Abstract
A sewage treatment plant is one of the essentials provided by the municipality to the society. A complete treatment of wastewater involves many unit operations and processes. Since the treatment of wastewater is a vital and continuous activity, the sewage treatment plant must be managed and functioned judiciously.

This paper deals with the use of GIS to expedite the concerned authorities at the treatment plant with the evaluation of the various treatment alternatives and processes considering the plant state, influent sewage conditions and various other influential factors.

A pilot project was undertaken involving development of package using AutoCAD Map 2000i (a GIS package) and VBA at Punjab Engineering College for a fictitious city of which the entire wastewater collection system and the Sewage Treatment Plant was evaluated for optimal treatment scheme for changing conditions. In addition, the package functions as an information system for the complete Sewage Treatment Plant and the Sewage Collection System.