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Jalpatagua, nestled in the Jutiapa department of Guatemala, occupies a strategically important position within the country’s southern highlands. Located at approximately 14.1333° latitude and -90.0167° longitude, the city sits at an elevation of roughly 1,200 meters (3,937 feet) above sea level, contributing to a generally cooler climate compared to lower-lying regions. The surrounding landscape is characterized by rolling hills and valleys, a typical feature of the Guatemalan highlands, transitioning into more agricultural plains towards the Pacific coastal region. This terrain influences local air circulation patterns; valleys can trap pollutants, while the hills can act as barriers, limiting dispersal. Jalpatagua’s proximity to agricultural zones, particularly those dedicated to coffee and sugarcane cultivation, introduces potential sources of particulate matter from burning practices, although regulations aim to mitigate this. The urban–rural gradient around Jalpatagua is relatively gradual, with smaller villages and farms interspersed within the broader landscape. While not directly adjacent to major rivers, the city benefits from seasonal rainfall, which can temporarily cleanse the air through precipitation. The absence of significant heavy industry within Jalpatagua itself means that regional industrial belts, potentially located further west towards the capital, are less of a direct influence on local air quality, though transboundary pollution remains a possibility. The city’s location within a relatively densely populated region of Guatemala means that regional transport patterns can also contribute to air pollution levels.

Jalpatagua experiences a tropical savanna climate, exhibiting distinct wet and dry seasons rather than the four traditional seasons. The dry season, typically spanning November through April, often sees a noticeable increase in air quality concerns. Reduced rainfall during this period means fewer opportunities for atmospheric cleansing through precipitation. Furthermore, the lower humidity can exacerbate the effects of particulate matter, as it doesn't readily settle out of the air. Temperature inversions, common during the cooler nights of the dry season, trap pollutants close to the ground, leading to localized concentrations. Agricultural burning, though regulated, can still occur, contributing to elevated particulate levels, particularly in February and March. The wet season, from May to October, brings frequent rainfall, which effectively washes pollutants from the atmosphere, resulting in significantly improved air quality. However, periods of intense rainfall can also lead to flooding, which can temporarily release pollutants from soil and water sources. Fog, particularly during the transition months of May and November, can also trap pollutants, creating localized air quality challenges. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, limiting prolonged outdoor activity during peak hours and monitoring for any respiratory discomfort. The increased humidity and rainfall of the wet season generally provide a more favourable environment for outdoor activities, though vigilance regarding potential flooding-related pollutants is advised.