山东实现县际流域横向生态补偿全覆盖，黄河干流山东段全线稳定保持Ⅱ类水质

Core Viewpoint - The article highlights the significant improvements in water quality in the Yellow River basin, particularly in Shandong province, due to the implementation of inter-county ecological compensation mechanisms, leading to a stable Class II water quality in the main stream of the Yellow River in Shandong [1][6]. Group 1: Water Quality Improvement - The water quality in the East Ping Lake has been continuously improving, significantly impacting the safety of water quality downstream in the Yellow River [2][3]. - Recent monitoring shows that the water quality at the Dai Village Dam has stabilized at Class III, occasionally reaching Class II standards, with a notable reduction in organic pollution indicators such as COD and total phosphorus [4][5]. - The inter-county ecological compensation agreements have unified pollution control and ecological protection efforts, resulting in a more proactive approach to environmental management [5][6]. Group 2: Ecological Compensation Mechanism - The inter-county ecological compensation mechanism has led to the removal of 126,000 acres of fish farming nets and the withdrawal of over 2,100 unregistered boats, contributing to ecological restoration [5]. - Shandong province has achieved full coverage of inter-county ecological compensation agreements across all 133 counties with cross-border rivers, involving 301 monitoring points [6]. - The province aims for 79.1% of its national control monitoring points to meet good water quality standards by 2024, with a continuous effort to eliminate Class V and below water bodies [6].