Stressed US Watersheds (IMAGE) University of Colorado at Boulder Caption Nearly one in 10 US watersheds is "stressed," with demand for water exceeding natural supply, according to a new, CIRES-led analysis of surface water in the United States. This map shows all stressed watersheds in the continental United States (1999-2007), with color indicating increasing levels of stress, from light green to red. Credit CIRES 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.