The project concerns water in the broad sense. The project is multipurpose. Tasks in the project are in the fields of mathematics, biology, chemistry, geography, foreign languages, environmental protection, ICT. The main goal is to draw public attention to the importance of water in everyday life. Due to the decreasing supply of drinking water, we would like to draw attention to the need for saving and rational use. To this end, we also want to involve local people from the school community, parents and the immediate surroundings.