Rio Tinto Coal Australia is criticized for its health and safety conditions and lack of transparency at the Mount Thorley, Hunter Valley, and Bengalla coal mines; for harassing union members at its Bell Bay smelter; and for contamination of soil and groundwater in Arnhem Land.
Rio Tinto’s uranium mining activities in Australia come under criticism because they damage the environment and produce radioactive waste. In Western Australia, at the Ranger Uranium Mine, large quantities of radioactive water threaten to spill into land and the wetlands belonging to the Aboriginal Kakadu community. According to Reprisk, a total 100,000 litres of contaminated water has leaked from the tailing dams over the last 30 years.
 Reprisk: Most Controversial Mining Companies of 2011. p. 7.