Landfill in Wola Suchożebrska accepts waste from the area of Siedlce and few neighbouring municipalities. A strict monitoring has been carried out on the landfill since 2007. The objective of the research was to analyse the amount and the morphological composition of municipal waste in the landfill in Wola Suchożebrska and on this basis to assess the efficiency of actions related to limitation of waste. Segregation of waste in the landfill caused that despite the increase of the total weight of waste a storage weight has not increased and even it decreased. Efficiency of undertaken activities was often limited due to the reasons not depending on the persons who manage the landfill. Changes in the structure of waste do not allow careful planning of future use, however, an increasing participation of plant waste makes a composting process more popular.