The increase in tourist traffic, related to the local and global development, increased availability of tourist-attractive areas causes noticeable environmental changes. Tourist areas with increasing popularity, are mountain areas. The emergence of new tourist facilities such as mountain huts, hotels, tourist shelters is related to providing users staying in them with access to technical infrastructure, mainly related to access to water. The increasing number of tourists using accommodation objects results in pollution discharged to the environment resulting from intensive use of local water intakes. One of the still unresolved problems is the formation and subsequent treatment of wastewater in mountain areas. This paper presents an attempt to characterize the impact of tourist traffic and related water and wastewater infrastructure on the direction of changes in areas with intense tourist traffic. The research area included objects located directly in the Karkonosze National Park inscribed on the list of UNESCO biosphere reserves and in the protection area of Natura 2000, which is annually visited by over 3 million tourists. The solutions used for wastewater treatment were mostly local wastewater treatment plants (mechanically-biological) with discharge to the ground or to surface water receiver. The conducted research concerned an in-depth analysis of the functioning of mountain tourist shelters in the analyzed area. The studies concerned the analysis of legal conditions and applicable regulations, as well as the ownership structure of the analyzed objects, and the resulting problems, including the lack of investment in the modernization and renovation of outdated water and wastewater systems by tenants. The analyzes carried out showed intensive water intake from own intakes in the protected area, along with the discharge of treated wastewater into watercourses with low flows in a source part of catchments. Intense tourist traffic generates unsteady wastewater inflows to the treatment plant and limits their proper functioning in the absence of constant monitoring of the inflow volume.