Particulate matter (PM) include a wide range of substances of different chemical composition and sizes that are carried by air in the form of solid or liquid fractions. PM reach ambient air through natural processes or human activity (e.g. fire, burning of fossil fuels). Over the past few decades, more attention is focussed to the health aspects of increased concentrations of PM in the ambient air. The association of PM with premature death, exacerbation of asthma, reduced lung function and cardiovascular diseases has been established. PM are divided into two main fractions based on aerodynamic diameter: PM10 and PM2,5. Particles with a larger diameter (PM10) tend to stay in the lungs, while PM2,5 can penetrate the lung barrier, enter the blood stream and cause cardiovascular diseases. Waste Management Centers (WMC) are designed to reduce the emission of landfill gases into the atmosphere. WMC Marišćina is the first Center built in the Republic of Croatia and represents the central figure of the integral waste management system in the Primorsko-goranska County. The aim of this scientific Paper was to examine the influence of WMC Marišćina on the concentration of particulate matter in diverse fractions and to determine the air quality in the surroundings of the Center. It was established that the impact of WMC Marišćina on the concentration of particulate matter during 2021 was not significant, the legally prescribed values of PM10 and PM2,5 concentrations were not exceeded. Based on the measured values of the concentration of particulate matter, air quality in the surroundings of the Center is classified in the first category. Although no significant impact of WMC Marišćina on air quality in 2021 has been determined, continuous monitoring of pollutants in the air is necessary for a timely reaction in case of pollution.