U.S. EPA Superfund Operable Unit Boundaries for Site Remediation

A GIS dataset containing polygon boundaries for U.S. Environmental Protection Agency Superfund Operable Units. Operable Units represent discrete portions of a site where assessment and response actions are managed, which can be geographical areas, distinct media, or releases. The dataset is managed by regional EPA teams and harvested weekly to refresh national services.

Use Cases

• Mapping geographical portions of Superfund sites based on operable unit polygons.
• Analyzing site-specific remediation actions associated with distinct media or releases.
• Building composite site boundaries using operable unit polygons as building blocks.
• Identifying areas of overlapping environmental concern where operable units represent distinct media.

Strengths

• Data is refreshed on a weekly basis from regional sources.
• Polygons are defined by specific CERCLA regulations (40 C.F.R. § 307.14).
• Managed by regional teams of geospatial professionals and remedial program managers.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

U.S. Environmental Protection Agency

Collection Method

Harvested from regional EPA data sources by SEGS on a weekly basis.

Time Range

null

Freshness

Last updated 2026-03-22 13:51:22.888492; freshness should be verified.

Geography

United States