Air is a mixture of gases whose composition can depend on various factors such as altitude, weather conditions, pollution sources, etc. Air pollution plays a significant role in today's world, with a large share arising from human activities. Poor air quality affects the environment and, consequently, human health. Measuring air quality has become part of various legal frameworks and regulations aimed at controlling the emission of pollutants. Carbon dioxide (CO₂) is a greenhouse gas whose concentration in the atmosphere has been continuously rising since the Industrial Revolution, and efforts are being made to control its levels. Legally defined limit values for gas concentrations are established below which these gases do not pose a danger; that is, they represent a value below which there is the least possible risk of harmful effects on human health and/or the environment. Among the gases regulated by legal frameworks are nitrogen dioxide (NO₂) and carbon monoxide (CO). Their measurements, along with CO₂, were conducted in the area of the city of Zenica. It was found that the highest average concentration of CO₂ was measured at monitoring station number 2, located at the roundabout, and it amounted to 606.25 ppm. The highest average concentration of NO₂ was also measured at monitoring station number 2, amounting to 0.0275 ppm. At station number 3, in the Tetovo settlement, the highest average concentration of CO was measured at 2.5 ppm.