The master thesis presents a conceptual solution of the constructed wetland for wastewater treatment in the area of the municipality of Popovac. The introductory part of the work defines basic characteristics of drainage, collection and wastewater treatment and basic characteristics of the vegetation plant. Analysis of basic characteristics describes their scope, processes purification occurring, filter materials used and vegetation planted for more efficient wastewater treatment. Based on wastewater amount inlet, all types of plant devices and their characteristics are described. When designing the conceptual solution, the valid spatial planning documentation was respected where guidelines for drafting documentation projects are defined, regarding the location of the wastewater treatment plant and the discharge of purified water. The Popovac municipality spatial plan includes two variants of possible drainage and purification solutions. The first variant solution implies drainage by individual settlements with the construction of individual plant devices in the settlements of Popovac, Kneževo and Branjina. The second variant solution includes construction of a central plant in the village of Popovac, where waste water will be collected in the settlements of Baranja and Kneževo transport pipeline leading to the device. The work includes analysis of locations, scope of the project and technical description, at the level of conceptual design, describing the main parts of the purification plant waste water. The conceptual solution defines basic technological parameters of the plant device for both variants and the dimensioning of the septic tank, pumping stations, automatic rough grates and the dimensions of the swamp pool. Construction costs were estimated for both variant solutions and according to those estimates it is concluded which variant is more financially profitable.