General Assembly of the United Nations in 1992 set the date 22. March for International Water Day, reminding us of the importance of water resources every year for over three decades. The resolution to raise awareness about the problem of the lack of drinking water, quality and hygiene requirements, as well as the need to protect resources was passed in Rio de Janeiro, Brazil, within the framework of Agenda 21. The date does not only have a symbolic meaning, individual factions of the United Nations and non-governmental organizations determine each year specific themes in which the International Water Day is carried. In the context of these topics, various studies are being developed, which make it possible to look at the importance of water resources from several angles. This year's theme is called "Accelerated Change", which is a message for each of us as every change requires an individual approach.