U.S. EPA Superfund Site Boundary Polygons

Polygons depict U.S. Environmental Protection Agency Superfund Site boundaries, representing the footprint of contaminated sites. The dataset is managed by regional geospatial professionals and remedial program managers, with national data refreshed weekly. Site boundaries are defined as the sum of all Operable Units and the current understanding of contamination extent.

Use Cases

• Map and analyze Superfund site boundaries for environmental justice studies using polygon geometries.
• Track changes in contamination extent by monitoring updates to site boundary polygons over time.
• Support remediation planning by integrating site boundary data with other geospatial layers for facilities management.
• Assess human health impact by correlating site boundary locations with demographic and environmental monitoring data.

Strengths

• Data is refreshed on a weekly basis through a national harvesting process.
• Managed by authoritative regional teams of geospatial professionals and remedial program managers.
• Polygons represent the current understanding of the full extent of contamination at each site.

Limitations

• Specific row counts, column details, and sample data are unavailable for assessment.
• Boundaries may change as site investigation progresses, requiring users to verify temporal accuracy.
• The dataset's license and precise temporal coverage are not specified.

Provenance

Source

U.S. Environmental Protection Agency

Collection Method

Managed by regional geospatial professionals and remedial program managers; national dataset harvested from regional data weekly.

Freshness

Last updated March 15, 2026; data is refreshed weekly.

Geography

United States