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Püspökladány, nestled within the Hajdú-Bihar county of Hungary, occupies a geographically significant position in the Great Hungarian Plain (Alföld). Its coordinates, 47.3197° N, 21.1139° E, place it squarely within a predominantly flat, agricultural landscape. The terrain is gently undulating, characteristic of the Pannonian Basin, with elevations rarely exceeding 150 meters above sea level. This flatness, while facilitating agriculture, can unfortunately exacerbate air quality issues, particularly during periods of temperature inversion. The city itself is a relatively small urban center, exhibiting a clear urban–rural gradient; its immediate surroundings are dominated by arable farmland, primarily maize, wheat, and sunflowers, interspersed with pastures. While Püspökladány lacks direct proximity to major rivers, it benefits from the presence of smaller streams and drainage channels that contribute to local humidity. The region’s climate is continental, with hot summers and cold winters, influencing evaporation rates and atmospheric stability. The absence of significant natural barriers means that pollutants can readily spread across the plain. While not directly adjacent to major industrial belts, Püspökladány’s location within a broader agricultural region means that agricultural practices, including fertilizer application and livestock farming, contribute to localized emissions. The surrounding landscape, largely open and cultivated, offers limited natural air filtration, making the city’s air quality particularly susceptible to regional weather patterns and agricultural activities. The relatively low elevation contributes to potential for cold air pooling during winter months.

Püspökladány’s air quality experiences a distinct seasonal cycle dictated by its continental climate and agricultural practices. Spring (March-May) sees a gradual improvement as temperatures rise and winds increase, dispersing accumulated winter pollutants. However, this period also coincides with the start of the agricultural season, bringing increased ammonia emissions from fertilizer application and livestock operations, potentially impacting local air quality. Summer (June-August) generally offers the best air quality, with frequent convective mixing driven by daytime heating, effectively diluting pollutants. However, prolonged heatwaves can lead to stagnant air conditions and ozone formation. Autumn (September-November) marks a transition period, with decreasing temperatures and increasing humidity. Fog, common during this season, traps pollutants near the ground, leading to periods of reduced visibility and potentially elevated concentrations of particulate matter. The harvest season also contributes to dust emissions. Winter (December-February) typically presents the most challenging air quality conditions. Cold, stable air masses frequently lead to temperature inversions, where a layer of warm air sits above cooler air near the ground, preventing vertical mixing and trapping pollutants. This is often exacerbated by reduced wind speeds. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit outdoor activity during prolonged periods of fog or temperature inversions. Agricultural workers should be mindful of ammonia exposure during fertilizer application. Maintaining indoor air quality through ventilation and air purification can also be beneficial during the colder months.