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Pajo, a coastal town in the Nusa Tenggara Timur (East Nusa Tenggara) province of Indonesia, occupies a geographically significant position on the island of Timor. Located at approximately -8.5167 latitude and 120.3333 longitude, Pajo benefits from direct access to the Savu Sea, influencing its climate and potentially its air quality. The terrain surrounding Pajo is characterised by a mix of low-lying coastal plains and gently undulating hills, typical of Timor’s landscape. The town’s elevation is relatively low, increasing vulnerability to sea breezes and associated moisture. While Pajo isn’t a major industrial hub, the surrounding region features agricultural activity, primarily subsistence farming and some small-scale fishing. This agricultural land use contributes to potential particulate matter pollution from land preparation and seasonal burning. The urban-rural gradient is quite sharp; Pajo itself is a relatively small settlement, quickly transitioning to rural landscapes dominated by savannah and scrubland. The proximity to the sea means salt spray is a constant factor, but also provides some natural dispersion of pollutants. Air quality is further affected by prevailing wind patterns, which can transport pollutants from other parts of Timor or even neighbouring islands. The town’s location within the Indonesian archipelago means it’s susceptible to transboundary haze events during certain periods.

Pajo experiences a distinct wet and dry season, rather than traditional four seasons. Air quality is generally better during the wet season (roughly November to April) due to rainfall effectively scavenging pollutants from the atmosphere. Increased humidity, however, can also promote the formation of mould and allergens, impacting respiratory health. The dry season (May to October) presents the greatest air quality challenges. This period is characterised by stronger winds, often originating from Australia, which can carry dust and smoke from bushfires or agricultural burning. Temperature inversions, where a layer of warm air traps cooler air near the surface, are more common during the calmer mornings of the dry season, exacerbating pollutant concentrations. August and September are typically the months with the poorest air quality due to peak dryness and increased burning activity. Sensitive groups – children, the elderly, and individuals with pre-existing respiratory conditions – should limit strenuous outdoor activity during these months. Monitoring wind direction is crucial; winds from the south and east are more likely to bring haze. Staying indoors with windows closed and using air purifiers can offer protection. The transition periods between wet and dry seasons often see fluctuating air quality, requiring vigilance.