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Medgidia, situated in Constanţa County, Romania, occupies a strategic yet vulnerable position within the Dobruja region. Located at coordinates 44.2503°N, 28.2614°E, the city lies relatively close to the Black Sea coast, approximately 20km inland. The terrain is predominantly flat to gently undulating, characteristic of the Dobruja plateau, a landscape shaped by ancient river systems and glacial activity. This flatness, while facilitating urban development, hinders natural air dispersion. Medgidia is positioned within a broader agricultural zone, with extensive wheat and sunflower fields surrounding the city, alongside pockets of light industry related to food processing and materials. The urban-rural gradient is relatively sharp, transitioning quickly from residential areas to agricultural land. Historically, Medgidia served as a crucial railway hub, contributing to its industrial development. This legacy, combined with agricultural practices and increasing road traffic, contributes to localised air pollution. The proximity to the Black Sea introduces maritime influences, moderating temperatures but also potentially trapping pollutants during specific weather patterns. The city’s location within a river valley can exacerbate pollution episodes due to limited atmospheric mixing. Understanding these geographical factors is crucial for addressing Medgidia’s air quality challenges.

Medgidia’s air quality follows a distinct seasonal pattern. Spring (March-May) often sees a rise in particulate matter due to agricultural activities – ploughing and burning of crop residue – combined with increasing temperatures and stagnant air. This is a period to be cautious for those with respiratory sensitivities. Summer (June-August) generally offers the best air quality, benefiting from prevailing winds that help disperse pollutants and increased rainfall that washes particles from the atmosphere. However, heatwaves can trap pollutants near the ground. Autumn (September-November) witnesses a deterioration in air quality as heating systems are activated, contributing to increased emissions of sulphur dioxide and nitrogen oxides, particularly from older, less efficient boilers. November is often the most polluted month. Winter (December-February) is characterised by temperature inversions, where a layer of warm air traps cold, polluted air near the surface, leading to prolonged periods of poor air quality. Fog, common during winter, further exacerbates this. Sensitive individuals – children, the elderly, and those with pre-existing respiratory or cardiovascular conditions – should limit outdoor exposure during autumn and winter, and monitor local conditions closely. Spring also requires vigilance.