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Clean Water Act discharge permit · NPDES MDR003667

SMI - WINCHESTER BLDG., Frederick, MD: NPDES MDR003667 discharge permit, effluent exceedances, inspections, penalties

SMI - WINCHESTER BLDG., held by SMI SIGN SYSTEMS, INC., holds NPDES permit MDR003667, which discharges to Potomac River. EPA’s file records it issued March 12, 2024 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.

Identity

Facility as filedSMI - WINCHESTER BLDG.
Permittee as filedSMI SIGN SYSTEMS, INC.
NPDES IDMDR003667
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedMarch 12, 2024
Expiration dateJanuary 31, 2028
Issuing agencyMARYLAND DEPARTMENT OF THE ENVIRONMENT
AddressFrederick, MD 21703
Receiving waterPOTOMAC RIVER
Receiving water impaired303(D) Listed
SubwatershedTuscarora Creek-Potomac River (HUC 020700080401)
SIC3399 – Primary Metal Products

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Nitrite + Nitrate total [as N]190
Zinc, total [as Zn]190

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MDR003667.

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES MDR003667.

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 MDR003667 there.

Nearby on the register

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

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES MDR003667 for SMI - WINCHESTER BLDG. in Frederick, MD, held by SMI SIGN SYSTEMS, INC. and discharging to the Potomac River, with a permit status of Effective and a Minor discharger class. The page lists 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, with the permit issued March 12, 2024 and expiring January 31, 2028.