DOI: 10.7910/dvn/s2zwie
title: Extracted Data From: EPA National Rivers and Streams Assessment
title: National Rivers and Streams Assessment (NRSA), a part of the National Aquatic Resource Surveys (NARS)

description: This submission includes publicly available data extracted in its original form. Please reference the Related Publication listed here for source and citation information. 
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This submission includes publicly available data extracted in its original form. Data included are EPA National Rivers and Streams Assessment survey results from 2018-2019, 2013-2014, and 2008-2009 for all states. All collected data and geospatial shapefiles are uploaded in zipped files. Corresponding metadata files are included for each dataset. Technical support documents are included for each survey, as well. Watershed shapefiles were only included with the 2008-2009 and 2013-2014 surveys. The user interface of the EPA National Rivers and Stream Assessment Dashboard for the 2018-2019 survey accessed at https://riverstreamassessment.epa.gov/dashboard is documented in PDF form.
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&lt;blockquote&gt; “The National Rivers and Streams Assessment (NRSA) is a collaborative survey that provides information on the ecological condition of the nation’s rivers and streams and the key stressors that affect them, both on a national and an ecoregional scale.” &lt;/blockquote&gt;
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Quote from https://www.epa.gov/national-aquatic-resource-surveys/nrsa on 2025-12-18.
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&lt;blockquote&gt;“The National Rivers and Streams Assessment 2018-2019, 2013-2014, and 2008-2009 data were a result of the collective efforts of dedicated field crews, laboratory staff, data management and quality control staff, analysts and many others from EPA, states, tribes, federal agencies, universities, and other organizations. Please contact nars-hq@epa.gov with any questions.”&lt;/blockquote&gt; - 
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Quote from https://www.epa.gov/national-aquatic-resource-surveys/frequent-questions-about-data-national-aquatic-resource-surveys on 2025-12-18.
description: This submission includes publicly available data extracted in its original form. Please reference the Related Publication listed here for source and citation information.

EPA National Rivers and Streams Assessment data was downloaded by Candice Weber on 2025-12-14.
description: Terms and conditions were captured directly from from the EPA Disclaimers page (https://www.epa.gov/web-policies-and-procedures/epa-disclaimers) and are pasted below:
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