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Clean Water Act discharge permit · NPDES MDR003063

WMATA MONTGOMERY BUS DIVISION, Rockville, MD: NPDES MDR003063 discharge permit, effluent exceedances, inspections, penalties

WMATA MONTGOMERY BUS DIVISION, held by WASHINGTON METROPOLITAN AREA TRANSIT AUTHORITY, holds NPDES permit MDR003063, which discharges to Rock Creek. EPA’s file records it issued September 12, 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 WMATA MONTGOMERY BUS DIVISION: its NPDES ID, its permit type and status, its dates, its address in Rockville, Maryland, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MDR003063.

Identity

Facility as filedWMATA MONTGOMERY BUS DIVISION
Permittee as filedWASHINGTON METROPOLITAN AREA TRANSIT AUTHORITY
NPDES IDMDR003063
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedSeptember 12, 2023
Expiration dateJanuary 31, 2028
Issuing agencyMARYLAND DEPARTMENT OF THE ENVIRONMENT
AddressRockville, MD 20852
Receiving waterROCK CREEK
SubwatershedLower Rock Creek (HUC 020700100102)
SIC4111 – Local And Suburban Transit
Other EPA IDs (FRS)RCRA handler MDD981111636; ICIS-AIR source MD0000002403101950

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

EPA’s limits and effluent violation files hold no pollutant row for NPDES MDR003063.

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 MDR003063.

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, MDR003063.

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  • One permit holder — $99/month
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  • One state — $4,990/year
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How we handle your data → Privacy

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 MDR003063 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 the NPDES discharge permit MDR003063 held by WMATA MONTGOMERY BUS DIVISION in Rockville, Maryland, which discharges to Rock Creek and is shown as Effective with a minor discharger class. The page lists 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, with the permit issued September 12, 2023 and expiring January 31, 2028.