Clean Water in Space (IMAGE) Iowa State University Caption Nicole Stott, a flight engineer on Expedition 21 of the International Space Station, tests the quality of drinking water using chemistry and procedures developed by Iowa State University and Ames Laboratory researchers Credit NASA photo. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.