Another mining-linked pollution incident raises alarm over Zambia’s Kafue River

The Zambian government has ordered a copper miner to assess its infrastructure for weaknesses and clean up areas affected by pollution of the Kafue River, after residents downstream of the plant that processes the mine’s waste reported changes in the river’s color, taste, and smell on Sept. 28. The order also requires Konkola Copper Mines (KCM) to cover laboratory testing and related costs. The pollution was traced to a leaking pipe at KCM’s tailings leach plant and an overflow from a pollution control dam on the Mushishima Stream, a tributary of the Kafue. The company disputes allegations that it caused the pollution, saying it detected the river’s discoloration and reported the incident to local authorities. The incident has renewed concerns about recurring pollution in the Kafue, which Misozi Ngulube, director-general of Zambia’s Water Resources Management Authority (WARMA), has described as the country’s most polluted water body. In February 2025, the breach of a tailings dam operated by Sino-Metals Leach Zambia, also on the Kafue, released more than 50 million liters (13 million gallons) of toxic sludge into a tributary. The spill killed fish more than 100 kilometers (60 miles) downstream, damaged crops, and disrupted local water supplies. The government reported three cases of minor illness, but the event raised broader concerns for communities and wildlife. Ngulube told Mongabay that pollution in the Kafue comes largely from agriculture, industry, and mining. She said WARMA has acquired a water-quality monitoring system and is working toward real-time pollution detection. However, monitoring alone can’t…This article was originally published on Mongabay