Core Points - The new national standards aim to enhance water environment governance and ecological protection in the Chishui River and Danjiangkou Reservoir basins, improving the systematic and scientific management of these areas [1][5] Group 1: Chishui River Basin - The Chishui River is a significant tributary of the Yangtze River, known for its unique fish species and as a core area for high-quality liquor production, making its ecological protection crucial [1] - The current water pollutant discharge standards in the Chishui River basin lack specificity and applicability, necessitating the development of tailored standards to address urgent ecological quality improvement needs [2][4] - The proposed discharge standards categorize the river basin into strengthened protection areas, key control areas, and general control areas, with varying discharge limits based on ecological protection needs [3][4] Group 2: Danjiangkou Reservoir Basin - The Danjiangkou Reservoir serves as a water source for the South-to-North Water Diversion Project, maintaining good water quality but facing challenges with elevated nitrogen levels and unstable water quality in some rivers [5] - The proposed standards aim to improve the ecological environment quality and mitigate risks by establishing control measures for discharge sources and pollutants throughout the basin [5][6] - The standards for heavy metal discharges will have unified limits without gradation, reflecting the need for stringent control to ensure water quality safety [6]