To rationalize and improve the sewage treatment services in the Cheras - Kajang Basin, Selangor, with the catchment area of ​​60.9 square km.

Rationalizing 164 existing small sewage treatment plants in Cheras Batu 11, Desa Baiduri, Cheras Jaya, Selangor Kajang 1 & Kajang 3 with a system that is more efficient and environmentally friendly.

To improve the quality of treated wastewater and reduce the sources of pollution to Sungai Langat, primarily from the release of ammonia and industrial effluent from Sewage Treatment Plant (STP) that is not fully treated.