Flushing Nitrogen from Seawater-Based Toilets (IMAGE) King Abdullah University of Science & Technology (KAUST) Caption Flushed toilet water accounts for about 30 percent of domestic wastewater. Credit © 2020 Muhammad Ali 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.