Jamiltepec Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Jamiltepec, nestled in the heart of Oaxaca, Mexico, occupies a geographically significant position within the Valles Centrales region. Located at approximately 16.28° N, 97.82° W and an elevation of roughly 1,450 meters (4,757 feet) above sea level, the city benefits from a relatively mild, temperate climate characteristic of the highlands. The surrounding landscape is dominated by rolling hills and valleys, a mosaic of agricultural fields and scattered rural settlements, creating a distinct urban–rural gradient. To the west, the Sierra Madre del Sur mountains rise dramatically, influencing local wind patterns and contributing to occasional fog formation. While Jamiltepec itself lacks direct proximity to major rivers or lakes, it draws water from regional aquifers and benefits from occasional rainfall. The region’s economy is primarily agricultural, with maize, beans, and other crops being staples. This agricultural activity, while vital, can contribute to localized air pollution through the use of fertilizers and occasional field burning, particularly during the dry season. The city’s urban character is relatively small-scale, with a traditional layout and limited industrial presence. The nearest significant industrial zones are located further north, in the state capital of Oaxaca City, minimizing direct industrial air pollution impacts. However, vehicle emissions from increasing traffic and the burning of biomass for cooking and heating in surrounding rural communities can still influence local air quality. The terrain, with its gentle slopes and valleys, can sometimes trap pollutants, especially during periods of low wind speed.

Jamiltepec’s air quality experiences a distinct seasonal cycle dictated by its subtropical highland climate. The wet season, typically spanning from May to October, brings frequent rainfall and generally improved air quality. The consistent precipitation effectively washes away particulate matter and dilutes gaseous pollutants. Winds associated with passing weather systems also help disperse contaminants. However, periods of prolonged fog, common during the wet season, can trap moisture and contribute to localized humidity, potentially exacerbating respiratory issues for sensitive individuals. The dry season, from November to April, presents a different scenario. Reduced rainfall and lower humidity lead to a build-up of particulate matter, particularly during agricultural activities. Field burning, a traditional practice for land clearing and crop residue disposal, significantly contributes to elevated levels of smoke and particulate pollution during these months. Temperature inversions, where cooler air becomes trapped beneath a layer of warmer air, are also more frequent during the dry season, further hindering pollutant dispersion. February and March often see the highest concentrations of particulate matter. Individuals with respiratory conditions, such as asthma or COPD, should exercise caution during these months, limiting outdoor activity and monitoring local air quality reports. Children and the elderly are also particularly vulnerable. During the wetter months, while overall air quality is better, those with allergies should be mindful of increased pollen and mold counts. The transition months of April and May offer a period of improving air quality as rainfall increases and agricultural burning decreases.