Naqadeh Air Quality Index (AQI)

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Naqadeh, nestled in the western Iranian province of Āz̄arbāyjān-e Gharbī, occupies a geographically significant position within the Zagros Mountains. The city’s coordinates (36.9547, 45.3881) place it in a valley environment, at an elevation of approximately 1,280 meters (4,200 feet). This mountainous terrain profoundly influences local air quality. The surrounding landscape is characterised by steep slopes and intermontane basins, limiting atmospheric dispersion of pollutants. The Little Zab River flows nearby, but its influence on immediate air quality is less significant than the topographical constraints. Naqadeh’s urban character is typical of a regional Iranian city, with a growing population of 72,975, experiencing a gradual urban-rural gradient as it expands into the surrounding agricultural lands. Agriculture, primarily dryland farming of wheat and barley, dominates the regional economy, with potential for dust emissions during harvest and land preparation. While not a major industrial hub, localised workshops and small-scale manufacturing contribute to emissions. The valley location creates a natural bowl effect, exacerbating pollution build-up, particularly during periods of stagnant air. The prevailing winds, often channelled through the mountain passes, can either flush out pollutants or, conversely, trap them depending on atmospheric stability. This complex interplay of topography and meteorology dictates Naqadeh’s air quality challenges.

Naqadeh’s air quality follows a distinct seasonal pattern. Spring (March-May) often sees a temporary improvement as rainfall washes away accumulated particulate matter, though agricultural burning can introduce localised spikes in pollution. Summers (June-August) are typically drier and hotter, leading to increased dust suspension from the surrounding arid and semi-arid lands. Temperature inversions, common during calm summer nights, trap pollutants near the ground, worsening air quality in the mornings. Autumn (September-November) presents a transitional period, with decreasing temperatures and potential for increased heating-related emissions as residents prepare for winter. This is often a period of moderate pollution levels. Winters (December-February) are the most challenging for air quality. Cold temperatures encourage increased use of fossil fuels for heating, particularly in residential areas. Snowfall can temporarily improve conditions, but often leads to a build-up of pollutants when the snow melts. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during cold, still winter days. Months to avoid for strenuous outdoor activity are December, January, and February. Monitoring wind patterns is crucial; periods of calm are associated with poorer air quality. Local meteorological forecasts should be consulted regularly.