To understand environmental pollution and assess water quality in Gonghu Bay of Taihu Lake, the eutrophication status and microcystins (MCs) occurrence were monitored monthly from December 2015 to November 2016. Moreover, the pollution of metals and antibiotics was investigated and assessed. In May 2016, the comprehensive trophic level index (∑TLI) at most sampling sites in Gonghu Bay were hypereutrophic, demonstrating that the eutrophication status in Gonghu Bay is still quite intense. The persistent and ubiquitous occurrence of MCs was observed in the water of Gonghu Bay throughout the monitoring period. Moreover, various metal elements and antibiotic compounds were found in the surface water of Gonghu Bay, in which arsenic (As) and sulfamethoxazole (SMX) respectively showed high risks. Overall, the water quality of eastern Gonghu Bay is affected mainly by eutrophication, while the antibiotic pollution level is higher in the southern part of Gonghu Bay. Continuous and long-term monitoring efforts are required to document the tendency of water quality change in Gonghu Bay and other parts of Taihu Lake to improve environmental management works.

为了了解环境污染并评估太湖公湖的水质，从2015年12月至2016年11月每月监测富营养化状况和微囊藻毒素（MC）的发生。此外，还对金属和抗生素的污染进行了调查和评估。2016年5月，共湖湾大部分采样点的综合营养水平指数（∑TLI）呈现富营养化状态，表明共湖湾的富营养化状况仍然很强。在整个监测期内，在共湖湾水域中均观察到MC的持续和普遍存在。此外，在共湖湾的地表水中发现了各种金属元素和抗生素化合物，其中砷（As）和磺胺甲恶唑（SMX）分别显示出高风险。总体，公主湖东部的水质主要受到富营养化的影响，而公主湖南部的抗生素污染水平较高。需要持续和长期的监测工作，以记录公湖和太湖其他地区水质变化的趋势，以改善环境管理工作。