滇黔桂交界万峰湖告别“难管”，10年从“黑水”变“饮水”

Core Viewpoint - The article highlights the successful implementation of cross-regional environmental protection regulations for the Wanfeng Lake, leading to significant improvements in water quality and ecological restoration in the area [1][3][5]. Group 1: Environmental Issues - Wanfeng Lake has faced severe ecological challenges due to unregulated fish farming and poor inter-regional governance, resulting in water quality deterioration and eutrophication [3][5]. - In 2017, inspections revealed that the fish farming area exceeded planned limits by 3.93 times, with daily feed inputs surpassing 5,000 tons, leading to a significant increase in nitrogen and dissolved oxygen levels [3]. Group 2: Legislative Actions - The "Wanfeng Lake Protection Regulations" were enacted on January 1, 2023, providing a legal framework for environmental protection in the region [3][5]. - Additional regulations from neighboring regions, including the "Guizhou Wanfeng Lake Protection Regulations" and "Qujing Wanfeng Lake Protection Regulations," were also implemented on the same date [3]. Group 3: Collaborative Efforts - A joint enforcement command was established in March 2022 among the three provinces, focusing on cross-regional environmental law enforcement and emergency response [5]. - As of now, significant actions have been taken, including the removal of 4.3 million square meters of illegal fish farming structures and the closure of three non-compliant enterprises [5]. Group 4: Water Quality Improvement - Following the implementation of protective measures, the water quality in Wanfeng Lake has improved to Class I, meeting drinking water standards, marking the best water quality recorded [3][5]. - By May 2025, the water quality maintained a Class II standard, with transparency exceeding 2.5 meters, indicating a gradual recovery of aquatic biodiversity [5].