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Cassano delle Murge, nestled in the heart of Puglia, Italy, occupies a unique geographic position within the Murge plateau. Situated at coordinates 40.8833, 16.7667, the town sits approximately 380 meters above sea level, contributing to a relatively cool and dry climate compared to the coastal areas of the region. The surrounding landscape is characterised by rolling hills, karst formations, and extensive agricultural land, primarily dedicated to olive groves and cereal crops. This agricultural dominance, while picturesque, introduces potential sources of particulate matter from farming activities, including soil disturbance and the use of agricultural machinery. The town isn’t directly adjacent to the Adriatic Sea, but is roughly 30km inland, meaning maritime influences are lessened. There are no major industrial belts immediately surrounding Cassano delle Murge, which is a positive factor for air quality, however, regional industrial activity further north towards Bari can contribute to background pollution levels. The urban-rural gradient is quite sharp; the town itself is relatively compact, quickly giving way to open countryside. This impacts dispersion of pollutants, with limited natural barriers to wind flow, but also a lack of significant urban heat island effects. The terrain’s permeability also influences groundwater quality, indirectly affecting dust levels.

Air quality in Cassano delle Murge experiences a distinct seasonal rhythm. Spring (March-May) often sees a rise in particulate matter due to agricultural activities – ploughing and sowing release dust into the air, exacerbated by potential dry spells and moderate winds. Summer (June-August) typically offers the cleanest air, with consistent breezes aiding dispersion and rainfall washing away pollutants. However, prolonged heatwaves can lead to increased ozone formation, a secondary pollutant. Autumn (September-November) presents a transitional period; harvesting activities contribute to dust, and the first temperature inversions begin to trap pollutants closer to the ground. These inversions, where a layer of warm air sits above cooler air, are most pronounced during the cooler months. Winter (December-February) is often the most challenging period. Reduced sunlight hours limit photochemical reactions that break down pollutants, and increased use of wood-burning stoves for heating contributes to particulate matter. Fog, common in the Murge plateau during winter, can further exacerbate pollution by trapping pollutants. Sensitive individuals – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during autumn and winter months, and monitor local conditions closely. Spring can also pose risks due to agricultural dust.