The National Wetland Condition Assessment (NWCA) 2011: A Collaborative Survey of the Nation’s Wetlands presents the results of the first national evaluation of the ecological condition of the nation’s wetlands. The NWCA is part of a broader effort by EPA and state, tribal, and federal partners to conduct national scale assessments characterizing the ecological condition of the nation’s waters. Under the National Aquatic Resource Survey (NARS) program, studies have been completed for wadeable streams (2004), lakes (2007), rivers and streams (2008-2009), and coastal waters (2010). The issuance of the NWCA 2011 report marks the completion of the first full-cycle of assessments by EPA and its partners under the NARS program.