EPA Wastewater Treatment Plants With NPDES Discharge Permits

A geospatial dataset from the EPA's Facility Registry Service identifies and locates Waste Water Treatment Plant facilities linked to the National Pollutant Discharge Elimination System. It contains facility identification and location information for plants subject to NPDES surface water discharge permits under the Clean Water Act. The U.S. Environmental Protection Agency maintains the data, which was last updated in April 2026.

Use Cases

• Map facility locations and their associated NPDES permit status for regional water quality assessments.
• Analyze the spatial distribution of regulated wastewater treatment plants for environmental justice studies.
• Link facility registry identifiers to ICIS-NPDES compliance and monitoring data for integrated reporting.

Strengths

• Data is integrated from EPA's national program systems and state/tribal records, providing a centralized source.
• Includes rigorous verification and data management procedures as per EPA documentation.

Limitations

• The dataset is restricted to internal EPA use only and is not publicly accessible.
• Sample size, row count, and specific column details are unknown from the provided information.

Provenance

Source

U.S. Environmental Protection Agency Facility Registry System (FRS).

Collection Method

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

Freshness

Last updated in April 2026, indicating regular maintenance.

Geography

United States, as it tracks facilities discharging into U.S. waters.