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Sangereng, located in the densely populated province of Jawa Barat, Indonesia, occupies a strategic position within the Greater Jakarta metropolitan area, approximately 20 kilometers southwest of central Jakarta. Situated at coordinates -6.2889, 106.7181, this urban center lies in the lowland plains of western Java, with an average elevation of just 50 meters above sea level, contributing to stagnant air conditions that trap pollutants. The city's geography is characterized by its proximity to the Ciliwung River basin, which flows northeast toward Jakarta Bay, though local water bodies are often polluted and provide minimal air-cleansing effects. Surrounded by a mix of residential developments, small-scale industries, and transitioning agricultural lands, Sangereng exists within an urban-rural gradient where nearby areas like Depok and Tangerang contribute to regional pollution through vehicular emissions, construction dust, and occasional agricultural burning. The terrain is predominantly flat with gentle slopes toward coastal areas, limiting natural ventilation. Its location in the Cekungan Bandung (Bandung Basin) extension means it experiences similar meteorological patterns to Jakarta, with air quality heavily influenced by the convergence of pollutants from the Jabodetabek megacity complex. The absence of significant topographic barriers allows pollution to accumulate, particularly during dry seasons when winds from the Java Sea bring marine aerosols that mix with urban emissions.

Sangereng's air quality follows a distinct seasonal pattern shaped by Indonesia's tropical monsoon climate, with pollution levels fluctuating based on rainfall, wind patterns, and human activities. During the dry season from May to September, reduced precipitation allows pollutants from vehicles, industries, and construction to accumulate, with peak pollution typically occurring in August and September when agricultural burning in surrounding regions adds particulate matter. The northeast monsoon brings drier air and occasional temperature inversions that trap pollutants near the ground, making early mornings particularly hazardous for outdoor exercise. The wet season from October to April sees improved air quality as frequent rainfall scrubs pollutants from the atmosphere, with November to January offering the cleanest air for outdoor activities like walking or cycling. However, occasional haze from regional forest fires can affect visibility and air quality even during rainy months. Sensitive groups, including children, the elderly, and those with respiratory conditions, should monitor local air quality reports and limit prolonged outdoor exposure during dry season peaks, especially on days with low wind speeds. Using air purifiers indoors and planning outdoor activities for late mornings after pollutants have dispersed can mitigate health risks year-round.