Horodok Air Quality Index (AQI)

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Horodok, nestled within the Lvivska Oblast of western Ukraine, occupies a geographically significant position at approximately 49.78°N, 23.64°E. The city’s terrain is characterized by rolling hills and valleys, a typical feature of the Carpathian foothills that define this region. Situated at an elevation of roughly 310 meters above sea level, Horodok benefits from a moderate climate influenced by its proximity to the Carpathian Mountains, which act as a barrier against some weather systems but also contribute to localized microclimates. The surrounding landscape is predominantly agricultural, with extensive fields of grain and sunflowers interspersed with pockets of deciduous forest. This agricultural activity, while vital to the regional economy, can contribute to seasonal particulate matter pollution, particularly during harvest periods. To the east, the broader industrial belt of Lviv, though distant, can occasionally influence air quality through long-range transport of pollutants. The urban–rural gradient around Horodok is relatively gradual; the city blends seamlessly into the agricultural landscape, with smaller villages and rural settlements dotting the surrounding countryside. The Strypa River flows nearby, offering a natural drainage system and a potential mitigating factor against stagnant air, though its impact is limited by the relatively small scale of the city. The geological composition of the area, with underlying shale and limestone, can also influence local atmospheric chemistry and the deposition of pollutants. The city’s compact urban form, largely shaped by its historical development, means that emissions are concentrated within a relatively small area, potentially exacerbating localized air quality issues.

Horodok’s air quality experiences a distinct seasonal cycle heavily influenced by meteorological conditions. Spring (March-May) typically sees an improvement in air quality as temperatures rise and winds increase, dispersing accumulated pollutants. However, agricultural activities, including fertilizer application, can introduce ammonia and other compounds into the atmosphere. Summer (June-August) generally offers the best air quality, with consistent winds and relatively low temperatures, though occasional heatwaves can lead to stagnant air and increased ozone formation. Autumn (September-November) presents the most challenging period. Harvest activities release significant amounts of particulate matter from agricultural fields, while temperature inversions, common during this season, trap pollutants near the ground, leading to periods of reduced visibility and elevated concentrations of fine particles. The Carpathian Mountains can also block prevailing winds, further exacerbating this effect. Winter (December-February) brings cold temperatures and frequent fog, which significantly reduces air mixing and allows pollutants to accumulate. The use of solid fuel for heating in homes, a common practice in the region, contributes substantially to particulate pollution during these months. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit outdoor activity during autumn and winter, particularly on days with fog or temperature inversions. During harvest season, wearing a mask can help reduce exposure to particulate matter. Maintaining indoor air quality through ventilation and air purifiers is also advisable during periods of poor air quality.