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Taher, nestled within the Jijel province of Algeria, presents a fascinating case study in coastal urban geography. Situated at coordinates 36.7719, 5.8983, the city benefits from a Mediterranean climate and a location along the Algerian coastline. The terrain is characterised by a blend of coastal plains and the foothills of the Tell Atlas mountains, rising inland. This topography significantly influences air quality; the mountains can trap pollutants during periods of calm weather, while sea breezes offer some degree of dispersion. With a population of approximately 78,500, Taher is a moderate-sized urban centre. The surrounding landscape is a mix of agricultural land – primarily olive groves and small-scale farming – and increasingly, residential development. While not a major industrial hub, regional industries related to food processing and light manufacturing contribute to localised emissions. The urban-rural gradient is relatively sharp, transitioning quickly from denser built-up areas to agricultural fields and then to mountainous terrain. Proximity to the Mediterranean Sea moderates temperatures but also introduces the potential for salt spray and humidity-related atmospheric reactions affecting pollutant formation. Understanding these geographical factors is crucial for assessing and mitigating air quality challenges in Taher.

Air quality in Taher follows a distinct seasonal pattern, heavily influenced by the Mediterranean climate. Summer (June-August) often sees relatively cleaner air, driven by consistent sea breezes that disperse pollutants. However, high temperatures can exacerbate ozone formation, a secondary pollutant. Autumn (September-November) brings a transition period, with decreasing wind speeds and the potential for temperature inversions, trapping pollutants closer to the ground. This can lead to noticeable air quality declines. Winter (December-February) is generally the period of poorest air quality. Reduced sunlight hinders pollutant dispersion, and increased reliance on heating – often utilising wood or other solid fuels – contributes to particulate matter concentrations. Fog, common during winter mornings, further exacerbates the issue. Spring (March-May) sees a gradual improvement as temperatures rise and winds become more frequent. However, agricultural burning, a practice sometimes used for land preparation, can cause temporary spikes in pollution. Sensitive groups – children, the elderly, and those with respiratory conditions – should be particularly cautious during winter and autumn. Avoiding strenuous outdoor activity on still, foggy days is advisable. Monitoring local conditions and heeding any public health advisories is crucial for protecting respiratory health throughout the year.