Marion Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Marion, Arkansas, nestled within the eastern edge of the state, occupies a geographically significant position in Crittenden County, part of the Memphis metropolitan area. The city’s coordinates (35.2035, -90.2059) place it on the western edge of the Mississippi Alluvial Plain, a remarkably flat and fertile landscape historically dominated by agriculture. The terrain is gently sloping, characteristic of the delta region, with an elevation around 223 feet above sea level. This low-lying topography, combined with its proximity to the St. Francis River and the larger Mississippi River system, influences local air quality. While not heavily industrialized *within* Marion itself, its close connection to Memphis, a major transportation and logistics hub, means it experiences some spillover effects from regional industrial activity and freight traffic. The surrounding landscape is a mix of agricultural fields – primarily soybeans, rice, and cotton – and increasingly, suburban development. The urban-rural gradient is relatively sharp, transitioning quickly from residential areas to farmland. This proximity to agricultural practices introduces potential for particulate matter from field work and pesticide drift, while the regional transportation network contributes to vehicle emissions. The flat terrain can also exacerbate pollution events by limiting atmospheric dispersion.

Marion’s air quality follows a distinct seasonal pattern, largely dictated by meteorological conditions and agricultural practices. Spring (March-May) often sees elevated particulate matter due to agricultural tilling and burning, coupled with increased pollen counts. Warm, humid conditions can trap pollutants near the ground. Summer (June-August) typically offers the best air quality, with prevailing southerly winds helping to disperse emissions and frequent rainfall acting as a natural scrubber. However, ozone formation can be a concern during prolonged heat waves. Autumn (September-November) brings a return of agricultural activity, with harvest operations contributing to particulate pollution. Temperature inversions become more frequent, trapping pollutants in the lower atmosphere. Winter (December-February) is generally characterized by stable air masses and reduced sunlight, leading to increased concentrations of pollutants from residential heating sources, particularly wood burning. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during spring and autumn, and be mindful of ozone alerts in summer. Monitoring wind patterns and avoiding peak agricultural times can further mitigate exposure. Fog, common in winter, can exacerbate particulate matter issues.