A summary of work accomplished under Technical Task Agreement by the Marshall Space Flight Center (MSFC) documents activities regarding the Environmental Control and Life Support Systems (ECLSS) of the International Space Station (ISS) program. These MSFC activities were in-line to the designing, the development, the testing, and the flight of ECLSS equipment. MSFC's unique capabilities for performing integrated system testing and analyses, and its ability to perform some tasks cheaper and faster to support ISS program needs are the basis for the Technical Task Agreement activities. Tasks were completed in the Water Recovery Systems, Air Revitalization Systems, and microbiology areas. The results of each task is described in this summary report. Minton-Summers, S. and Ray, C. D. Marshall Space Flight Center INTERNATIONAL SPACE STATION; WATER RECLAMATION; PERFORMANCE TESTS; MATHEMATICAL MODELS; ENVIRONMENTAL CONTROL; LIFE SUPPORT SYSTEMS; SPACECRAFT ENVIRONMENTS; AIR PURIFICATION; SYSTEMS INTEGRATION; PUMPS; WATER QUALITY; URINE; AIR CONDITIONING EQUIPMENT; TRACE CONTAMINANTS; CARBON DIOXIDE; CHARCOAL; TEMPERATURE EFFECTS; NITROGEN; ADSORPTION; MICROBIOLOGY; DESIGN ANALYSIS; ION EXCHANGING; OXYGEN PRODUCTION...