Clean Water Act discharge permit · NPDES MD0003247
DARLING INGREDIENTS - LINKWOOD, Linkwood, MD: NPDES MD0003247 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
DARLING INGREDIENTS - LINKWOOD, held by Valley Proteins, Inc. (Formerly Allen Biotech,LLC)_JCR ENTERPRISES, INC., holds NPDES permit MD0003247, which discharges to Transquaking R. EPA’s file records it issued March 1, 2001 and expiring February 28, 2006. 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 | DARLING INGREDIENTS - LINKWOOD |
|---|---|
| Permittee as filed | Valley Proteins, Inc. (Formerly Allen Biotech,LLC)_JCR ENTERPRISES, INC. |
| NPDES ID | MD0003247 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | March 1, 2001 |
| Expiration date | February 28, 2006 |
| Address | Linkwood, MD 21835 |
| Receiving water | TRANSQUAKING R |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Whitehorn Creek-Thorn Creek (HUC 020700010304) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 21Pollutants on file
- 13Under a numeric limit
- 21With a violation of any kind
- 11With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 8 | 160 | 84 | July 31, 2026 | 99,999% over the limit |
| Phosphorus, total [as P] | 4 | 107 | 47 | April 30, 2026 | 1,656% over the limit |
| Nitrogen, total [as N] | 4 | 131 | 34 | July 31, 2026 | 615% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 104 | 27 | September 30, 2025 | 2,518% over the limit |
| Coliform, fecal general | 16 | 110 | 11 | April 30, 2024 | 700% over the limit |
| E. coli | 0 | 12 | 6 | July 31, 2026 | 99,999% over the limit |
| Solids, total suspended | 8 | 65 | 5 | September 30, 2021 | 178% over the limit |
| pH | 2 | 18 | 4 | May 31, 2026 | |
| Oil & Grease | 8 | 78 | 1 | April 30, 2022 | 77% over the limit |
| Chlorine, total residual | 1 | 43 | 1 | August 31, 2018 | 99,999% over the limit |
| Oxygen, dissolved [DO] | 1 | 11 | 1 | August 31, 2011 | 100% over the limit |
| Nitrogen, Kjeldahl, total [as N] | 0 | 130 | 0 | ||
| Solids, total dissolved | 14 | 50 | 0 | ||
| Nitrogen, nitrate total [as N] | 14 | 42 | 0 | ||
| Ammonia nitrogen, total, [as N] 30 day | 0 | 41 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 9 | 0 | ||
| Temp. diff. between samp. & upstrm deg. F | 0 | 9 | 0 | ||
| Nitrate nitrogen, dry weight | 0 | 9 | 0 | ||
| Temperature, water deg. fahrenheit | 0 | 1 | 0 | ||
| Nitrogen, organic total [as N] | 0 | 1 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 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 MD0003247.
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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Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.