Greater Colombo Wastewater Management Project

The Ministry of Local Government and Provincial Council commenced the Greater Colombo Waste Water Management Project (GCWMP) in 2010. The GCWMP is planned to improve the wastewater management services those are delivered to the urban and suburban residents of Colombo. The project is targets to serve approximately 838,000 people through an improved wastewater management service, and the project will improve the living environment of 2.5 million people of Colombo.

The project is designed to:

  • upgrade the sewerage infrastructure
  • strengthen institutional and operational capacity
  • support the project management and implementation

The existing sewerage system of Colombo Municipal Council area has been laid in 1925. The sewerage systems of Kolonnawa Municipal Council and Dehiwala-Mount Lavinia Municipal Council were laid during 1983-87. These sewerage systems have served the city for decades with minimum maintenance and without any significant upgrade.

The GCWMP is designed to improve the sewerage system of Greater Colombo to “cater to the long-term and growing demand in the cities through schemes with economic scale”.

Expected benefits of the project:

  • Improved wastewater management services, better urban environment.
  • Better public health including living conditions for residents in the Colombo City and suburbs,
  • Improved marine and inland water quality

The Asian Development Bank and the Government of Sri Lanka jointly finance the project.

Source: Colombo Municipal Council (

For more information, visit:

Colombo Municipal Council (

Ministry of Local Government and Provincial Council, Sri Lanka (