ABSTRACT
G8 and other adjoining areas. According to this survey and field data from public service departments like Capital Development Authority (CDA) and Water and Sanitation Authority (WASA), Islamabad, more than 90 percent of sewage disposal in the city is comprised of Septic Tanks and soakage pits. These septic tanks and soakage pits are ultimately linked with trunk sewers and the finally bluck of sludge is thrown into the only renowned Nullah Laie. Unlike these areas, these are two famous towns Shahzad Town and Alipur Farash Town in Islamabad where two bio filter STPs have successfully been installed. The sludge profile of these two towns is.
