The water supply in the village of Pátka is currently provided by two water produced by its own deep-drilled well. Water produced and supplied by Pátka’s water plant does not meet the water quality requirements of Government Decree 201/2011 (X.25.). Catch parameters of water delivered to consumers: iron, manganese, arsenic and ammonium ion. Opinion No 6817/2009 issued by the National Institute of Environmental Health (ICC) No. 6817/2009, as well as the Principal Water Law Licence No 35700/941-6/2016 of the Department of Disaster Management of the Deputy Directors of the Directorate for Disaster Management of Fejér County are attached as proof of inadequate water quality. The proper supply of drinking water to the settlement can be achieved by treating the stratum water produced by the municipal waterworks according to the following operations: — oxidation, — coagulation, flocculation, adsorption, — phase separation through a rapid filter, chlorine oxidation and activated carbon filtration. In addition to the construction of water treatment, it is necessary to carry out the reconstruction and development of outdated water network elements, but the amount of the recreation of the drinking water network to be declared does not exceed 20 % of the eligible costs. The planned investment will take place in the municipality of Pátka.