Trujillo Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Trujillo, Peru's third-largest city, occupies a strategic position in the Moche River valley on the arid coastal plain of northern Peru, approximately 560 kilometers north of Lima. Situated at an elevation of about 34 meters above sea level, the city is flanked by the Pacific Ocean to the west and the Andean foothills to the east, creating a distinctive urban–rural gradient where the metropolitan area transitions into agricultural zones and desert landscapes. This geography profoundly influences air quality through the valley's topography, which traps pollutants from local sources. Trujillo's urban character blends colonial architecture with modern expansion, featuring a dense central district surrounded by sprawling suburbs and industrial belts, particularly to the south and east where cellulose and forestry industries operate. Proximity to the ocean moderates temperatures but does little to disperse emissions, as the coastal desert climate lacks significant rainfall to cleanse the air. The surrounding landscape, including the nearby Chao and Virú valleys, contributes to regional pollution through agricultural dust and transport corridors, while the Moche River itself can become a conduit for airborne particulates during dry periods. This setting, combined with the city's role as a regional economic hub, results in a complex air quality dynamic where geographic confinement exacerbates the impact of anthropogenic sources.

In Trujillo's coastal desert climate, air quality follows a distinct seasonal pattern shaped by meteorological conditions and human activities. During the austral winter months of May through August, pollution peaks due to a combination of factors: temperature inversions form in the river valley, trapping vehicle exhaust, industrial emissions, and wood smoke from residential heating near the surface. These inversions are exacerbated by calm winds and persistent fog known as 'garúa,' which limits atmospheric mixing and visibility. Sensitive groups, such as children, the elderly, and those with respiratory conditions, should minimize outdoor exertion during this period, especially in the early mornings when pollutant concentrations are highest. In contrast, the summer months from December to March offer better air quality, as increased solar radiation and occasional breezes from the Pacific help disperse pollutants, though construction dust may still pose issues during dry spells. Autumn and spring serve as transitional seasons, with moderate pollution levels influenced by variable wind patterns and agricultural activities in the surrounding valleys. For optimal outdoor activities, visitors and residents should favor the summer months, while remaining cautious of sudden changes during El Niño events, which can bring heavy rains and landslides that temporarily clear the air but introduce other hazards. Year-round, monitoring local air quality reports and avoiding high-traffic areas during rush hours can help mitigate exposure.