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Benito Juárez, Veracruz, a small municipality nestled within the expansive state of Veracruz, Mexico, occupies a geographically significant position within the Gulf Coastal Plain. Located at approximately 20.8833° latitude and -98.2000° longitude, the city’s terrain is predominantly flat, characteristic of the coastal plain, with minimal elevation changes. This flatness, while facilitating urban development, also contributes to air quality challenges. Benito Juárez sits relatively close to the Papaloapan River, a major waterway influencing local humidity and weather patterns. The surrounding landscape is a blend of agricultural lands – primarily sugarcane and maize cultivation – and scattered rural communities, creating a gradual urban-rural gradient. The proximity to agricultural zones introduces potential sources of particulate matter from farming practices, including burning of crop residues, a common, albeit environmentally impactful, technique. Further inland, the terrain gradually rises towards the foothills of the Sierra Madre Oriental, though Benito Juárez itself remains within the flatter coastal zone. The Gulf of Mexico lies to the east, influencing prevailing winds and occasionally bringing in moisture and marine aerosols. While not directly adjacent to major industrial belts, the municipality benefits from its connection to the broader Veracruz state infrastructure, which includes transportation routes that can contribute to vehicular emissions. The relatively low elevation and flat topography limit atmospheric dispersion, potentially trapping pollutants and exacerbating local air quality issues. The city’s small size (population 17,618) means localized sources, like residential heating and small businesses, can have a disproportionate impact.

Benito Juárez experiences a tropical wet and dry climate, significantly impacting its air quality throughout the year. The dry season, typically spanning from March to May, often sees a noticeable increase in particulate matter. This is largely attributable to agricultural burning practices, as farmers prepare fields for planting. The lack of rainfall during this period allows these particles to linger in the atmosphere, reducing visibility and potentially impacting respiratory health. Conversely, the wet season, from June to October, brings frequent rainfall and higher humidity, naturally cleansing the air and reducing particulate concentrations. However, periods of intense rainfall can also lead to increased mold and fungal spores, affecting individuals with allergies or respiratory sensitivities. November and February represent transitional months, with fluctuating weather patterns. Temperature inversions, common during cooler nights in these months, can trap pollutants near the ground, leading to localized air quality degradation. Fog, particularly during the cooler months, can also exacerbate this effect by reducing atmospheric mixing. During the wet season, heavy downpours can temporarily improve air quality, but flooding can release pollutants from contaminated sites. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory conditions, should exercise caution during the dry season and be mindful of potential allergens during the wet season. Outdoor activities are generally more favorable during the wetter months, but vigilance regarding flood-related hazards is essential.