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Boldājī, nestled within the Chahār Maḩāl va Bakhtīārī province of Iran, occupies a geographically significant position at approximately 31.9356° N, 51.0544° E. The city’s terrain is characterized by a gently sloping landscape, part of the Zagros Mountains foothills, resulting in an elevation of around 1,750 meters (5,741 feet) above sea level. This elevation contributes to cooler temperatures compared to lower-lying regions, but also creates conditions conducive to temperature inversions, a key factor influencing air quality. Boldājī is surrounded by a mosaic of agricultural lands, primarily dedicated to wheat and barley cultivation, interspersed with scattered orchards and grazing pastures. The rural-urban gradient is relatively gradual, with smaller villages and agricultural communities blending seamlessly into the city’s periphery. While no major rivers directly flow through Boldājī, the region benefits from seasonal rainfall and groundwater resources, supporting agricultural activities. The city’s location is not immediately adjacent to major industrial belts, however, regional transportation routes pass nearby, potentially contributing to localized pollution from vehicle emissions. The surrounding landscape, dominated by semi-arid steppe and low hills, limits effective dispersion of pollutants, particularly during periods of calm weather. The prevailing winds, often light and variable, can trap pollutants within the valley, exacerbating air quality challenges. The city’s relatively small size and primarily agricultural economy mean that local industrial sources are limited, but agricultural practices, such as burning crop residue, can contribute to seasonal air pollution episodes.

Boldājī’s air quality experiences a distinct seasonal cycle heavily influenced by regional weather patterns. Winters (December-February) are typically the most challenging period. Cold air masses frequently settle into the Zagros foothills, creating stable atmospheric conditions and promoting temperature inversions. These inversions trap pollutants near the ground, leading to increased concentrations of particulate matter and other emissions. Fog, common during these months, further restricts dispersion. Spring (March-May) brings a gradual improvement as temperatures rise and wind speeds increase, aiding in pollutant dispersal. However, agricultural burning, a traditional practice for land preparation, can introduce significant smoke pollution during this transition period. Summers (June-August) generally offer the best air quality, with warmer temperatures, stronger winds, and more frequent convective mixing that effectively dilutes pollutants. Dust storms originating from the central Iranian deserts can occasionally impact Boldājī, particularly in late spring and early summer. Autumn (September-November) sees a return to more stable atmospheric conditions, with decreasing temperatures and increasing humidity, which can trap pollutants. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during winter and early spring, limiting outdoor activities on days with stagnant air or visible haze. Agricultural workers should be particularly mindful of smoke exposure during spring burning season. Maintaining indoor air quality through ventilation and air purification can also be beneficial during periods of elevated pollution.