Surab Air Quality Index (AQI)

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Surab, nestled within the rugged landscape of Balochistan, Pakistan, occupies a geographically significant position at coordinates 28.4925°N, 66.2597°E. The city’s elevation, approximately 1,880 meters (6,170 feet) above sea level, contributes to a cooler, drier climate compared to lower-lying regions of Pakistan. Situated within a valley carved by the Sulaiman Mountains, Surab is surrounded by arid and semi-arid terrain, characterized by rocky outcrops and sparse vegetation. The surrounding landscape is predominantly mountainous, influencing wind patterns and creating localized microclimates. While not directly adjacent to a major body of water, the city’s water supply relies on underground aquifers and seasonal streams originating from the mountains. Surab functions as a crucial transit point along regional trade routes, connecting Quetta with areas further west. The urban-rural gradient is sharply defined; the city itself is relatively small, with a population of around 36,468, quickly transitioning to sparsely populated agricultural lands and nomadic pastoral areas. This proximity to agricultural activity, including potential for seasonal burning, and the transit of heavy goods vehicles, contributes to localised air quality concerns. Dust storms, common in Balochistan, are a significant factor, exacerbated by the arid environment and wind erosion of the surrounding terrain. The valley location can also trap pollutants, limiting dispersion.

Surab experiences a distinct seasonal air quality pattern dictated by its climate. Winters (November to February) often see poorer air quality due to temperature inversions trapping pollutants close to the ground, coupled with increased reliance on solid fuel for heating. Calm winds further exacerbate this. Dust storms, though possible year-round, are more frequent during these months, contributing to particulate matter. Spring (March to May) brings a temporary improvement as increased rainfall washes away some pollutants and suppresses dust. However, agricultural burning, preparing fields for planting, can cause localised spikes in pollution. Summers (June to August) are generally the cleanest, with monsoon rains providing significant cleansing, though humidity can increase. The intense heat can also contribute to the formation of ground-level ozone. Autumn (September to October) sees a return to drier conditions and a gradual build-up of pollutants as heating demand increases. Sensitive groups – children, the elderly, and those with respiratory conditions – should be particularly cautious during winter and spring. Avoiding strenuous outdoor activity during periods of high dust or smoke is advisable. Monitoring local conditions and staying indoors when pollution is visible is crucial for protecting health. The months of July and August generally offer the most favourable conditions for outdoor activities.