Clean Water Act discharge permit · NPDES MD0023523
NAVAL SUPPORT ACTIVITY (NSA) ANNAPOLIS WWTP, Annapolis, MD: NPDES MD0023523 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 15Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
NAVAL SUPPORT ACTIVITY (NSA) ANNAPOLIS WWTP, held by Naval Support Activity (NSA) Annapolis, holds NPDES permit MD0023523, which discharges to Severn River. EPA’s file records it issued September 24, 2015 and expiring October 31, 2020. 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 | NAVAL SUPPORT ACTIVITY (NSA) ANNAPOLIS WWTP |
|---|---|
| Permittee as filed | Naval Support Activity (NSA) Annapolis |
| NPDES ID | MD0023523 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Federal facility |
| Issued | September 24, 2015 |
| Expiration date | October 31, 2020 |
| Address | Annapolis, MD 21402 |
| Receiving water | SEVERN RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Whitehall Creek-Severn River-Chesapeake Bay (HUC 020600040203) |
| SIC | 9199 – General Government |
| Other EPA IDs (FRS) | RCRA handler MD1170090012; ICIS-AIR source MD0000002400300310 |
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
- 18Pollutants on file
- 15Under a numeric limit
- 16With a violation of any kind
- 7With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 10 | 109 | 37 | February 29, 2020 | 353% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 31 | 9 | March 31, 2018 | 50% over the limit |
| pH | 4 | 14 | 3 | September 30, 2020 | |
| Chlorine, total residual | 2 | 7 | 2 | January 31, 2015 | 1,100% over the limit |
| Phosphorus, total [as P] | 9 | 31 | 1 | November 30, 2005 | 17% over the limit |
| Coliform, fecal general | 2 | 29 | 1 | July 31, 2018 | 93% over the limit |
| Oxygen, dissolved [DO] | 4 | 9 | 1 | January 31, 2017 | 4% over the limit |
| BOD, 5-day, percent removal | 0 | 23 | 0 | ||
| Solids, suspended percent removal | 0 | 23 | 0 | ||
| Nitrogen, total [as N] | 8 | 18 | 0 | ||
| Nitrogen, organic total [as N] | 3 | 10 | 0 | ||
| Nitrogen, ammonia total [as N] | 3 | 10 | 0 | ||
| Nitrite + Nitrate total [as N] | 3 | 10 | 0 | ||
| Phosphorous, in total orthophosphate | 2 | 10 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 9 | 0 | ||
| Flow | 0 | 2 | 0 | ||
| Flow, total | 3 | 0 | 0 | ||
| Phosphate, ortho [as P] | 1 | 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 MD0023523.
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.
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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 MD0023523 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.