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Bibā, nestled within the Banī Suwayf Governorate of Egypt (coordinates 28.9218° N, 30.9844° E), occupies a geographically significant position along the western bank of the Nile River. The city’s terrain is predominantly flat, characteristic of the Nile Valley, with gently sloping land extending towards the surrounding desert. Its elevation averages around 25 meters above sea level, contributing to a relatively stable atmospheric layer, though this can also exacerbate pollution accumulation under certain conditions. Bibā’s location within the Nile River Valley places it within a fertile agricultural zone, with extensive fields of crops like cotton, wheat, and sugarcane dominating the landscape surrounding the urban area. This agricultural activity, while vital to the regional economy, introduces potential sources of air pollutants, including dust from tilling and pesticide drift. To the west, the desert stretches outwards, acting as a barrier that can limit the dispersion of pollutants, particularly during periods of low wind. The urban–rural gradient transitions rapidly from the city’s core to the agricultural fields and then to the arid desert. The Nile itself provides a degree of humidity, but its influence on air quality is secondary to the broader regional climate patterns. There are no major industrial belts immediately adjacent to Bibā, but the proximity to larger industrial centers further up or down the Nile Valley can contribute to transboundary pollution events. The city’s relatively small size and primarily agricultural surroundings mean that local sources, such as vehicle emissions and residential heating (particularly during cooler months), play a more significant role in its immediate air quality profile.

Bibā’s air quality experiences a distinct seasonal cycle dictated by Egypt’s climate. The hot, dry months of summer (June-August) are typically characterized by high temperatures and minimal rainfall, leading to increased dust concentrations due to windblown sand from the surrounding desert. The lack of precipitation means pollutants accumulate, and stagnant air masses are common, hindering dispersion. Conversely, the cooler months (November-February) often bring a slight improvement in air quality, although temperature inversions can occur, trapping pollutants close to the ground, especially during periods of calm winds and fog. Spring (March-May) sees a gradual increase in temperatures and dust levels as the desert winds pick up. Autumn (September-October) is generally a transitional period with moderate temperatures and relatively stable air quality. Agricultural practices significantly influence seasonal patterns; the burning of crop residues after harvest, particularly in autumn, can lead to localized spikes in particulate matter. During the winter months, the increased use of solid fuels for heating in homes can also contribute to localized pollution. Sensitive groups, such as children, the elderly, and individuals with respiratory conditions, should exercise caution during periods of high dust and potential temperature inversions, limiting outdoor activity and ensuring adequate ventilation. The dry climate means that respiratory irritants are more impactful, and hydration is crucial for maintaining respiratory health. Awareness of wind patterns and local agricultural practices is key to anticipating potential air quality fluctuations.