Abstract: The present disclosure provides a geographic information system (GIS) based centralized carbon footprint monitoring system (CFMS) that can monitor carbon footprint related to geographically distribute power consuming sites that meet their power requirement from multiplicity of power sources. The disclosure provides for real time monitoring of source of electric power among to a particular power consuming site. The captured power source status is periodically communicated to a Centralized Processing System configured to store the data and generate statistical reports relating to carbon footprint of these sites. The statistical reports are prepared by a web application built on top of the Centralized Processing System. Further, to provide a better comprehensibility of the information, the carbon footprint of the power consuming sites for a given period for a desired geographical region is displayed by means of Thematic Maps that are based on Geographic Information System (GIS) of Survey of India.