Tecomán Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Tecomán, nestled in the state of Colima, Mexico, occupies a geographically significant position within the southwestern Pacific coastal plain. Located at approximately 18.9089° N, -103.8747° W, the city sits at a relatively low elevation, averaging around 100 meters above sea level, contributing to a warm, humid climate. The surrounding landscape is a blend of fertile agricultural lands, primarily dedicated to coffee, mango, and citrus cultivation, and gently sloping hills transitioning into the volcanic highlands of the Sierra de Colima mountain range to the east. This proximity to both agricultural zones and the mountains plays a crucial role in Tecomán’s air quality profile. The city’s location along the Balsas River provides a vital water source and influences local humidity levels. The urban fabric of Tecomán is characterized by a moderate urban–rural gradient; while it functions as a regional commercial hub for the surrounding agricultural communities, it retains a relatively small urban footprint. Industrial activity is present, primarily focused on food processing related to the agricultural output, and smaller-scale manufacturing. The prevailing winds, often influenced by the Pacific Ocean and the Sierra de Colima, can trap pollutants, particularly during periods of reduced wind speed. The topography, with the mountains to the east, can create localized inversions, especially during cooler months, exacerbating air quality challenges by preventing vertical mixing of pollutants. The coastal location also means the city is susceptible to marine influences, including salt spray and occasional episodes of dust transported from the Pacific.

Tecomán’s air quality experiences a distinct seasonal pattern dictated by its tropical climate, characterized by a wet and dry season rather than four traditional seasons. The dry season, typically spanning from March to May, often presents the most significant air quality concerns. Reduced rainfall and increased temperatures lead to higher concentrations of particulate matter, stemming from agricultural burning practices used for land clearing and crop residue management. The lack of rainfall limits the natural cleansing effect of precipitation, allowing pollutants to accumulate. Furthermore, the drier air promotes the formation of photochemical smog, particularly during periods of intense solar radiation. Conversely, the wet season (June to October) brings relief, with frequent rainfall washing away pollutants and increasing atmospheric humidity, which can reduce the formation of particulate matter. However, heavy rainfall events can occasionally lead to increased levels of mold spores and allergens. November and February represent transitional periods, with variable weather patterns. Temperature inversions are more common during these months, particularly in the early morning hours, trapping pollutants near the ground. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, limiting outdoor activities during peak sunlight hours and avoiding areas with visible smoke. Agricultural workers should be particularly vigilant about respiratory protection during burning periods. Maintaining indoor air quality through proper ventilation and air filtration can also provide some protection.