In order preserve drinking water, a rainwater harvesting system has been put into operation at Erlachplatz. The collected rainwater will be recycled and hygienically processed in a 50,000 litre cistern and put to use for toilets, washing machines and watering the garden. The rainwater flows through filters, sifters and a brand new disinfection-system, and can thus be used instead of drinking water as a resource saving and environmentally friendly solution. Unfortunately, this isn’t possible everywhere: but we think it’s a good start!