Clean Water Act discharge permit · NPDES MDR003710

VALLEY PROTEINS-DARLING INGREDIENTS LINKWOOD DIVISION, Linkwood, MD: NPDES MDR003710 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
4Pollutants under a numeric limit
0Pollutants with an effluent exceedance

VALLEY PROTEINS-DARLING INGREDIENTS LINKWOOD DIVISION, held by DARLING INGREDIENTS INC., holds NPDES permit MDR003710, which discharges to Transquaking River/Unknown Tributary. EPA’s file records it issued March 14, 2023 and expiring January 31, 2028. 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.

What the register holds for VALLEY PROTEINS-DARLING INGREDIENTS LINKWOOD DIVISION: its NPDES ID, its permit type and status, its dates, its address in Linkwood, Maryland, its receiving water, and 4 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MDR003710.

Identity

Facility as filed	VALLEY PROTEINS-DARLING INGREDIENTS LINKWOOD DIVISION
Permittee as filed	DARLING INGREDIENTS INC.
NPDES ID	MDR003710
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	March 14, 2023
Expiration date	January 31, 2028
Issuing agency	MARYLAND DEPARTMENT OF THE ENVIRONMENT
Address	Linkwood, MD 21835
Receiving water	TRANSQUAKING RIVER/UNKNOWN TRIBUTARY
Receiving water impaired	303(D) Listed
Subwatershed	Middletown Branch-Transquaking River (HUC 020801100101)
SIC	2077 – Animal And Marine Fats And Oils
Other EPA IDs (FRS)	ICIS-AIR source MD0000002401900029

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

4Pollutants on file
4Under a numeric limit
0With a violation of any kind
0With 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	6	0	0
Solids, total suspended	6	0	0
Nitrite + Nitrate total [as N]	6	0	0
Chemical Oxygen Demand [COD]	6	0	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MDR003710.

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 MDR003710.

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, MDR003710.

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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 MDR003710 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers the Clean Water Act discharge permit NPDES MDR003710, held by DARLING INGREDIENTS INC. for VALLEY PROTEINS-DARLING INGREDIENTS LINKWOOD DIVISION in Linkwood, MD, and discharging to Transquaking River/Unknown Tributary. The permit is listed as Effective and as a Minor Discharger, with 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance shown in the facts, and 4 pollutants under a numeric limit noted in the register.