EPA FRS AIR_MAJOR: Major Air Pollution Facility Registry

A subset of EPA's Facility Registry Service (FRS) containing location and identification information for facilities classified as major dischargers of air pollutants. The data is integrated from EPA's Integrated Compliance Information System for Air (ICIS-Air) and state, tribal, and federal sources. It provides a centrally managed source of information on stationary sources regulated by EPA, state, and local agencies.

Use Cases

• Mapping major air pollution sources based on facility location data.
• Analyzing compliance and enforcement patterns for stationary air pollution sources.
• Identifying facilities exceeding major source thresholds or emitting over 100 tons/year.
• Integrating facility data from multiple regulatory systems for a unified view.
• Verifying facility identification and geospatial location for environmental reporting.

Strengths

• Data is integrated from EPA's national program systems, other federal agencies, and state and tribal records.
• Facilities are classified using specific criteria, including emissions above major thresholds or exceeding 100 tons/year.
• Location and facility identification information is provided via a web feature service.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Freshness should be verified as the last update timestamp is 2026-03-23.

Provenance

Source

U.S. Environmental Protection Agency

Collection Method

Integrated from EPA's ICIS-Air system and other federal, state, and tribal master facility records.

Freshness

Last updated 2026-03-23 14:31:33.536220

Geography

United States