Water-carrying household appliance with: - at least one treatment chamber which can be closed and in which objects can be treated, - at least one water inlet into the treatment chamber , - at least one water outlet from the treatment chamber , - at least one pump , which is connected downstream of the water outlet , - water lines (L), - valve devices (V) and/or water flow adjustment means, - a coarse filter for water with a coarse filter inlet and with a coarse filter outlet for coarsely filtered water, the coarse filter being connected at its coarse filter inlet to the treatment chamber by means of a water line (L), - a fine filter for water with a fine filter inlet , with a fine filter outlet for finely filtered water and with a fine filtrate outlet for fine filtrate, the fine filter being connected at its fine filter inlet to the coarse filter outlet by means of a water line (L), - a drain outlet from the appliance , - at least one water reservoir , which is connected to the pump , the drain outlet and the coarse filter and the fine filter by means of water lines (L), wherein - a water line (L) leads away behind the coarse filter outlet and the fine filter outlet and a valve device (V) and/or a water flow adjustment means are provided therein, - the water reservoir is connected to the coarse filter outlet and to the fine filter outlet and is connected to the fine filter inlet , characterized in that : - the coarse filter has a coarse filtrate outlet for coarse filtrate, - a measuring chamber for examining water and/or filtrate is provided therein, - the measuring chamber has a measuring chamber inlet which is connected to the coarse filtrate outlet or to the fine filtrate outlet by means of water pipes (L) and a valve device (V) or a water flow adjustment means. - at least one treatment chamber which can be closed and in which objects can be treated, - at least one water inlet into the treatment chamber , - at least one water outlet from the treatment chamber , - at least one pump , which is connected downstream of the water outlet , - water lines (L), - valve devices (V) and/or water flow adjustment means, - a coarse filter for water with a coarse filter inlet and with a coarse filter outlet for coarsely filtered water, the coarse filter being connected at its coarse filter inlet to the treatment chamber by means of a water line (L), - a fine filter for water with a fine filter inlet , with a fine filter outlet for finely filtered water and with a fine filtrate outlet for fine filtrate, the fine filter being connected at its fine filter inlet to the coarse filter outlet by means of a water line (L), - a drain outlet from the appliance , - at least one water reservoir , which is connected to the pump , the drain outlet and the coarse filter and the fine filter by means of water lines (L), - a water line (L) leads away behind the coarse filter outlet and the fine filter outlet and a valve device (V) and/or a water flow adjustment means are provided therein, - the water reservoir is connected to the coarse filter outlet and to the fine filter outlet and is connected to the fine filter inlet , - the coarse filter has a coarse filtrate outlet for coarse filtrate, - a measuring chamber for examining water and/or filtrate is provided therein, - the measuring chamber has a measuring chamber inlet which is connected to the coarse filtrate outlet or to the fine filtrate outlet by means of water pipes (L) and a valve device (V) or a water flow adjustment means. <EOS>