The project WWTreat Waste Water (Waste Water Treatment Improvement and Efficiency in Small Communities), is a part of the Programme LIFE of the European Commission. Being developed in the area of environment protection, it aims to achieve monitoring and control of the whole process of treating waste water, making the process more efficient, to solve the problems of RWTS (Residual Water Treatment Station) maintenance and operation, and to provide decision-support resources for the control centre by introduction of electronic information systems at the RWTS and MWSS (Municipal Water and Sanitation Services) structural levels. The pilot project will be implemented in three RWTS in the Sintra district under coordination of MWSS of Sintra.