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Sarāvān, nestled within the Sīstān va Balūchestān province of Iran, occupies a geographically challenging position. Located at coordinates 27.3708, 62.3325, the city sits amidst a rugged, arid landscape dominated by the Makran Range foothills. The terrain is characterised by rocky outcrops, sandy plains, and intermittent wadis – dry riverbeds that occasionally flood during rare rainfall events. Sarāvān’s elevation, approximately 1200 meters above sea level, contributes to cooler temperatures than the surrounding lower-lying desert, but also influences atmospheric circulation. The city is relatively distant from major bodies of water; the nearest significant water source is the Sea of Oman, some distance to the south. While Sarāvān isn’t a heavily industrialised centre, regional agricultural activity, primarily date palm cultivation and livestock rearing, contributes to localised dust and particulate matter. The urban-rural gradient is stark, with the city centre transitioning rapidly into sparsely populated nomadic and agricultural lands. This proximity to open land means Sarāvān is highly susceptible to windblown dust, a major contributor to its air quality challenges. The prevailing winds, often originating from the western and southwestern deserts, carry significant amounts of particulate matter directly into the city, exacerbating pollution levels. The city’s location within a basin can also trap pollutants, limiting dispersion.

Sarāvān experiences a harsh desert climate, with air quality fluctuating dramatically across the year. The most challenging period is typically from late spring through summer (April-September). Intense heat and strong winds combine to create frequent dust storms, dramatically increasing particulate matter concentrations. These ‘windstorms’ – known locally as ‘bad-o-bād’ – are particularly severe during the *ghūb* winds, originating from the deserts to the west. Winter (November-February) offers a brief respite, with cooler temperatures and reduced wind activity leading to improved air quality, though temperature inversions can trap pollutants near the ground. Rainfall is scarce and erratic, but when it occurs, it temporarily suppresses dust. March and October represent transitional months, with fluctuating conditions. The monsoon season, though less pronounced than in other parts of Iran, can bring localised flooding and increased humidity, potentially impacting mould spore counts. Sensitive groups – children, the elderly, and those with respiratory conditions – should avoid prolonged outdoor activity during the spring and summer months. Wearing masks (N95 or equivalent) is advisable during dust storms. Monitoring local weather reports and heeding public health advisories is crucial. The dry climate necessitates staying hydrated and protecting skin from sun exposure, even on days with seemingly good air quality.