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Marg‘ilon, nestled in Uzbekistan's fertile Fergana Valley at an elevation of approximately 490 meters above sea level, occupies a strategic position in Central Asia's most densely populated agricultural heartland. The city lies about 15 kilometers north of the regional capital Farg‘ona, surrounded by the majestic Tian Shan and Pamir-Alay mountain ranges that encircle the valley, creating a natural basin effect that profoundly influences air quality. This topography traps pollutants, particularly during temperature inversions common in autumn and winter. Marg‘ilon's urban character blends historic silk production heritage with modern textile manufacturing, situated within an intensively cultivated zone where cotton, fruits, and grains dominate the landscape. The city's proximity to the Sokh River and extensive irrigation canals provides some atmospheric moisture but doesn't significantly disperse pollutants. Positioned along the ancient Silk Road, Marg‘ilon's industrial belt has evolved from traditional crafts to include textile mills and food processing facilities, contributing to particulate matter emissions. The urban-rural gradient shows decreasing pollution toward surrounding villages, but agricultural burning practices in adjacent fields can temporarily worsen air quality. Being in a seismically active region, though not directly an air quality factor, shapes building practices that may influence indoor air environments. The valley's enclosed nature means pollutants from Farg‘ona and other nearby cities can accumulate, creating regional haze episodes that affect Marg‘ilon specifically during stagnant weather conditions.

Marg‘ilon's air quality follows distinct seasonal patterns shaped by the Fergana Valley's continental climate and agricultural calendar. Winter (December-February) brings the worst pollution as temperature inversions trap particulate matter from heating sources and occasional industrial emissions beneath a cold air layer, with January typically experiencing peak concentrations; sensitive groups should limit prolonged outdoor exposure during morning hours when inversions are strongest. Spring (March-May) sees gradual improvement as increasing temperatures and more frequent winds disperse pollutants, though March can still have poor air quality from lingering winter patterns and early agricultural preparations. Summer (June-August) offers the cleanest air with strong valley breezes and convective mixing, though occasional dust from dry fields and construction activity can cause short-term spikes; this is the optimal season for outdoor activities. Autumn (September-November) brings deteriorating conditions as temperatures drop, inversions return, and post-harvest agricultural burning in October-November significantly increases particulate pollution, creating hazardous episodes that warrant mask usage for vulnerable populations. Throughout the year, wind patterns from the surrounding mountains create local circulations that sometimes concentrate pollutants in specific city sectors. Fog is rare but can combine with pollution in late autumn. There's no monsoon influence, but occasional dust storms from the Kyzylkum Desert to the west can affect air quality, typically in spring.