Khulayş Air Quality Index (AQI)

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Khulayş, nestled within the Makkah al Mukarramah province of Saudi Arabia (coordinates 22.1555, 39.3202), is a relatively small city of approximately 63,445 inhabitants. Its geography is defined by its location in the Asir Mountains foothills, transitioning towards the Red Sea coastal plain. The terrain is undulating, characterised by wadis (dry riverbeds) and rocky outcrops, with elevation increasing eastward. This proximity to the mountains influences local wind patterns and can contribute to temperature inversions, trapping pollutants. Khulayş isn’t directly on the Red Sea coast, but is close enough to experience maritime influences, including humidity. The surrounding landscape is primarily desert scrubland, with limited agricultural activity concentrated around available groundwater sources. There are no major industrial belts immediately adjacent to Khulayş, though the broader Makkah region experiences industrial activity related to construction and pilgrimage support. The urban-rural gradient is fairly sharp; the city itself is a concentrated settlement surrounded by sparsely populated, arid land. Dust storms, originating from the vast deserts to the east, are a significant geographical factor impacting air quality, carrying particulate matter over considerable distances. The city’s location within a valley can exacerbate the concentration of these airborne particles.

Khulayş experiences a bimodal climate, with a hot, dry season and a comparatively milder, wetter season. Air quality in Khulayş is most compromised during the spring (March-May) and summer (June-August). The spring brings increased dust storms, fuelled by strong winds sweeping across the desert, significantly elevating particulate matter concentrations. Summer heat exacerbates this, creating stable atmospheric conditions that trap pollutants. Temperature inversions are common, preventing vertical mixing and concentrating emissions near ground level. The wetter season, from November to February, offers some respite, with occasional rainfall scavenging pollutants from the air. However, increased humidity can also promote the formation of secondary pollutants. September and October are transition months, with fluctuating conditions. For sensitive groups – children, the elderly, and those with respiratory conditions – avoiding strenuous outdoor activity during the spring and summer is advisable. Monitoring local weather reports for dust storm warnings is crucial. The winter months generally present the most favourable air quality, though indoor heating can contribute to localised pollution. Fog, though infrequent, can trap pollutants during cooler mornings.