Wasserski Duren

Water quantity: 35 ha (350,000 m²). The groundwater lake water is clean and begins to get warm when the first signs of summer appear. A small water source provides a constant supply of fresh water. Several thousand aquatic plants clean the natural swimming lake and filter the water organically, without harming the environment or the health of children and families who swim in the water. The self-cleaning biological process keeps the water in the natural swimming lake clear without the use of chemicals. Water quality meets EU standards for bathing water and was described as 'extremely suitable for swimming' in a 2004 assessment. Authorities check water quality twice a year .

The Düren bathing lake is a quarry lake which was filled with gravel and was originally an open pit brown coal mine which was listed in the relevant records as "Düren open pit". There is enough space for 10,000 swimmers here as the water surface covers 350,000 m². The lake is 11 m at its deepest point and covers 20,000 m² of land. Children and families can visit for a natural swimming experience and relax by the lake, which gradually stabilizes. There is a lot to entertain sports enthusiasts, but those who feel less energetic can go to the terrace of the Strandwerk restaurant for dining and cocktails.