Exposure to ambient coarse and fine particulate matter (PM₁₀ and PM_2.5) causes premature death worldwide due to the nature of their particle size. It contains potentially hazardous elements (PHEs) and polycyclic aromatic hydrocarbons (PAHs). This study aims to quantify the particulate matter (PM) loads on the surface of soil in twenty-five different locations including residential and roadside areas of an urban area in Northeast India. This study shows that the 24h mean concentration of PM (121 ± 49 μg/m³ for PM_2.5 and 153 ± 45 μg/m³ for PM₁₀) exceeded more than three times the WHO’s air quality standard limit for both PM_2.5 (25 μg/m³) and PM₁₀ (50 μg/m³) indicating poor air quality in the urban area during monsoon season. The health risk assessment of PAHs and PHEs including mutagenic or carcinogenic potency was observed to be higher as compared to other studies carried out on road traffic emissions in a similar type of urban area. This study also provides a brief database on the deposition of PM on the soil surfaces due to wet-deposition that would help to increase public awareness in such type of urban area for the control of PM pollution and further remediation.

暴露于周围的粗颗粒和细颗粒物（PM ₁₀和PM _2.5）会由于其粒径的性质而导致全世界范围内的过早死亡。它包含潜在危险元素（PHE）和多环芳烃（PAH）。这项研究旨在量化印度东北部市区25个不同位置（包括住宅区和路边区域）土壤表面的颗粒物（PM）负荷。这项研究表明，PM的24小时平均浓度（121±49微克/米³为PM _2.5和153±45微克/米³为PM ₁₀）超过三倍以上世界卫生组织的空气质量标准限度两个PM _2.5（25微克/米³）和PM ₁₀（50μg/ m ³）表示季风季节市区空气质量差。与对类似城市地区道路交通排放进行的其他研究相比，PAH和PHE的健康风险评估（包括致突变或致癌效力）被认为更高。这项研究还提供了一个关于湿沉降在土壤表面上PM沉积的简短数据库，这将有助于提高公众对这类城市地区PM污染控制和进一步治理的认识。