紫牛热点∣罐车向大夏河排放紫色不明液体？当地：正在按程序依法调查处理

Core Viewpoint - A video surfaced on social media showing a vehicle allegedly discharging wastewater into the Daxia River in Gansu's Linxia City, prompting an investigation by local authorities [1][3]. Group 1: Incident Details - The vehicle in question is a fish transport truck with a Sichuan license plate, which was found discharging a pinkish-purple liquid [3]. - The Linxia State Environmental Protection Bureau confirmed that the vehicle was located and that water quality samples were taken for testing [3][5]. Group 2: Investigation Findings - Initial investigations revealed that the truck's operators, Yang and Du, used potassium permanganate to clean the tank after transporting different fish species to prevent cross-contamination [5]. - Approximately 6 cubic meters of residual water was discharged into a drainage channel connected to the Daxia River, which was classified as general wastewater according to the "Comprehensive Wastewater Discharge Standards" [5]. - Environmental tests indicated that the surrounding water quality met the Class III standard for surface water, but the discharge was deemed a violation of the "Water Pollution Prevention and Control Law" of the People's Republic of China [5].