EPA seeking input on National Aquatic Resource Survey to improve future assessments. Jan 01, 2021 A new report from the Environmental Protection Agency, National Rivers and Streams Assessment (NRSA) 2013-2014: A Collaborative Survey, provides a historical snapshot of water quality in U.S. rivers and streams. The agency is seeking input on all aspects of the design and implementation of the National Aquatic Resource Survey program to improve future assessments. The NRSA report includes a comparison between water quality metrics in 2013-2014 and 2008-2009, which generally show that water quality in rivers and streams across the country remained relatively unchanged between 2008 and 2014.