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Transportation Equipment — NPDES discharge permits in Maryland

Of the 3 permits in EPA's SIC 37 in MD, 1 went over a limit between 2025-10-01 and 2026-09-30 (Copper, total [as Cu]: 1; Zinc, total [as Zn]: 1). 0 are past the expiry date EPA's file holds; 3 have a renewal application overdue or due within 18 months. EPA's file of 2026-10-15.

FacilityLast 12 monthsPermit
U.S. COAST GUARD - BALTIMORE Y
MD0067300 · Ship Building And Repairing
Over a limit 7×: Copper, total [as Cu] (4×), Zinc, total [as Zn] (3×)Renewal application due Dec 2, 2026
BWI SPARROWS POINT, LLC
MD0001180 · Ship Building And Repairing
No value over a limitRenewal application due Aug 4, 2027
NORTHROP GRUMMAN SYSTEMS CORPORATION, ELKTON
MD0000078 · Space Propulsion Units And Parts
No value over a limitRenewal application due Feb 2, 2028

The record is EPA's ICIS-NPDES file of 2026-10-15: values filed against each limit between Oct 1, 2025 and Sep 30, 2026. No reports on file may be EPA's gap, not the facility's.

For programs and AI agents: this screen as JSON at /api/v1/permits?state=MD&sic=37, narrowed with &over_limit=true, &parameter=phosphorus or &renewal=due; or add https://passage-data.com/mcp as a remote MCP server (tool list_permits). Free, no key. llms.txt

From EPA's ECHO data, not the permit document itself: your permit is the final word. All states