ATSDR Superfund Site Polygons with CIESIN Modifications

United States geospatial data for 1,572 National Priorities List (NPL) Superfund sites, representing locations considered for cleanup under CERCLA. The dataset was created by the CDC's ATSDR GRASP program using the best available site boundary information and later modified by Columbia University's CIESIN. It includes sites proposed, active, or deleted from the NPL as of October 25, 2013, derived from a larger set of 2,080 polygons dated May 26, 2010.

Use Cases

• Mapping the spatial extent of Superfund sites for environmental justice studies using polygon boundaries.
• Analyzing site attributes merged from ATSDR GRASP, EPA CERCLIS, and NPL databases for regulatory tracking.
• Assessing potential community exposure to contaminants by correlating site polygons with demographic data.

Strengths

• Contains a specific, curated set of 1,572 NPL sites, filtered from a larger source of 2,080 polygons.
• Integrates attributes from multiple authoritative sources: ATSDR GRASP, EPA CERCLIS, and EPA NPL databases.
• Polygons are georeferenced and represent the best available boundary data for sites where health assessments were requested.

Limitations

• The exact column schema and row count are unknown from the provided sources.
• Conflicting update dates exist: the underlying data is from 2010, but one platform lists a last updated date of 2026.
• Three NPL sites (two in the Virgin Islands, one in Guam) were excluded from the modified set.

Provenance

Source

Agency for Toxic Substances and Disease Registry (ATSDR) GRASP program, modified by Columbia University CIESIN.

Collection Method

Site boundary data created using the best available information for locations with requested health assessments or consultations.

Time Range

Snapshot as of October 25, 2013, derived from source data dated May 26, 2010.

Freshness

2010-05-26 00:00:00

Geography

United States (excluding three sites in the Virgin Islands and Guam).