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Chota, nestled in the Cajamarca region of northern Peru, occupies a geographically significant position within the Andean highlands. Located at approximately -6.5614° latitude and -78.6486° longitude, the city sits at an elevation of around 2,350 meters (7,710 feet) above sea level, placing it firmly within a high-altitude environment. The surrounding landscape is dominated by the rugged terrain characteristic of the Peruvian Andes, with steep slopes, deep valleys, and scattered agricultural terraces. The Rio Chota, a vital waterway, flows nearby, providing a crucial source of irrigation for the region’s agricultural activities, primarily focused on coffee, sugarcane, and maize cultivation. This proximity to agricultural zones introduces potential sources of particulate matter, particularly during harvesting and processing seasons. The urban character of Chota is that of a regional hub, serving as a commercial and administrative center for the surrounding rural communities. The urban–rural gradient transitions rapidly from the city center to the extensive agricultural lands and smaller villages that dot the landscape. The city’s location within a valley can exacerbate air quality issues, particularly during periods of temperature inversion, where cool, dense air becomes trapped beneath a layer of warmer air, preventing pollutants from dispersing. While Chota isn't directly adjacent to major industrial belts, the transportation of agricultural goods and the operation of smaller-scale processing facilities contribute to localized pollution sources. The prevailing winds, often influenced by the Andean topography, play a crucial role in the dispersal (or lack thereof) of airborne contaminants.

Chota’s air quality experiences a distinct seasonal pattern dictated by its tropical highland climate, characterized by a wet and dry season rather than the traditional four seasons. The dry season, typically spanning from May to September, often sees a noticeable increase in particulate matter concentrations. This is largely attributable to increased agricultural activity – burning of fields for cultivation, dust from unpaved roads exacerbated by drier conditions, and emissions from smaller-scale processing of coffee and sugarcane. Temperature inversions are more frequent during this period, trapping pollutants within the valley. Conversely, the wet season (October to April) brings increased rainfall, which naturally helps to cleanse the atmosphere, washing away particulate matter and reducing overall pollution levels. However, periods of heavy fog, common during the wet season, can also trap pollutants close to the ground, creating localized pockets of poor air quality. Wind patterns shift seasonally; during the dry season, weaker winds contribute to stagnation, while the wet season brings more frequent, albeit often gentle, breezes that aid in dispersion. For sensitive groups – children, the elderly, and individuals with respiratory conditions – the months of July and August, during the peak of the dry season, should be approached with caution, limiting strenuous outdoor activity. The increased humidity during the wet season can exacerbate respiratory issues for some, so maintaining indoor air quality is also important. Agricultural workers are particularly vulnerable throughout the year and should utilize appropriate protective equipment when possible.