This paper presents a Life Cycle Assessment analysis of combustion of municipal waste in an incinerator plant. The study was performed for a city with a population of 250 thousand over a one year period. Research included examinations of waste collection, transportation, combustion, and utilization residues after combustion. The collection stage included emissions from the production of containers necessary for the waste collection. The stage of transportation included emissions from diesel combustion in the engines of vehicles carrying waste to the incineration plant. Afterwards, the waste was segregated at the incineration plant, and the non-recyleable remainder from sorted municipal waste were then directed for incineration. It is assumed that the combustion takes place in a grate furnace. Combustible components are transformed into flue gas, and minerals into slag and ash. Flue gas was cleaned in an installation with a variety of equipment including an electrostatic precipitator for dedusting of exhaust gases, a scrubber for acidic flue gas and heavy metals separation, a scrubber for neutralization of SO2, a filter with a coke absorber, and a Selective Catalytic Reduction (SCR) for denitrification. The incineration plant produced electricity and heating. The analysis included recovery of metals from the slag. The remaining material which can be used is consigned for road construction, while the rest goes to landfill. Fly ash and solid residues from the cleaning of flue gas are directed to a hazardous materials landfill. The analysis was conducted using the CML2001 method. The study considered categories of mineral resources depletion, global warming, toxicity to humans, photochemical oxidation, acidification, and eutrophication. All obligatory elements were taken into account in addition to normalization and weighting of optional elements. The results are discussed and compared to existing documentation of indicators for biomass.