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Kolontár, 4 October 2010. A dam at a Hungarian aluminium factory near Kolontár broke. Approximately 1.5 million cubic metres of alkaline red sludge and water were released with disastrous consequences: 10 people died, hundreds of hectares of agricultural land were contaminated. One year after these events, we collected information on the current environmental conditions in the area. As an ongoing effort, the Accident Prevention and Control Expert Group of the ICPDR continues its work to avoid or mitigate such disasters in the future.

Ajka, 15 November 2011. The redsludge accident of October 4 has generated a world-wide interest in the area of Ajka in Western Hungary. Since then, media attention has ceased. This article aims to provide an English summary of the measures that were taken to manage the accident since October 20.

Kolotar, 4 October 2010. The acute toxic risk deriving from the heavy metals in the red sludge is rather low, as their concentrations are rather low. However, the chronic toxicity threat is high.