EPA Superfund Site Polygon Features for Environmental Remediation

Polygon features depict important U.S. EPA Superfund site areas managed by regional geospatial professionals and remedial program managers. The dataset is refreshed weekly through the SEGS system to maintain a national view of contaminant remediation zones. It is reserved for site features best represented as geospatial polygons.

Use Cases

• Map and analyze polygon features representing Superfund site contaminant plumes or remediation areas.
• Track changes in site feature boundaries over time using the weekly refresh cadence of the SEGS system.
• Integrate polygon features with other environmental datasets using the 'Regulatory' and 'Facilities' tags for cross-analysis.
• Assess the spatial impact of remediation efforts on human health by studying the polygon-defined site features.

Strengths

• Managed by U.S. EPA regional teams of geospatial professionals and remedial program managers (RPMs), ensuring authoritative oversight.
• Refreshed on a weekly basis by the SEGS system, providing regular updates to the national dataset.
• Focuses on important Superfund site features specifically suited for polygon representation in geospatial analysis.

Limitations

• The specific number of polygon features (rows), column attributes, and total dataset size are unknown.
• Data is limited to the United States, with no international coverage for Superfund-type sites.
• The absence of detailed column metadata limits understanding of the specific attributes available for each polygon feature.

Provenance

Source

U.S. Environmental Protection Agency (EPA).

Collection Method

SEGS harvests regional data managed by EPA geospatial professionals and RPMs to refresh the national dataset.

Freshness

Last updated on 2026-03-22, with a weekly refresh cadence.

Geography

United States.