Clean Water Act discharge permit · NPDES MD0021636
CAMBRIDGE WWTP, Cambridge, MD: NPDES MD0021636 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 14Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
CAMBRIDGE WWTP, held by CITY OF CAMBRIDGE, holds NPDES permit MD0021636, which discharges to Choptank River. EPA’s file records it issued July 1, 2016 and expiring July 31, 2021. 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 | CAMBRIDGE WWTP |
|---|---|
| Permittee as filed | CITY OF CAMBRIDGE |
| NPDES ID | MD0021636 |
| 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 | July 1, 2016 |
| Expiration date | July 31, 2021 |
| Issuing agency | MARYLAND DEPARTMENT OF THE ENVIRONMENT |
| Address | Cambridge, MD 21613 |
| Receiving water | CHOPTANK RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Bolingbroke Creek-Choptank River (HUC 020600050502) |
| Other EPA IDs (FRS) | RCRA handler MDD980553374 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 14Pollutants on file
- 14Under a numeric limit
- 8With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 4 | 39 | 31 | July 31, 2009 | 200% over the limit |
| Solids, total suspended | 6 | 4 | 4 | October 31, 2001 | 387% over the limit |
| Oxygen, dissolved [DO] | 3 | 2 | 2 | October 31, 2012 | 42% over the limit |
| Coliform, fecal general | 1 | 2 | 2 | January 31, 2015 | 164% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 1 | 1 | October 31, 2001 | 29% over the limit |
| Chlorine, total residual | 1 | 1 | 1 | September 30, 2009 | 60% over the limit |
| Nitrogen, total [as N] | 4 | 17 | 0 | ||
| Nitrogen, organic total [as N] | 1 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Flow, total | 2 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 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 MD0021636.
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, MD0021636.
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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 MD0021636 there.
Nearby on the register
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- Every permit record in Cambridge, A to Z
- Discharge permits in Maryland
- Every permit record in Maryland, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.