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Lubaczów, nestled in the southeastern corner of Poland’s Podkarpackie Voivodeship, occupies a gently undulating landscape within the Sandomierz Basin. The town’s coordinates, 50.1667° N, 23.1167° E, place it relatively close to the Ukrainian border, influencing its historical and contemporary character. The terrain is characterised by loess formations and fertile black earth, supporting a predominantly agricultural hinterland. While Lubaczów itself isn’t situated directly on a major waterway, it lies within the drainage basin of the Tanew River, a tributary of the San River, impacting local humidity and potential for localised fog formation. The surrounding region is largely rural, with a gradual urban-rural gradient as one moves away from the town centre. Historically, the area experienced limited heavy industry, but the post-socialist period has seen some growth in small-scale manufacturing and agricultural processing. This, coupled with the prevalence of solid fuel heating during colder months, contributes to localised air quality concerns. The relatively flat topography can also hinder the dispersion of pollutants, particularly during stable atmospheric conditions. Lubaczów’s position within a basin means that air masses can become trapped, exacerbating pollution episodes. The surrounding forests, while beneficial for overall environmental health, can also contribute to biogenic volatile organic compound emissions.

Lubaczów’s air quality follows a distinct seasonal pattern. Winter, from November to February, typically sees the highest pollution levels. This is primarily due to increased reliance on coal and wood burning for residential heating, combined with frequent temperature inversions – a common meteorological phenomenon in the basin where a layer of warm air traps cooler, polluted air near the ground. These inversions are particularly pronounced during calm, clear nights. Spring (March-May) brings a gradual improvement as heating demand decreases, but agricultural activities, including field burning, can temporarily elevate particulate matter. Summer (June-August) generally offers the cleanest air, aided by prevailing winds and higher temperatures promoting pollutant dispersion. However, prolonged periods of hot, dry weather can lead to increased ozone formation. Autumn (September-October) sees a resurgence of pollution as heating systems are reactivated, and damp conditions can trap pollutants. Sensitive individuals – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during winter and autumn months. Fog, common in the autumn and winter, further concentrates pollutants. Monitoring wind direction is crucial; winds from the east or southeast often carry pollutants from nearby agricultural areas or smaller settlements.