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Havlíčkŭv Brod, nestled within the Vysočina region of the Czech Republic, occupies a geographically significant position at approximately 49.6078° N, 15.5808° E. The city’s terrain is characterized by gently rolling hills, a typical feature of the Bohemian–Moravian Highlands, contributing to localized microclimates that can influence air quality. Situated at an elevation of around 500 meters above sea level, Havlíčkŭv Brod experiences a continental climate with distinct seasonal variations. The surrounding landscape is predominantly agricultural, with extensive fields of grain and rapeseed interspersed with pockets of deciduous forest, particularly along the nearby Rokytná River. This river, while not a major waterway, provides a degree of humidity and influences local weather patterns. The urban–rural gradient is relatively smooth; the city seamlessly blends into the agricultural landscape, with smaller villages and farms visible within a short distance. Historically, the region has seen some light industrial activity, primarily related to food processing and machinery, though these are not major pollution sources compared to larger Czech cities. The city’s location, shielded somewhat by the surrounding hills, can trap pollutants under certain meteorological conditions, particularly during periods of temperature inversion. The prevailing winds generally flow from the west, bringing air masses from across Germany and Bavaria, which can occasionally introduce transboundary pollutants. The relatively low population density compared to Prague or Brno means that local emissions are generally lower, but regional agricultural practices and occasional industrial activity still play a role in the city’s air quality profile.

Havlíčkŭv Brod’s air quality follows a predictable seasonal pattern dictated by the continental climate. Spring (March-May) often sees a gradual improvement as temperatures rise and winds increase, dispersing accumulated winter pollutants. However, agricultural activities, including the spreading of fertilizers and the initial stages of field work, can contribute to localized ammonia emissions. Summer (June-August) typically offers the best air quality, with consistent winds and higher temperatures promoting good ventilation. Occasional heatwaves can, however, lead to stagnant air and increased ozone formation, though this is generally less pronounced than in more southerly European cities. Autumn (September-November) brings a shift, with cooler temperatures and calmer winds. This often results in temperature inversions, particularly during clear, still nights, trapping pollutants close to the ground. Agricultural burning, though regulated, can also contribute to particulate matter during this period. Winter (December-February) is generally the most challenging season. Cold temperatures, frequent fog, and low wind speeds create conditions conducive to pollutant accumulation. Residential heating, primarily using wood or coal in older homes, is a significant source of particulate matter and carbon monoxide. Sensitive groups, such as the elderly, children, and individuals with respiratory conditions, should limit prolonged outdoor exposure during these periods, especially on days with dense fog or calm conditions. Maintaining indoor air quality through proper ventilation and air purification can also be beneficial. The transition months of spring and autumn require particular vigilance, as agricultural practices and changing weather patterns can lead to unpredictable air quality fluctuations.