treatment As a result, the water quality of Mahaweli River, the main source of drinking water supply to the city and the surrounding areas, and the iconic Kandy Lake suffer severe deterioration. Public demand for a proper wastewater management system has been growing for some time.

Project Intervention
The Government of Sri Lanka obtained support from the Government of Japan to enhance institutional capacity – both at the national level and the local government level – to deliver wastewater management service needs more effectively and responsively. Accordingly, during 2014 through 2017 the National Water Supply and Drainage Board (NWSDB) and the Kandy Municipal Council (KMC) will jointly implement Kandy City Wastewater Management Project (KCWMP) to facilitate the design and construction of a modern wastewater treatment plant and treated effluent disposal system that will lead to an improvement in the water quality particularly of Mahaweli River and Kandy Lake.

This facility will collect and treat wastewater from 55,000 residents living in 9147 housing units and 2997 business and other service institutions.

Project Development Objectives

Through the installation and operation of a centralized sewage collection and chemical-free, modern sewage treatment system the Government of Sri Lanka aims to enhance human wellbeing and environmental quality.

  • Enhance human wellbeing and environmental quality
  • Improve water quality of Mahaweli River, Kandy Lake and other sources

The objective of the project is to improve the water quality of the lake, river/streams in Kandy city and to improve sanitary conditions of the people in high density areas.

Scope of work

  • To construct a centralized wastewater collection system
  • To connect 9,147 domestic sources and 2,997 non-domestic sources of wastewater generation to the central system
  • To construct a common wastewater treatment plant that uses chemical-free modern technology that is efficient and easy to operate and maintain (propeller-type oxidation ditch system)
  • To construct one public bathing place anew and repair four existing bathing places
  • To construct 512 individual sanitation facilities for low income households with community participation
  • To rehabilitate 12 public sanitation facilities


Project Components

  • Wastewater Treatment Plant at Polwatte (Gannoruwa) with capacity of 14,000 cubic meters/day)
  • Treated wastewater sludge drying facility at Gohagoda (Katugastota)
  • Main Pump Station (at William Gopallawa Mawatha) and 12 other Manhole Pump Stations
  • 225 km property connection sewers
  • 93 km Main sewer consisting of 9 Trunk Sewers, 82 Branch Sewers, and 4 Force Main sewers
  • Sanitation and Bathing Units for low income groups
    • 512 Private sanitation facilities (new constructions)
    • 12 Public sanitations facilities (rehabilitated)
    • 4 Public bathing places (rehabilitated)
    • Public bathing place (new construction)