By 2020, all the emerging metro cities such as Kandy, Hambantota, Trincomalee, Dambulla, Jaffna, Galle, Gampaha, Kurunegala and Nuwara-Eliya as well as large township such as Vavuniya, Badulla, Matara, Anuradhapura and Ratnapura, which attract a substantial portion of the population and increase economic activities in coming years, will have centralized sewerage systems, which in turn will ensure environmental sustainability. The targets for these centralized sewerage systems will be;

Millennium Develoment Goals

The targets set by the MDG are;

• Access to adequate sanitation to 93% of population of Sri Lanka by 2015 and 100% by 2025
• Provide pipe-borne sewers in selected growth centers and major urban areas
• Acceptable on-site sanitation to those not connected to sewer systems