Expedient water use is crucial for increasing the production capacity of animal husbandry and crop production, especially, since freshwater is an exhaustible natural resource for humanity. Increasing water demand, application of resource-efficient technologies, and acceptance of recycling treated water all have become determining factors. Water footprint was developed to compare water use of different sectors, and to provide a clearer picture about real water use and water consumption. The water footprint of animal husbandry is a comprehensive indicator assessing blue, green, and grey waters on the farm level in both qualitative and quantitative ways. Water footprint indicator has become important in more and more countries to ensure sustainable production by assessing the economic, environmental, and social aspects of a given country. However, other factors such as chosen breed, herd size, keeping, drinking, feeding, and milking technology, the storage capacity of wastewater, and managerial decisions all impact water management and recycling opportunities of wastewater. The water use and consumption of the most common dairy parlor types in Hungary and related wastewater treatment and recycling opportunities were investigated in my research. Usva et al (2013) analyzed water use of traditional pipeline tied milking systems, untied milking parlor, and milking robot. Based on their findings, there is no significant difference between water use of various milking technologies and feeding practices. Thus, the main question in my research was whether there is a significant difference between water use and the water footprint of various milking technologies. Furthermore, if there is an opportunity to provide practical data, information, and recommendation for dairy farms to optimize the water footprint of milking, which is the most water-demanding workflow in a dairy farm. Various types of milking parlors and milking technologies are applied in dairy farming. Three types of milking parlors were assessed in this research: a traditional, fishbone milking parlor- FarmHLSZ (2 milkings and teat washing daily), a robotic milking system- FarmROB, which is not that common in Hungary, but has been in focus lately, and a polygon milking parlor- FarmPOL (3 daily milkings, no teat washing), which is less common, but still typical in South-east part of Hungary. Firstly, blue, and grey water use and associated water footprint of investigated farms were calculated. Data for calculation were taken from RISKA farm monitoring software and based on information from farm managers and other employees, and their measurements. The drinking water consumption of lactating cows (DWC; L/day) was calculated using the equation of Meyer et al. (2004). The water consumption of investigated farms was compared by variance analysis. The correlation between blue water use of actual and fat and protein-corrected milk was assessed by regression analysis. Correlations between service water use of different categories associated with milking, and between blue water footprints were assessed by multiple t-test statistical analysis. The water footprint associated with milking parlors was highlighted from elements determining water use and consumption of animal husbandry. It was supposed that milking technology and practice influence the value of water footprint. The effectiveness of different treatments for cleaning wastewater of different types of milking parlors was investigated too. Flocculation, centrifugation, Fenton oxidation, ozonization, microfiltration, and ultrafiltration treatments were used for water purification. Daily drinking water consumption of lactating cows was different considering the three investigated farms. The highest drinking water consumption 103.4 L/cow was reached on FarmPOL. Drinking water consumption of FarmHLSZ was 15.6 L higher and in the case of FarmROB, it was 6.3 L less than that of FarmPOL, which were statistically significant differences (P