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Efkarpía, nestled within the Kentrikí Makedonía region of Greece, occupies a strategically significant position at approximately 40.68°N, 22.95°E. The city’s geography is defined by its location on the slopes of Mount Paiko, a prominent feature of the Thessaloniki metropolitan area. This elevation, averaging around 300-450 meters above sea level, contributes to localized microclimates and influences air circulation patterns. Efkarpía sits on the western periphery of Thessaloniki, experiencing a distinct urban–rural gradient. While benefiting from proximity to the larger city’s infrastructure and economic opportunities, it retains a more residential character, with pockets of agricultural land and olive groves visible in the surrounding landscape. The Thermaic Gulf, a branch of the Aegean Sea, lies approximately 10 kilometers to the west, offering a potential pathway for sea breezes that can influence local air quality. The broader region is characterized by a mix of agricultural zones – primarily focused on fruits, vegetables, and olives – and industrial areas concentrated around Thessaloniki. This combination means Efkarpía is susceptible to both agricultural emissions (ammonia from fertilizers, dust from tilling) and industrial pollutants carried by prevailing winds. The terrain’s undulating nature, combined with the city’s built environment, can create areas of stagnant air, particularly during periods of calm weather, exacerbating pollution accumulation. The surrounding landscape, a blend of hills, cultivated fields, and urban sprawl, shapes the city’s vulnerability to external pollution sources.

Efkarpía’s air quality follows a distinct seasonal pattern dictated by the region’s Mediterranean climate. Summers (June-August) are typically hot and dry, characterized by prolonged periods of sunshine and minimal rainfall. This often leads to temperature inversions, where a layer of warm air traps cooler air near the ground, preventing pollutants from dispersing. The lack of wind during these months further compounds the issue, resulting in a build-up of particulate matter and ozone. Spring (March-May) brings a gradual increase in rainfall and more frequent wind events, which generally improve air quality, though agricultural activities can contribute to localized ammonia spikes. Autumn (September-November) sees a return to calmer conditions, with occasional fog, which can trap pollutants and reduce visibility. The transition months of October and November are often periods of moderate concern. Winters (December-February) are relatively mild and wet, with occasional cold snaps. While rainfall helps to cleanse the atmosphere, periods of prolonged calm can still lead to localized pollution episodes. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the summer months, limiting outdoor activity during peak heat and avoiding areas with high traffic density. Spring and autumn offer more favourable conditions, but awareness of agricultural practices and potential fog events remains important. The interplay of temperature, wind patterns, and precipitation creates a dynamic air quality profile throughout the year, requiring adaptive strategies for public health protection.