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Sitrah, located in the Al ‘Āşimah Governorate of Bahrain, occupies a strategically important coastal position on the eastern shore of the island nation. Its coordinates, 26.1200° N, 50.6500° E, place it within a predominantly flat, arid landscape characteristic of Bahrain. The terrain is gently undulating, transitioning from sandy coastal plains to slightly elevated areas inland. The city’s proximity to the Arabian Gulf significantly influences its microclimate and, consequently, its air quality. The surrounding landscape is largely urbanized, with residential and commercial developments extending towards the coastline. While agricultural zones are present in Bahrain, Sitrah itself is primarily urban, with limited agricultural activity directly adjacent to the city. The urban–rural gradient is relatively sharp, with the transition occurring within a few kilometers of the city limits, giving way to more sparsely populated areas and occasional date palm groves. The eastern location exposes Sitrah to prevailing winds from the Gulf, which can both disperse pollutants and, under certain conditions, trap them. The shallow depth of the Gulf and the relatively low elevation of Bahrain (averaging around 30 meters) contribute to a tendency for temperature inversions, particularly during calmer periods. Industrial activity, concentrated in nearby areas of Al ‘Āşimah, contributes to regional air pollution, impacting Sitrah’s air quality. The city’s dense urban fabric, with its concentration of vehicles and buildings, further exacerbates localized pollution issues. The surrounding landscape, therefore, presents a complex interplay of factors affecting air quality, ranging from regional industrial emissions to local urban sources.

Bahrain’s climate dictates a distinct seasonal pattern impacting Sitrah’s air quality. The hot, humid summers (June-August) are characterized by intense solar radiation and stagnant air conditions. High temperatures suppress atmospheric mixing, leading to the potential for pollutant accumulation, especially during periods of reduced wind. The humidity, while offering some relief from the heat, can trap particulate matter close to the ground. Conversely, the cooler, drier months of winter (December-February) generally see improved air quality due to increased wind speeds and greater atmospheric stability. These winds effectively disperse pollutants, preventing significant build-up. The transitional spring (March-May) and autumn (September-November) months present a more variable picture. Spring often experiences dust storms originating from the Arabian Peninsula, significantly degrading air quality with particulate matter. Autumn can be relatively pleasant, but occasional temperature inversions can occur, particularly in early autumn, leading to localized pollution episodes. During the summer months, sensitive individuals, such as those with respiratory conditions and young children, should limit outdoor activity during the hottest parts of the day. The winter months offer the most favorable conditions for outdoor pursuits. The spring months require vigilance regarding dust storm forecasts, and protective measures like wearing masks should be considered. Maintaining well-ventilated indoor spaces and utilizing air purifiers can further mitigate the impact of poor air quality, particularly during periods of elevated pollution.