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Tárrega, nestled in the heart of Catalonia, Spain, occupies a geographically significant position within the Priorat region, a landscape renowned for its vineyards and rugged terrain. Located at approximately 41.6469° N, 1.1392° E, the town sits at an elevation of around 550 meters (1804 feet) above sea level, contributing to a generally cooler climate compared to coastal areas. The surrounding landscape is dominated by rolling hills, terraced vineyards, and olive groves, characteristic of the Mediterranean agricultural belt. Tárrega’s location is inland, approximately 25 kilometers (15.5 miles) from the Serra de Prades Natural Park, a range that can influence local weather patterns and air circulation. The urban fabric of Tárrega is relatively compact, a traditional Catalan town with narrow, winding streets and a historic center. While not directly adjacent to a major river, it benefits from proximity to smaller streams and groundwater resources. The urban–rural gradient is gradual, with agricultural land seamlessly blending into the town's periphery. The Priorat region, while primarily agricultural, does have some light industrial activity related to wine production and processing, which can contribute localized emissions. The topography, with its hills and valleys, can create localized areas of stagnant air, particularly during periods of calm weather, potentially trapping pollutants. The prevailing winds generally flow from the west, influenced by the Serra de Prades, but their impact can be variable depending on the season and synoptic weather conditions. This inland location, combined with the surrounding agricultural and lightly industrial landscape, shapes Tárrega’s unique air quality profile.

Tárrega’s air quality experiences a distinct seasonal cycle dictated by the Mediterranean climate. Summers (June-August) are typically hot and dry, often characterized by prolonged periods of anticyclonic conditions. This leads to temperature inversions, where a layer of warm air traps cooler air near the ground, inhibiting vertical mixing and resulting in pollutant accumulation. Agricultural activities, including harvesting and the use of machinery, can also contribute to particulate matter during this period. Autumn (September-November) brings a gradual shift, with increased rainfall and more frequent wind events, which help to disperse pollutants, generally improving air quality. Winter (December-February) can be variable; while cooler temperatures can reduce photochemical smog formation, periods of calm weather and fog can lead to localized pollution episodes, particularly from residential heating. Spring (March-May) sees a return to more dynamic weather patterns, with frequent rainfall and wind, further aiding in pollutant dispersion. The months of July and August are generally those to be most cautious regarding outdoor activity, especially for vulnerable populations like children, the elderly, and individuals with respiratory conditions. During these months, limiting strenuous outdoor exercise and avoiding peak traffic times is advisable. The agricultural cycle also influences air quality; the burning of crop residues, while regulated, can occasionally occur, contributing to short-term spikes in particulate matter. Maintaining awareness of local weather forecasts and air quality reports is crucial for making informed decisions about outdoor activities throughout the year.