Clean Water Act discharge permit · NPDES MD0021491
SENECA WATER RESOURCE RECOVERY FACILITY, Germantown, MD: NPDES MD0021491 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 16Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
SENECA WATER RESOURCE RECOVERY FACILITY, held by SENECA WWTP, holds NPDES permit MD0021491, which discharges to Seneca Creek. EPA’s file records it issued September 14, 2010 and expiring September 30, 2015. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SENECA WATER RESOURCE RECOVERY FACILITY |
|---|---|
| Permittee as filed | SENECA WWTP |
| NPDES ID | MD0021491 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 14, 2010 |
| Expiration date | September 30, 2015 |
| Issuing agency | MDE |
| Address | Germantown, MD 20874 |
| Receiving water | SENECA CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Great Seneca Creek (HUC 020700080802) |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler MDD982579427; ICIS-AIR source MD0000002403102063 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 16Pollutants on file
- 16Under a numeric limit
- 5With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 8 | 5 | 2 | December 31, 2005 | 33% over the limit |
| Phosphorus, total [as P] | 13 | 3 | 1 | October 31, 2004 | 3% over the limit |
| Chlorine, total residual | 2 | 1 | 1 | December 31, 2004 | 150% over the limit |
| Nitrogen, total [as N] | 17 | 2 | 0 | ||
| Flow, total | 3 | 2 | 0 | ||
| BOD, 5-day, 20 deg. C | 16 | 0 | 0 | ||
| Solids, total suspended | 8 | 0 | 0 | ||
| pH | 4 | 0 | 0 | ||
| Nitrogen, organic total [as N] | 4 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 4 | 0 | 0 | ||
| Copper, total recoverable | 4 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| Phosphorous, in total orthophosphate | 4 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 0 | 0 | ||
| E. coli | 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 MD0021491.
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MD0021491.
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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 MD0021491 there.
Nearby on the register
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- Every permit record in Maryland, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.