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Hathras, situated in the fertile plains of western Uttar Pradesh at an elevation of approximately 178 meters above sea level, occupies a strategic position within India's densely populated Gangetic basin. The city's geography is characterised by flat alluvial terrain with no significant natural barriers, allowing pollutants to accumulate and disperse across vast agricultural landscapes. Located roughly 120 kilometers southeast of Delhi and 40 kilometers north of Agra, Hathras lies within the National Capital Region's extended influence zone, experiencing spillover effects from the broader Indo-Gangetic Plain's pollution dynamics. The city's urban character blends traditional market town functions with emerging small-scale industrial activities, creating a distinct urban-rural gradient where agricultural fields transition abruptly into built-up areas. No major rivers flow directly through Hathras, though the region is crisscrossed by seasonal streams and irrigation canals that contribute to high humidity levels. This location within India's primary agricultural belt means surrounding fields dominate the landscape, with crop residue burning becoming a significant seasonal pollution source. The flat topography inhibits natural ventilation, while proximity to the industrial clusters of western Uttar Pradesh ensures a steady baseline of anthropogenic emissions. Hathras's position in this transportation corridor between major urban centers ensures persistent vehicle exhaust contributions, with road dust exacerbated by unpaved peripheral roads. The city's geography essentially creates a natural bowl effect where pollutants from local sources combine with regional haze, particularly during winter months when atmospheric conditions trap contaminants close to the ground.

Hathras experiences dramatic seasonal variations in air quality dictated by its humid subtropical climate and regional agricultural cycles. During winter (November-February), pollution reaches hazardous levels as temperature inversions trap pollutants near the surface, combining with dense fog to create persistent smog. This period coincides with post-harvest agricultural burning in surrounding fields and increased biomass burning for heating, making these months particularly dangerous for outdoor activity. Sensitive groups should avoid morning walks and strenuous exercise during these months, when cold waves further exacerbate respiratory distress. Spring (March-May) brings gradual improvement as temperatures rise and inversion layers weaken, though extreme heat in May can increase ozone formation from vehicle exhaust. The summer monsoon (June-September) provides the cleanest air as southwest winds sweep pollutants eastward and rainfall scrubs particulate matter from the atmosphere, making this the optimal season for outdoor activities despite flooding risks. Autumn (October) marks the transition to deteriorating conditions as agricultural burning commences and wind patterns shift. Throughout the year, morning hours typically show the worst pollution due to overnight accumulation and fog formation, while breezy afternoons offer temporary relief. The city's location ensures it experiences both locally generated pollution and regional haze transported from the broader Indo-Gangetic Plain, with meteorological factors determining whether contaminants disperse or concentrate over the urban area.