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Tomaszów Lubelski, nestled within the Lubelskie Voivodeship of southeastern Poland, occupies a gently undulating landscape characteristic of the Central European Plain. The city’s coordinates, 50.4500° N, 23.4167° E, place it within a transitional zone between the Sandomierz Basin and the Lublin Upland. The terrain is relatively flat, with subtle variations in elevation, generally ranging between 180-220 meters above sea level. This low-lying position, coupled with its inland location, significantly influences local air quality. The Tanew River flows nearby, but its impact on dispersing pollutants is limited due to its size and flow rate. Surrounding Tomaszów Lubelski is a predominantly agricultural landscape, with extensive fields of grains and root vegetables. While not a major industrial hub itself, the city is within reach of larger industrial areas to the west and north, meaning long-range transport of pollutants is a factor. The urban-rural gradient is relatively sharp; the city’s compact size is immediately bordered by farmland and forested areas. This proximity to agricultural land introduces seasonal particulate matter from harvesting and field preparation. The prevailing winds, often from the west, can carry pollutants from these sources directly over the city, impacting air quality, particularly during drier periods. The lack of significant topographical barriers hinders natural ventilation.

Air quality in Tomaszów Lubelski exhibits a distinct seasonal pattern. Winter, from December to February, typically sees the poorest air quality. Low temperatures create stable atmospheric conditions, frequently leading to temperature inversions that trap pollutants near the ground. The dominant heating source – coal and wood burning in residential stoves – contributes significantly to particulate matter (PM) concentrations. Fog, common during these months, exacerbates the issue by reducing dispersion. Spring (March-May) brings gradual improvement as temperatures rise and heating demand decreases, though agricultural activities like burning crop residue can cause temporary spikes in PM. Summer (June-August) generally offers the cleanest air, aided by higher temperatures, stronger winds, and increased atmospheric mixing. However, prolonged heatwaves can sometimes lead to ozone formation. Autumn (September-November) sees a return to deteriorating conditions as heating season begins. October and November are particularly problematic, with damp conditions and increased coal burning. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during winter and autumn months. Monitoring pollen levels is also advisable during spring. Avoiding peak heating hours and staying indoors on days with stagnant air are recommended preventative measures.