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Of the 15 permits in EPA's SIC 28 in MN, 7 went over a limit between 2025-10-01 and 2026-09-30 (Solids, total suspended: 5; BOD, carbonaceous [5 day, 20 C]: 2; Chlorine, total residual: 1). 2 are past the expiry date EPA's file holds; 7 have a renewal application overdue or due within 18 months. EPA's file of 2026-10-15.
All Minnesota permitsAll states
| Facility | Last 12 months | Permit |
|---|---|---|
| DENCO II LLC MN0060232 · Industrial Organic Chemicals | Over a limit 7×: BOD, carbonaceous [5 day, 20 C] (4×), Solids, total suspended (3×) | Expires May 31, 2030 |
| Poet Biorefining MN0065692 · Industrial Organic Chemicals | Over a limit 7×: Solids, total suspended (6×), BOD, carbonaceous [5 day, 20 C] (1×) | Renewal application due Jun 3, 2027 |
| POET Biorefining - Lake Crystal LLC MN0067172 · Industrial Organic Chemicals | Over a limit 6×: Solids, total suspended (6×) | Expires Nov 30, 2028 |
| 3M Chemical Operations LLC MN0001449 · major · Chemical Preparations | Over a limit 4×: Mercury, total [as Hg] (3×), Chlorine, total residual (1×) | Expires May 31, 2030 |
| Heron Lake BioEnergy MN0067385 · Industrial Organic Chemicals | Over a limit 4×: Solids, total suspended (4×) | Renewal application due Apr 3, 2027 |
| Dyno Nobel Inc MN0060704 · Explosives | Over a limit 2×: pH (2×) | Expires Oct 31, 2030 |
| POET Biorefining - Preston, LLC MN0064017 · Industrial Organic Chemicals | Over a limit 2×: Solids, total suspended (2×) | Renewal application due Feb 1, 2027 |
| Cargill Inc MN0041521 · Industrial Organic Chemicals | No value over a limit | Expires May 31, 2031 |
| Gevo MN0064033 · Industrial Organic Chemicals | No value over a limit | Renewal application due Nov 2, 2027 |
| Granite Falls Energy LLC MN0066800 · Industrial Organic Chemicals | No value over a limit | Permit past the expiry date EPA's file holds |
| Green Plains LLC MN0068063 · Industrial Organic Chemicals | No value over a limit | Permit past the expiry date EPA's file holds |
| Heartland Corn Products MN0062561 · Industrial Organic Chemicals | No value over a limit | Renewal application due Dec 3, 2027 |
| NCL Acquisition Corporation MN0066508 · Toilet Preparations | No value over a limit | Expires Jul 31, 2030 |
| POET Biorefining - Bingham Lake LLC MN0063118 · Industrial Organic Chemicals | No value over a limit | Renewal application overdue |
| Valero Renewable Fuels Co. LLC-Welcome Plant MN0068161 · Industrial Organic Chemicals | No value over a limit | Renewal application due Jan 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=MN&sic=28, narrowed with &over_limit=true, ¶meter=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