Sarvestān Air Quality Index (AQI)

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Sarvestān, nestled within the Fars Province of Iran at coordinates 29.2739° N, 53.2203° E, occupies a geographically significant position in the country’s south-central region. The city sits at an elevation of approximately 1680 meters (5512 feet) above sea level, contributing to a relatively cool, arid climate. Sarvestān is situated within a valley, surrounded by the Zagros Mountains to the west and the Kavir Desert to the north and east. This topography plays a crucial role in air quality, as the valley can trap pollutants, particularly during temperature inversions. The surrounding landscape is characterised by semi-arid steppe and rugged mountainous terrain. While not directly adjacent to a major body of water, the city’s water supply relies on groundwater resources and seasonal rainfall. Sarvestān’s economy is largely agricultural, with wheat, barley, and fruit orchards dominating the surrounding lands. The urban-rural gradient is pronounced, with a clear transition from the denser city centre to the agricultural fields and sparsely populated mountainous areas. Limited industrial activity exists, primarily related to agricultural processing, but dust from agricultural practices and potential emissions from local brick kilns contribute to particulate matter in the air. The prevailing winds, often originating from the desert, can transport dust and sand into the city, further impacting air quality.

Sarvestān experiences a distinct seasonal air quality pattern dictated by its arid climate and meteorological conditions. Spring (March-May) brings moderate temperatures and occasional dust storms originating from the surrounding deserts, leading to increased particulate matter. Summer (June-August) is intensely hot and dry, with stable atmospheric conditions and temperature inversions trapping pollutants near the ground, potentially worsening air quality despite reduced industrial activity. This is a period to limit strenuous outdoor activity. Autumn (September-November) offers the most favourable air quality, with cooler temperatures, increased precipitation, and winds that help disperse pollutants. This is the best time for outdoor pursuits. Winter (December-February) sees infrequent rainfall and often calm conditions, leading to the accumulation of pollutants, particularly from residential heating sources using wood or fossil fuels. Temperature inversions are common during winter mornings, exacerbating pollution. Sensitive groups – children, the elderly, and those with respiratory conditions – should exercise caution during these periods. Fog can also form in the valley, trapping pollutants and reducing visibility. Monitoring wind patterns is crucial, as winds from the desert consistently correlate with poorer air quality.