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Metal Mining — NPDES discharge permits in Missouri

Of the 12 permits in EPA's SIC 10 in MO, 6 went over a limit between 2025-10-01 and 2026-09-30 (Lead, total recoverable: 5; Cadmium, total recoverable: 3; Copper, total recoverable: 3). 5 are past the expiry date EPA's file holds; 1 has a renewal application overdue or due within 18 months. EPA's file of 2026-10-15.

FacilityLast 12 monthsPermit
Missouri Mining Investments, LLC
MO0098752 · major · Lead And Zinc Ores
Over a limit 93×: Nickel, total recoverable (18×), Copper, total recoverable (18×), Lead, total recoverable (14×)Expires Jun 30, 2029
The Doe Run Company
MO0000086 · major · Lead And Zinc Ores
Over a limit 10×: Zinc, total recoverable (2×), Cadmium, total recoverable (2×), Lead, total recoverable (2×)Expires Jun 30, 2030
The Doe Run Resource Corporation
MO0001856 · major · Lead And Zinc Ores
Over a limit 10×: Zinc, total recoverable (2×), Cadmium, total recoverable (2×), Lead, total recoverable (2×)Permit past the expiry date EPA's file holds
Caldera Holding LLC
MO0000574 · major · Iron Ores
Over a limit 8×: Lead, total recoverable (3×), Copper, total recoverable (3×), Iron, total recoverable (1×)Renewal application due Jan 1, 2027
Doe Run Company
MO0001121 · major · Lead And Zinc Ores
Over a limit 3×: Cadmium, total recoverable (1×), Lead, total recoverable (1×), Copper, total recoverable (1×)Permit past the expiry date EPA's file holds
The Doe Run Resources Corp
MO0001881 · major · Lead And Zinc Ores
Over a limit 2×: Zinc, total recoverable (2×)Expires Oct 31, 2030
TECK AMERICAN INCORPORATED
MO0001872 · major · Lead And Zinc Ores
No value over a limitExpires Nov 30, 2030
THE DOE RUN RESOURCES CORPORATION
MO0100226 · major · Lead And Zinc Ores
No value over a limitExpires Oct 31, 2030
THE DOE RUN RESOURCES CORPORATION
MO0133221 · Lead And Zinc Ores
No value over a limitExpires Dec 31, 2030
The Doe Run Company
MO0001848 · major · Lead And Zinc Ores
No value over a limitPermit past the expiry date EPA's file holds
The Doe Run Company
MO0100218 · major · Lead And Zinc Ores
No value over a limitPermit past the expiry date EPA's file holds
The Doe Run Resources Corp
MO0002003 · major · Lead And Zinc Ores
No value over a limitPermit past the expiry date EPA's file holds

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=MO&sic=10, 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