Clean Water Act discharge permit · NPDES DC0000390
POTOMAC POWER RESOURCES BENNING GENERATING STATION, Washington, DC: NPDES DC0000390 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 29Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
POTOMAC POWER RESOURCES BENNING GENERATING STATION, held by Pepco Holdings, holds NPDES permit DC0000390. EPA’s file records it issued June 30, 2025 and expiring July 31, 2030. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | POTOMAC POWER RESOURCES BENNING GENERATING STATION |
|---|---|
| Permittee as filed | Pepco Holdings |
| NPDES ID | DC0000390 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | June 30, 2025 |
| Expiration date | July 31, 2030 |
| Address | Washington, DC 20019 |
| Subwatershed | Lower Anacostia River (HUC 020700100204) |
| Other EPA IDs (FRS) | RCRA handler DCR000500157 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 29Pollutants on file
- 29Under a numeric limit
- 1With a violation of any kind
- 1With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Benzo[b]fluoranthene | 2 | 1 | 1 | December 31, 2025 | 3,515% over the limit |
| pH | 4 | 0 | 0 | ||
| Solids, total suspended | 2 | 0 | 0 | ||
| Oil & Grease | 2 | 0 | 0 | ||
| Nitrogen, total [as N] | 2 | 0 | 0 | ||
| Phosphorus, total [as P] | 2 | 0 | 0 | ||
| Arsenic, total [as As] | 2 | 0 | 0 | ||
| Cadmium, total [as Cd] | 2 | 0 | 0 | ||
| Copper, total [as Cu] | 2 | 0 | 0 | ||
| Iron, total [as Fe] | 2 | 0 | 0 | ||
| Lead, total [as Pb] | 2 | 0 | 0 | ||
| Nickel, total [as Ni] | 2 | 0 | 0 | ||
| Zinc, total [as Zn] | 2 | 0 | 0 | ||
| Benzo[k]fluoranthene | 2 | 0 | 0 | ||
| Benzo[a]pyrene | 2 | 0 | 0 | ||
| Chrysene | 2 | 0 | 0 | ||
| Fluoranthene | 2 | 0 | 0 | ||
| Indeno[1,2,3-cd]pyrene | 2 | 0 | 0 | ||
| Pyrene | 2 | 0 | 0 | ||
| Benzo[a]anthracene | 2 | 0 | 0 | ||
| Dibenz[a,h]anthracene | 2 | 0 | 0 | ||
| DDT | 2 | 0 | 0 | ||
| Dieldrin | 2 | 0 | 0 | ||
| Heptachlor epoxide | 2 | 0 | 0 | ||
| PCB-1242 | 2 | 0 | 0 | ||
| PCB-1254 | 2 | 0 | 0 | ||
| PCB-1260 | 2 | 0 | 0 | ||
| Chlordane | 2 | 0 | 0 | ||
| Flow | 2 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES DC0000390.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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How we handle your data → Privacy
EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID DC0000390 there.
Nearby on the register
- Discharge permits in Washington
- Every permit record in Washington, A to Z
- Discharge permits in District of Columbia
- Every permit record in District of Columbia, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.