Abstract: Water vapor in the atmosphere is condensed on a condenser surface which is cooled either by a standard refrigeration system or by a thermoelectric system. Condensate water is treated by filtration and by the addition of a disinfectant, and the treated water is stored in a holding tank. Auxiliary water from a local source is treated similarly in a parallel system and stored in a second holding tank. As it is pumped from holding tank to a dispensing tap, treated water passes through a second water treatment which filters pyrogens and other bacterial residue from the water, and also removes residual disinfectant.