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Of the 11 permits in EPA's SIC 28 in OK, 5 went over a limit between 2025-10-01 and 2026-09-30 (pH: 3; Solids, total suspended: 3; Oil & Grease: 1). 2 are past the expiry date EPA's file holds; 2 have a renewal application overdue or due within 18 months. EPA's file of 2026-10-15.
All Oklahoma permitsAll states
| Facility | Last 12 months | Permit |
|---|---|---|
| 3M Technical Ceramics OK0040142 · Industrial Inorganic Chemicals | Over a limit 9×: Oxidants, total residual (7×), pH (1×), Solids, total suspended (1×) | Expires Jan 31, 2030 |
| Nucera Solutions LLC OK0000841 · Industrial Organic Chemicals | Over a limit 5×: Toluene (2×), Oil & Grease (2×), Solids, total suspended (1×) | Expires Sep 30, 2030 |
| Chemtrade Refinery Services Inc. OK0036439 · Industrial Inorganic Chemicals | Over a limit 2×: pH (1×), Sulfate, total [as SO4] (1×) | Expires Mar 31, 2031 |
| Sterling Specialty Chemicals, LLC OK0000388 · Chemical Preparations | Over a limit 2×: pH (1×), Solids, total suspended (1×) | Renewal application overdue |
| Interplastic Corporation OK0044466 · Plastics Materials And Resins | Over a limit 1×: Oxygen demand, chem. [high level] [COD] (1×) | Expires Mar 31, 2031 |
| Air Products & Chemicals Inc OK0045934 · Nitrogenous Fertilizers | No value over a limit | Renewal application due Sep 2, 2027 |
| Cargill Inc.-Salt Division OK0040240 · Chemical Preparations | No value over a limit | Expires May 31, 2029 |
| Koch Fertilizer Enid, LLC OK0021024 · major · Nitrogenous Fertilizers | No value over a limit | Expires Apr 30, 2030 |
| Sequoyah Fuels Corporation OK0000191 · Industrial Inorganic Chemicals | No value over a limit | Permit past the expiry date EPA's file holds |
| Terra International (Oklahoma) -Woodward OK0036161 · major · Nitrogenous Fertilizers | No value over a limit | Permit past the expiry date EPA's file holds |
| Terra Nitrogen, L.P.- Verdigris OK0029149 · major · Nitrogenous Fertilizers | No value over a limit | Expires Nov 30, 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=OK&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