Clean Water Act discharge permit · NPDES DE0021555
DELAWARE CITY WASTEWATER TREATMENT PLANT, New Castle, DE: NPDES DE0021555 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
DELAWARE CITY WASTEWATER TREATMENT PLANT, held by Delaware City Wastewater Treatment Plant, holds NPDES permit DE0021555. EPA’s file records it issued August 1, 2017 and expiring July 31, 2022. 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 | DELAWARE CITY WASTEWATER TREATMENT PLANT |
|---|---|
| Permittee as filed | Delaware City Wastewater Treatment Plant |
| NPDES ID | DE0021555 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 1, 2017 |
| Expiration date | July 31, 2022 |
| Address | New Castle, DE 19720 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | C&D Canal East-Delaware River (HUC 020402050705) |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler DED984076463 |
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
- 8Pollutants on file
- 6Under a numeric limit
- 8With a violation of any kind
- 2With 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 |
|---|---|---|---|---|---|
| Enterococci: group D, MF trans, M-E, EIA | 2 | 13 | 7 | April 30, 2026 | 99,999% over the limit |
| Chlorine, total residual | 0 | 84 | 3 | October 31, 2015 | 20% over the limit |
| Coliform, fecal general | 0 | 82 | 0 | ||
| BOD, 5-day, 20 deg. C | 5 | 5 | 0 | ||
| Solids, total suspended | 5 | 5 | 0 | ||
| pH | 2 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 2 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 1 | 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 DE0021555.
Inspections
EPA’s inspection file holds no inspection for NPDES DE0021555.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES DE0021555.
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, DE0021555.
Start the watch
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- One watershed — $2,990/year
- One state — $4,990/year
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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 DE0021555 there.
Nearby on the register
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- Every permit record in New Castle, A to Z
- Discharge permits in Delaware
- Every permit record in Delaware, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.