The topic of this master thesis is mostly negative human impact on speleological objects in Croatia, which is manifested through municipal and industrial pollution as well as wastewater. Since speleological objects in Croatia are located in karst areas that are extremely sensitive to pollution, we have every right to ask ourselves how we can stop it. In Croatia, more than 10% of the speleological objects that have been explored so far are polluted. There are several reasons why waste is dumped in speleological facilities, such as inadequate organization of waste collection from rural areas as well as environmental neglect. The consequences of pollution can be catastrophic for the flora and fauna that live and depend on speleological objects, but for humans the problem of water pollution is far more serious, since it is directly affected by waste in speleological objects. One of the solutions to this problem is to educate the population about the importance of speleological objects and to ban the access to these objects. It is necessary to harmonize the legislative framework with the real situation in the field and to define the importance of speleological objects as a public good in because of their importance for biodiversity and geodiversity as well as their influence on water resources. This thesis presents an example of an anthropogenic pollution of Đula - Medvedica cave system as well as potential ways of its remediation and protection.