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Bitonto, nestled in the heart of Puglia, Italy, occupies a strategic position within the broader Apulian landscape. Located approximately 13 kilometers northeast of Bari, it forms part of the metropolitan area, experiencing a gradual urban–rural gradient as one moves outwards. The city’s coordinates (41.1083, 16.6917) place it on a gently undulating terrain, characterized by limestone bedrock and fertile alluvial plains formed by the Bradano River, which flows nearby. This river, while providing a vital water source, can also contribute to localized humidity and fog formation, impacting air quality under certain conditions. Bitonto sits at an elevation of roughly 100 meters above sea level, a relatively low altitude that can exacerbate the trapping of pollutants, particularly during temperature inversions. The surrounding landscape is predominantly agricultural, with olive groves, vineyards, and wheat fields dominating the countryside. This agricultural activity, while economically significant, introduces potential sources of particulate matter, especially during harvesting and tilling seasons. Further afield, the industrial belt concentrated around Bari introduces a regional pollution influence, with emissions occasionally transported to Bitonto depending on prevailing wind patterns. The Adriatic Sea, though not immediately adjacent, exerts a moderating influence on the climate and can affect coastal breezes that impact local air circulation. The urban character of Bitonto is a blend of historic architecture and modern development, with a dense core gradually transitioning to more suburban residential areas, influencing localized pollution patterns.

Bitonto’s air quality follows a distinct seasonal pattern dictated by its Mediterranean climate. Summers, spanning June to August, are typically hot and dry, characterized by stagnant air and frequent temperature inversions. These inversions trap pollutants close to the ground, leading to a noticeable increase in particulate matter and ozone concentrations. The lack of significant rainfall during this period further compounds the issue, as there’s minimal natural cleansing of the atmosphere. August, in particular, often sees heightened pollution levels due to agricultural activities and increased vehicle traffic during the holiday season. Conversely, autumn (September-November) brings a welcome shift. Increased rainfall helps to wash away pollutants, and more frequent wind events disperse stagnant air. However, agricultural burning, a traditional practice in the region, can temporarily elevate particulate matter levels. Winters (December-February) are generally the most favourable period for air quality, with cooler temperatures and more frequent rainfall. However, fog, common during these months, can trap pollutants, creating localized pockets of poor air quality. Spring (March-May) sees a gradual improvement as temperatures rise and winds increase, but pollen levels can also become a concern for sensitive individuals. Sensitive groups, including children, the elderly, and those with respiratory conditions, should limit outdoor exertion during the hot, still summer months and be mindful of potential agricultural burning in autumn. During periods of fog in winter, it’s advisable to avoid prolonged exposure to outdoor air.