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The paper deals with the construction and performance data of the service module Zvezda water supply system of the International Space Station (ISS). The performance data at an initial phase of manned station functioning are provided. The data on humidity condensate and recovered water composition are reviewed. The water supply and demand balance are analyzed. The effective cooperation of international partners on part of water supply for the crew is shown.

The paper deals with the construction and performance data of the service module Zvezda water and oxygen supply systems of the International Space Station (ISS). The performance data at the first 14 months of manned station functioning are provided. The data of humidity condensate and recovered water compositions are reviewed. The water supply and demand balance are analyzed. The system of oxygen generation “Electron-VM” and its functioning results are reviewed. The effective cooperation of the international partners on part of life support is shown.

The paper deals with the performance data of the service module Zvezda integrated water supply system of the International Space Station (ISS) as of March 31, 2004. The water supply and demand balance are analyzed. It is shown that water recovery from humidity condensate has been especially important when water delivery by Space Shuttles was terminated. The SRV-K contribution in potable water supply for crew needs was up to 76%. The data of humidity condensate and recovered water compositions are reviewed. The effective cooperation of the international partners on part of life support is shown. Water recovery future prospects are discussed.