【省生态环境厅】上半年陕西汉丹江干流出境断面水质均达到Ⅰ类

Core Points - The water quality of 35 national control sections in the Han-Dan River Basin of Shaanxi from January to June 2025 has consistently met Class II standards or above, with 12 sections achieving Class I quality, accounting for 34.3% [1] - The Han River, the largest tributary of the Yangtze River, serves as a major water source for the South-to-North Water Diversion Project, with efforts focused on ensuring the water quality remains stable and meets standards [1] - Shaanxi has implemented strict source control measures, including prohibiting construction projects within one kilometer of the main river, and has achieved Class A discharge standards for wastewater from 31 county-level treatment plants [1] Environmental Restoration Efforts - Shaanxi is addressing historical environmental issues from mineral resource development, particularly focusing on the Baihe sulfur iron mine, with significant remediation efforts including the closure of 213 mine shafts and disposal of 158,000 cubic meters of waste [2] - The comprehensive treatment of antimony mines in the Dan River Basin has been completed, with a total of 51,490 cubic meters of antimony mine waste treated [2] Emergency Response System - The ecological environment department in Shaanxi has strengthened collaboration with water conservancy, fire, and meteorological departments to establish a comprehensive environmental emergency response system [2] - Real-time monitoring for heavy metals is conducted in the Han and Dan rivers, and emergency facilities have been constructed in high-risk areas to ensure environmental safety [2]