Clean Water Act discharge permit · NPDES IL0077526
PRAIRIE STATE GENERATING COMPANY LLC, Marissa, IL: NPDES IL0077526 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 12Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
PRAIRIE STATE GENERATING COMPANY LLC holds NPDES permit IL0077526, which discharges to Unnamed Tributary To Mud Creek. EPA’s file records it issued December 16, 2011 and expiring November 30, 2016. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | PRAIRIE STATE GENERATING COMPANY LLC |
|---|---|
| Permittee as filed | PRAIRIE STATE GENERATING COMPANY LLC |
| NPDES ID | IL0077526 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 16, 2011 |
| Expiration date | November 30, 2016 |
| Address | Marissa, IL 62257 |
| Receiving water | UNNAMED TRIBUTARY TO MUD CREEK |
| Subwatershed | South Fork Mud Creek (HUC 071402040302) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 12Pollutants on file
- 12Under a numeric limit
- 11With a violation of any kind
- 1With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 4 | 5 | 1 | May 31, 2025 | 77% over the limit |
| pH | 8 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 8 | 4 | 0 | ||
| Iron, total [as Fe] | 4 | 4 | 0 | ||
| Hardness, total [as CaCO3] | 4 | 2 | 0 | ||
| Chloride [as Cl] | 4 | 2 | 0 | ||
| Sulfate, total [as SO4] | 4 | 2 | 0 | ||
| Alkalinity, total [as CaCO3] | 2 | 2 | 0 | ||
| Acidity, total [as CaCO3] | 2 | 2 | 0 | ||
| Manganese, total [as Mn] | 2 | 2 | 0 | ||
| Mercury, total [as Hg] | 2 | 2 | 0 | ||
| Solids, settleable | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IL0077526.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID IL0077526 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.