Clean Water Act discharge permit · NPDES MDR003510

SILVER-TOP MANUFACTURING CO., INC., White Marsh, MD: NPDES MDR003510 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
2Pollutants under a numeric limit
0Pollutants with an effluent exceedance

SILVER-TOP MANUFACTURING CO., INC. holds NPDES permit MDR003510, which discharges to Bird River. EPA’s file records it issued January 21, 2020 and expiring December 31, 2024. 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	SILVER-TOP MANUFACTURING CO., INC.
Permittee as filed	SILVER-TOP MANUFACTURING CO., INC.
NPDES ID	MDR003510
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	January 21, 2020
Expiration date	December 31, 2024
Issuing agency	MARYLAND DEPARTMENT OF THE ENVIRONMENT
Address	White Marsh, MD 21162
Receiving water	BIRD RIVER
Receiving water impaired	303(D) Listed
Subwatershed	Whitemarsh Run-Bird River (HUC 020600030601)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

2Pollutants on file
2Under a numeric limit
2With 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
Nitrite + Nitrate total [as N]	1	4	0
Zinc, total [as Zn]	1	4	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MDR003510.

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 MDR003510.

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, MDR003510.

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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 MDR003510 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers NPDES permit MDR003510 held by SILVER-TOP MANUFACTURING CO., INC. in White Marsh, MD, which discharges to Bird River and is in the Whitemarsh Run-Bird River subwatershed (HUC 020600030601). The permit is listed as Effective, a Minor discharger class, and was issued January 21, 2020 with an expiration date of December 31, 2024. The page lists 2 pollutants on file, 2 under a numeric limit, 2 with a violation of any kind, and 0 with an effluent exceedance.