In this paper, a project for sanitary wastewater and stormwater of the settlement of Artatore, located on the island of Lošinj, is designed. Data from the spatial planning documentation and the Lošinj tourist board were used. In the introduction, topographic, climatic and geological characteristics of the settlement are described. Based on the existing state and the planned state according to the spatial planning documentation, the separate sewage system was chosen. Then the characteristics of the technical elements of the sewage network are described in more detail. Modelling of elements of the sewage network and the calculation of the flow and hydraulic calculation was done with the help of the Urbano Canalis 10 software package from StudioARS d.o.o. The hydraulic and static calculation of the collector as well as the calculation of the pumps are described in more detail. Taking into account the necessary work, material and transportation of materials, an approximate bill of quantities was made. In the final part, graphic attachments are presented that include the layout of the sewage, the longitudinal profiles of the collectors, the characteristic cross-section of the trench, as well as the details of the inspection and cascade shaft and the pumping station.