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Despujols, a municipality in the province of Romblon, Philippines, occupies a geographically complex position within the Visayas archipelago. Situated at coordinates 12.5183°N, 122.0108°E, the town is characterised by a rugged, hilly terrain typical of Romblon Island. This island province is renowned for its marble quarries, and while Despujols isn’t a major quarrying centre itself, the wider provincial industry contributes to particulate matter in the air. The town slopes down towards the coastline, offering views of the Tablas Strait and the Sibuyan Sea. This coastal proximity introduces sea breezes that can both disperse and concentrate pollutants, depending on prevailing wind patterns. The population of approximately 15,940 is distributed across several barangays, indicating a relatively dispersed settlement pattern. Surrounding Despujols are areas of mixed agricultural land – primarily coconut plantations and rice paddies – and pockets of secondary forest. The urban-rural gradient is quite sharp, with limited heavy industry within the municipality itself. However, regional transport, primarily via sea, introduces emissions. The terrain influences air circulation, creating localised pockets where pollutants can accumulate, particularly in sheltered valleys. The island’s position also means it’s susceptible to inter-island pollutant transport.

Despujols experiences a distinct wet and dry season, heavily influenced by the southwest monsoon (habagat) and the northeast monsoon (amihan). Air quality generally improves during the wet season (roughly June to November) as rainfall effectively washes particulate matter from the atmosphere. However, increased humidity can also foster mould growth, impacting respiratory health. The habagat brings frequent rainfall and strong winds, dispersing pollutants, but also potentially carrying agricultural dust from surrounding areas. The dry season (December to May) sees a build-up of pollutants due to reduced rainfall and more stable atmospheric conditions. February and March are typically the driest months, and therefore experience the poorest air quality. Temperature inversions, where a layer of warm air traps cooler air below, can exacerbate pollution during calm mornings in the dry season. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during these periods. The amihan winds, while generally cleaner, can occasionally carry haze from regional wildfires. Monitoring wind direction is crucial; onshore winds concentrate pollutants, while offshore winds offer relief. Avoiding outdoor exertion during peak sunlight hours in the dry season is advisable.