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Mangalia, a coastal city in Romania’s Constanţa County, occupies a strategically important position on the Black Sea coast. Situated at coordinates 43.8172, 28.5828, the city’s terrain is characterised by gently sloping plains transitioning to the coastline. Its elevation is relatively low, averaging around 20-30 meters above sea level, making it susceptible to marine influences. The surrounding landscape is a mix of sandy beaches, agricultural land – primarily vineyards and sunflower fields – and limited forested areas further inland. Mangalia benefits from sea breezes, but its location within a bay can sometimes trap pollutants. While not heavily industrialised *within* the city limits, the larger Constanţa port and industrial zone, approximately 45km north, contribute to regional background pollution levels that can impact Mangalia, particularly during periods of unfavourable wind direction. The urban-rural gradient is relatively sharp, with agricultural areas immediately bordering the city, and denser urban development concentrated along the coast. This proximity to both agricultural practices (potential ammonia emissions) and a major port complex significantly influences the city’s air quality profile. The Black Sea itself moderates temperatures, but also contributes to humidity and potential for salt aerosol formation, impacting particulate matter composition.

Mangalia’s air quality follows a distinct seasonal pattern. Spring (March-May) sees a gradual improvement after the winter months, though agricultural activities like fertilisation can temporarily elevate ammonia and particulate matter. Summer (June-August) generally offers the cleanest air, driven by prevailing north-easterly winds that disperse pollutants offshore and higher temperatures promoting atmospheric mixing. However, increased tourist activity leads to localised traffic congestion and associated emissions. Autumn (September-November) marks a deterioration in air quality. Reduced wind speeds, increased heating demand, and the onset of temperature inversions trap pollutants closer to the ground. Smoke from burning agricultural residue also contributes to particulate matter levels. Winter (December-February) is typically the worst period for air quality. Low temperatures encourage the use of solid fuels for heating, and stable atmospheric conditions exacerbate pollution build-up. Fog, common during winter, further reduces visibility and concentrates pollutants. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor exertion during autumn and winter. Months to favour for outdoor activity are June, July, and August, but even then, monitoring local conditions is advisable. The Black Sea breeze offers some respite, but regional pollution from Constanţa can still be a factor.