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Esztergom, nestled on the north bank of the Danube River in northwestern Hungary, occupies a geographically significant position. As the county seat of Komárom-Esztergom, it forms part of the Danube-Tisza Interflumen, a region characterized by gently rolling hills and fertile plains. The city’s location directly across from the Slovakian town of Štúrovo, separated only by the river, creates a unique transboundary urban landscape. Esztergom sits at an elevation of approximately 115 meters (377 feet) above sea level, contributing to a relatively mild climate but also influencing local air circulation patterns. The surrounding landscape is predominantly agricultural, with extensive fields of wheat, corn, and sunflowers stretching outwards, interspersed with smaller villages and wooded areas. Historically, this agricultural zone has contributed to seasonal particulate matter, particularly during harvest periods. To the east, the Börzsöny Mountains provide a partial barrier, influencing wind direction and potentially trapping pollutants under certain meteorological conditions. The urban–rural gradient is relatively gradual, with agricultural land seamlessly transitioning into residential areas within the city limits. The Danube itself plays a crucial role, acting as a transport corridor and influencing local humidity and temperature. While Esztergom isn't situated directly within a major industrial belt, its proximity to larger Hungarian cities like Budapest and Komárom means that transboundary pollution and industrial emissions can occasionally impact air quality. The city’s compact urban form, with a historic core and expanding suburban areas, also contributes to localized pollution sources like traffic and residential heating.

Esztergom’s air quality experiences a distinct seasonal cycle heavily influenced by meteorological conditions. Winter months (December-February) often present the greatest challenges. Cold temperatures and frequent temperature inversions, where a layer of warm air traps cooler air near the ground, lead to pollutant accumulation. Reduced wind speeds during this period exacerbate the problem, limiting the dispersal of emissions from residential heating (primarily wood and coal) and vehicular traffic. Fog, a common occurrence in winter, further restricts air movement and concentrates pollutants. Spring (March-May) brings a gradual improvement as temperatures rise and wind speeds increase, dispersing pollutants more effectively. Agricultural activities, however, can introduce particulate matter from field preparation and fertilizer application. Summer (June-August) generally sees the best air quality, with consistent winds and higher temperatures promoting good ventilation. However, occasional heatwaves can lead to stagnant air and increased ozone formation. Autumn (September-November) presents a mixed picture. While wind speeds remain relatively high, agricultural activities, particularly the harvest of crops, release significant amounts of dust and particulate matter into the atmosphere. The transition period also sees a return to residential heating as temperatures drop. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should be particularly cautious during winter and autumn, limiting outdoor activity on days with poor visibility or stagnant air. During harvest season, wearing a mask can help reduce exposure to agricultural dust. Maintaining efficient heating systems and reducing vehicle idling can contribute to improved air quality for everyone.