Clean Water Act discharge permit · NPDES DE0000256
DELAWARE CITY REFINING CO., Delaware City, DE: NPDES DE0000256 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 13Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
DELAWARE CITY REFINING CO., held by Delaware City Refining Co., holds NPDES permit DE0000256. EPA’s file records it issued September 1, 1997 and expiring August 31, 2002. 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 REFINING CO. |
|---|---|
| Permittee as filed | Delaware City Refining Co. |
| NPDES ID | DE0000256 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 1, 1997 |
| Expiration date | August 31, 2002 |
| Address | Delaware City, DE 19706 |
| Subwatershed | Red Lion Creek-Delaware River (HUC 020402050703) |
| SIC | 2911 – Petroleum Refining |
| Other EPA IDs (FRS) | RCRA handler DED000621409; ICIS-AIR source DE0000001000300005 |
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
- 23Pollutants on file
- 13Under a numeric limit
- 23With a violation of any kind
- 9With 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 |
|---|---|---|---|---|---|
| Oil & Grease | 10 | 59 | 33 | November 30, 2024 | 537% over the limit |
| Solids, total suspended | 10 | 42 | 20 | March 31, 2015 | 475% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 28 | 20 | December 31, 2024 | 958% over the limit |
| Carbon, tot organic [TOC] | 10 | 23 | 14 | December 31, 2025 | 120% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 12 | 8 | December 31, 2023 | 52% over the limit |
| Sulfide, total [as S] | 8 | 9 | 5 | August 31, 2009 | 7,141% over the limit |
| Iron, total [as Fe] | 0 | 16 | 4 | February 28, 2026 | 100% over the limit |
| Chlorine, total residual | 4 | 6 | 4 | January 31, 2009 | 2,147,483,650% over the limit |
| pH | 2 | 13 | 3 | July 31, 2001 | |
| Flow, in conduit or thru treatment plant | 10 | 23 | 0 | ||
| Temperature, water deg. fahrenheit | 2 | 5 | 0 | ||
| Chromium, hexavalent [as Cr] | 4 | 4 | 0 | ||
| Chromium, total [as Cr] | 4 | 4 | 0 | ||
| Phenolic compounds, total | 4 | 4 | 0 | ||
| Nitrogen, total [as N] | 0 | 4 | 0 | ||
| Nitrogen, nitrite total [as N] | 0 | 4 | 0 | ||
| Nitrogen, nitrate total [as N] | 0 | 4 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 4 | 0 | ||
| Cyanide, free-water plus wastewaters | 0 | 4 | 0 | ||
| Vanadium, total [as V] | 0 | 4 | 0 | ||
| Aluminum, total [as Al] | 0 | 4 | 0 | ||
| Selenium, total [as Se] | 0 | 4 | 0 | ||
| Thermal Discharge | 0 | 2 | 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 DE0000256.
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 DE0000256 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.