EPA National Rivers and Streams Assessment: Water Condition Estimates 2013-2019

United States Environmental Protection Agency data on the percentage of river and stream miles in good ecological condition. The dataset includes the 2018-19 national estimate and the change in condition between the 2013-14 and 2018-19 survey periods, with results based on indicators for nutrients, biology, and human health. Data was extracted from the EPA's public National Rivers and Streams Assessment Dashboard.

Use Cases

• Analyze national trends in river and stream health based on the change between 2013-14 and 2018-19 surveys.
• Assess condition for specific water quality indicators like nitrogen, phosphorus, and biological metrics mentioned in the description.
• Compare regional benchmarks for ecological indicators against national benchmarks for acidification and salinity.
• Evaluate the detection and condition status of human health indicators such as microcystins and enterococci.

Strengths

• Data originates from the authoritative U.S. EPA National Aquatic Resource Surveys.
• Results include 95% confidence intervals, providing statistical reliability for the estimates.
• Covers two major survey periods (2013-14 and 2018-19), enabling change-over-time analysis.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and specific file formats are unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

United States Environmental Protection Agency (EPA)

Collection Method

Extracted from the EPA's National Rivers and Streams Assessment Dashboard.

Time Range

2013-14 to 2018-19

Freshness

Metadata last updated 2026-04-21 16:39:20; freshness should be verified.

Geography

National (United States)