Agualva Air Quality Index (AQI)

Loading live AQI data...

Loading weather snapshot...

Loading historical AQI trends...

Agualva, nestled within the Lisbon Metropolitan Area of Portugal, presents a unique geographic context influencing its air quality. Situated approximately 15km north of Lisbon city centre, at coordinates 38.7700, -9.2988, the town occupies a relatively low-lying area within the wider Lisbon region, with an elevation generally below 100m. This proximity to the Tagus Estuary is significant; while the estuary provides a cooling influence and potential for dispersion of pollutants, it also creates conditions conducive to temperature inversions, trapping pollutants during calm periods. The surrounding landscape is a mix of urban sprawl, agricultural land – particularly vineyards and orchards further inland – and patches of pine forest, characteristic of the Portuguese landscape. Agualva itself has transitioned from a primarily rural area to a densely populated suburban centre, experiencing significant urban growth in recent decades. This expansion, coupled with the region’s industrial activity concentrated around Lisbon and further south, contributes to pollutant sources. The urban-rural gradient is noticeable, with air quality generally deteriorating closer to major roads and industrial zones. The prevailing winds, often from the northwest, can transport pollutants from the Atlantic Ocean and inland areas, impacting local air quality. Understanding this interplay of topography, land use, and meteorological patterns is crucial for addressing air quality challenges in Agualva.

Agualva’s air quality follows a distinct seasonal pattern, largely dictated by meteorological conditions. Summer (June-August) often sees improved air quality due to stronger prevailing winds from the Atlantic, aiding pollutant dispersion. However, increased temperatures can also promote the formation of ground-level ozone, a secondary pollutant, particularly during periods of intense sunshine and stagnant air. Autumn (September-November) brings a transition period, with decreasing temperatures and increased rainfall, generally leading to improved air quality. However, the onset of heating season begins to contribute to particulate matter pollution from wood burning. Winter (December-February) is typically the period of poorest air quality. Weak winds, frequent temperature inversions, and increased reliance on heating – including wood stoves – lead to pollutant accumulation. Fog, common in the Lisbon region during winter, exacerbates this issue by trapping pollutants near the ground. Spring (March-May) sees a gradual improvement as temperatures rise and rainfall increases, washing away accumulated pollutants. Sensitive groups, such as those with respiratory conditions, should be particularly cautious during winter months and periods of stagnant air. Avoiding strenuous outdoor activity during peak pollution times, and monitoring local air quality reports, is advisable. The wet season, generally from October to April, provides natural cleansing, but doesn’t eliminate all pollution risks.