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Of the 45 permits in EPA's SIC 4911 in IL, 8 went over a limit between 2025-10-01 and 2026-09-30 (Solids, total suspended: 6; Chlorine, total residual: 2; pH: 2). 18 are past the expiry date EPA's file holds; 11 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 |
|---|---|---|
| SPRINGFIELD, CITY OF IL0024767 · major · Electric Services | Over a limit 7×: Solids, total suspended (5×), pH (1×), Boron, total [as B] (1×) | Renewal application due Apr 3, 2027 |
| PRAIRIE STATE GENERATING COMPANY LLC IL0076996 · major · Electric Services | Over a limit 6×: Solids, total suspended (5×), pH (1×) | Permit past the expiry date EPA's file holds |
| PERU STARVED ROCK HYDROELECTRIC PLANT, CITY OF IL0078051 · Electric Services | Over a limit 5×: Solids, total suspended (5×) | Expires Jul 31, 2030 |
| DYNEGY MIDWEST GENERATION, LLC IL0000043 · major · Electric Services | Over a limit 2×: Coliform, fecal general (1×), Solids, total suspended (1×) | Renewal application due May 4, 2027 |
| CALUMET ENERGY FACILITY IL0075108 · Electric Services | Over a limit 1×: Chlorine, total residual (1×) | Expires Jul 31, 2030 |
| DYNEGY MIDWEST GENERATION LLC IL0004057 · Electric Services | Over a limit 1×: Solids, total suspended (1×) | Expires Nov 30, 2028 |
| KINCAID GENERATION LLC IL0002241 · major · Electric Services | Over a limit 1×: Solids, total suspended (1×) | Permit past the expiry date EPA's file holds |
| UNION ELECTRIC d/b/a AMEREN MISSOURI IL0000175 · Electric Services | Over a limit 1×: Chlorine, total residual (1×) | Permit past the expiry date EPA's file holds |
| AMEREN MISSOURI IL0075001 · Electric Services | No value over a limit | Renewal application due Jan 2, 2028 |
| AMEREN UE IL0075906 · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| AMERENENERGY MEDINA COGEN LLC IL0004120 · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| AMERENENERGY MEDINA VALLEY COGEN LLC IL0000116 · major · Electric Services | No value over a limit | Expires Nov 30, 2028 |
| COMMONWEALTH EDISON COMPANY IL0059064 · Electric Services | No value over a limit | Renewal application due Nov 1, 2026 |
| CONSTELLATION ENERGY GENERATION LLC IL0005037 · major · Electric Services | No value over a limit | Expires Mar 31, 2031 |
| CONSTELLATION GENERATION CO LLC IL0048151 · major · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| CORDOVA ENERGY COMPANY, LLC IL0074438 · Electric Services | No value over a limit | Expires Dec 31, 2030 |
| CTI DEVELOPMENT LLC IL0000701 · Electric Services | No value over a limit; 162 required values not reported | Permit past the expiry date EPA's file holds |
| DAIRYLAND POWER COOPERATIVE IL0046779 · Electric Services | No value over a limit | Expires May 31, 2030 |
| DYNEGY MIDWEST GENERATION LLC IL0001554 · major · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| DYNEGY MIDWEST GENERATION LLC IL0001571 · major · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| ELECTRIC ENERGY INC IL0004171 · major · Electric Services | No value over a limit | Renewal application due Apr 3, 2027 |
| EXELON GENERATION COMPANY LLC IL0036919 · major · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| EXELON GENERATION COMPANY LLC IL0048313 · major · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| EXELON GENERATION COMPANY LLC IL0048321 · major · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| EXELON GENERATION COMPANY, LLC IL0002224 · major · Electric Services | No value over a limit; 6 required values not reported | Permit past the expiry date EPA's file holds |
| GRAND TOWER ENERGY CENTER LLC IL0000124 · major · Electric Services | No value over a limit | Expires Dec 31, 2030 |
| HOLLAND ENERGY LLC IL0074268 · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| ILLINOIS POWER GENERATING COMPANY IL0000108 · major · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| ILLINOIS POWER GENERATING COMPANY IL0049191 · major · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| ILLINOIS POWER RESOURCES GENERATING LLC IL0001970 · major · Electric Services | No value over a limit | Renewal application due Nov 1, 2026 |
| INVENERGY NELSON LLC IL0074209 · Electric Services | No value over a limit | Renewal application due May 4, 2027 |
| JACKSON GENERATION LLC IL0080134 · Electric Services | No value over a limit | Expires Dec 31, 2029 |
| KENDALL POWER COMPANY LLC IL0073806 · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| METROPOLITAN WRD OF GREATER CHICAGO IL0077305 · Electric Services | No value over a limit | Expires Apr 30, 2029 |
| MIDWEST GENERATION LLC IL0002178 · Electric Services | No value over a limit | Expires Mar 31, 2029 |
| MIDWEST GENERATION LLC IL0002208 · major · Electric Services | No value over a limit | Renewal application overdue |
| MIDWEST GENERATION LLC IL0002232 · major · Electric Services | No value over a limit | Permit past the expiry date EPA's file holds |
| MIDWEST GENERATION, LLC IL0002216 · major · Electric Services | No value over a limit | Renewal application due Apr 3, 2028 |
| MIDWEST GENERATION, LLC IL0002259 · major · Electric Services | No value over a limit | Expires Oct 31, 2030 |
| MIDWEST GENERATION, LLC IL0048143 · Electric Services | No value over a limit | Expires Apr 30, 2031 |
| MIDWEST GENERATION, LLC IL0064254 · major · Electric Services | No value over a limit | Expires Mar 31, 2031 |
| PRAIRIE POWER INC IL0036765 · Electric Services | No value over a limit; 8 required values not reported | Expires Apr 30, 2030 |
| SOUTHERN ILLINOIS POWER COOPERATIVE IL0004316 · major · Electric Services | No value over a limit | Renewal application due Jan 1, 2027 |
| UNION ELECTRIC COMPANY d/b/a AMEREN MISSOURI IL0076490 · Electric Services | No value over a limit | Expires Oct 31, 2030 |
| WINNETKA , VILLAGE OF IL0002364 · Electric Services | No value over a limit | Renewal application due Jul 4, 2027 |
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=4911, 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