Investigated the pollution levels, distributions, compositions, sources and influencing factors in dissolved phases, suspended particular matters and sediments of Dishui Lake, the results showed that average concentrations of total PAHs in those medium were 16.78ng/L, 33.02ng/gand 40.98ng/g respectively. Statistical analyses suggested that Water pH and conductivity was correlated to the concentrations of low molecular weight PAHs in dissolved phases, while total organic carbon (TOC) was correlated to the concentrations of high molecular weight PAHs in sediments. PAHs in dissolved phases were mainly from high temperature combustion of straw, wood and coal. There are also some samples showed the oil source. Combustion and oil spill were the sources of PAHs in suspended particular matters. While both combustion and petrogenic inputs were the sources of PAHs in sediments. By measuring the concentrations of PAHs in the crucian carp muscles, eggs and gills,we found the concentrations of PAHs in the gills of crucian carp were the highest, followed by the meat and roes. Compared to concentrations of PAHs in the fishes of other areas in the world, the concentrations ranges was in the lower level, but some samples with a higher BaP equivalent concentrations than the EPA regulations.%通过测定滴水湖水体、颗粒物和沉积物体系 PAHs 含量，探讨其分布与组成特征、影响因素及污染来源.结果表明，滴水湖水体中溶解态、颗粒态和沉积物中 PAHs 平均浓度分别为16.78ng/L、33.02ng/g 和40.98ng/g.统计分析表明，水体酸碱度以及电导率与溶解态低环PAHs之间存在显著相关性，总有机碳(TOC)与沉积物中高环PAHs浓度之间存在显著相关性.溶解态的PAHs来源主要表现为草、木和煤的高温燃烧，部分样点表现为石油源；颗粒态PAHs则主要表现为高温燃烧以及石油泄漏源；而沉积物PAHs的来源则较复杂，除了草、木及煤的高温燃烧源和石油泄漏源，还有部分样点表现为石油的高温燃烧源.鲫鱼肌肉、卵部以及鳃部 PAHs 含量的测定结果表明，鲫鱼不同部位对PAHs的富集能力具有较大差异.鳃部总PAHs含量最高，其次为鲫肉部分，鲫卵所含PAHs浓度最少.与国内外其他研究相比较，滴水湖鲫鱼体内PAHs含量处于较低水平，但鲫鱼部分样品的BaP等当量浓度略高于EPA规定的可食性生物器官中PAHs含量的上限值.
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