EPA National Rivers and Streams Assessment Survey Results 2008-2019

Survey results from the EPA National Rivers and Streams Assessment for 2018-2019, 2013-2014, and 2008-2009 cycles. The data provides information on the ecological condition and key stressors of rivers and streams across all U.S. states. It includes collected data, geospatial shapefiles, and technical support documents for each survey period.

Use Cases

• Analyze trends in ecological condition metrics across the 2008-2009, 2013-2014, and 2018-2019 survey cycles for national and ecoregional scales.
• Assess the relationship between key stressors and ecological condition using the survey's stressor variables.
• Map survey results using the included geospatial shapefiles, particularly for the 2008-2009 and 2013-2014 surveys which contain watershed shapefiles.

Strengths

• Data spans three major survey cycles over more than a decade (2008-2019), enabling longitudinal analysis.
• Includes geospatial shapefiles for 2008-2009 and 2013-2014 surveys, allowing for spatial mapping and analysis.
• Comes with corresponding metadata files and technical support documents for each survey, aiding in data interpretation.

Limitations

• Watershed shapefiles are not included for the most recent 2018-2019 survey cycle, limiting spatial analysis for that period.
• The exact structure, number of rows, columns, and specific variables are not detailed in the provided input, requiring users to explore the files to understand the data's granularity.

Provenance

Source

United States Environmental Protection Agency (EPA) National Rivers and Streams Assessment.

Collection Method

Collaborative survey involving field crews, laboratory staff, and analysts from EPA, states, tribes, federal agencies, and universities.

Time Range

2008-2009, 2013-2014, and 2018-2019 survey cycles.

Freshness

Data covers surveys up to 2018-2019, with the dataset record last updated in January 2026.

Geography

Rivers and streams across all U.S. states.