Katanga, in the DRC, has been addressing long-term legacy issues at its refinery complex since Glencore took control in 2009. The complex is over 50 years old and had been maintained poorly by previous operators; for many years before Glencore’s investment, it had been discharging waste water without treatment. There was unrestricted discharge of effluents into local surface water.

Since 2009, Glencore has worked hard to address these legacy issues, including an investment of over $40 million installing more than 20km of piping infrastructure, a lime plant for neutralisation, a tailings disposal system, specialised pumps and water treatment plants.

Through this significant remedial work, all effluent has been fully treated before discharge since April 2012.