Development of the existing sanitary sewage treatment plant in Partynia with a single-chamber reinforced concrete tank averaging with partitions. It will be connected to the existing plant control system. Changing the use of the old sewage treatment plant in Radomyśl Wielki to a storage tank of 300 m³ will consist of changing its use – from the former biological reactor there will be a reinforced concrete tank collecting sewage, cyclically emptied with their transport with a discharge pipeline to the sewage treatment plant in Partni. The scope of works includes adjustment works, installation works, teletechnics and photovoltaics, connected to an internal electrical system. The control of technological processes will be coupled with the main computer located on the treatment plant in Partni. Construction of sanitary sewage system with pumping stations, pressing pipelines, power supplies with a total length of 31 866.7 mb i.e. the main network – 20 665 mb, the distribution network 11201.7 m. and the construction of 3 sewage treatment plants. The main objective of the project is to organise waste water management in Radomyśl Wielki by building a new sanitary sewer system and expanding the existing sewage treatment plant and building new treatment plants. The general objective of the project is to strengthen economic and social cohesion in the area of the investment, improve the state of the environment, clean water and soil and adapt the sewage economy of Radomyśl Wielki commune to the requirements of Poland and the European Union. According to the RPOWP for the period 2014-2020, the objective of Sub-measure 4.3.1 in the area of waste water management in agglomerations will be an increased proportion of the population using the sewage treatment system, which will be achieved by completing the construction of sewage management systems in agglomerations and the extension and repair of defective sewage management systems. Ineligible expenditure is VAT and a network of 5466.70 m and 3 treatment plants.