Arrangement for cleaning ground water

An arrangement for cleaning ground water and ground region through which it passes, comprising transporting means for producing a liquid circulation between a well shaft extending in the region of contaminated ground water and the surrounding region;

• means for separating the well shaft into an upper region and a lower region;
• a water permeable shaft wall arranged at least locally for aspiration of water from one region and reintroduction of water into the ground from the other region;
• means for connecting the regions with one another and including a throughgoing tube in which said transporting means operate;
• and means forming at least one filter chamber containing filter material in the upper region and at least one filter chamber containing filter material in the lower region of the well shaft, said filter chambers extending across the entire free cross-section of the well shaft and extending at least in the upper well region upwardly over an upper edge of said water permeable shaft wall into an outwardly closed shaft region.