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Of the 4 permits in EPA's SIC 4939 in IL, 3 went over a limit between 2025-10-01 and 2026-09-30 (Nitrogen, ammonia total [as N]: 2; Solids, total suspended: 2; BOD, carbonaceous [5 day, 20 C]: 1). 0 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 Illinois permitsAll states
| Facility | Last 12 months | Permit |
|---|---|---|
| OTTER CREEK LAKE UTILITY DISTRICT IL0048593 · Combination Utilities | Over a limit 14×: Nitrogen, ammonia total [as N] (9×), Solids, total suspended (3×), Oxygen, dissolved [DO] (2×) | Renewal application due Feb 2, 2028 |
| STRATFORD WEST ASSOCIATION, INC. IL0071030 · Combination Utilities | Over a limit 6×: BOD, carbonaceous [5 day, 20 C] (4×), Nitrogen, ammonia total [as N] (2×) | Expires Jan 31, 2030 |
| AQUA ILLINOIS INC IL0045527 · Combination Utilities | Over a limit 1×: Solids, total suspended (1×) | Renewal application due Feb 1, 2027 |
| STONEWALL UTILITY COMPANY IL0052817 · Combination Utilities | No value over a limit; 49 required values not reported | Expires Aug 31, 2029 |
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=IL&sic=4939, 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