Clean Water Act discharge permit · NPDES IL0059374
THAYER STP, VILLAGE, Thayer, IL: NPDES IL0059374 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
THAYER STP, VILLAGE, held by THAYER, VILLAGE OF, holds NPDES permit IL0059374, which discharges to Unnamed Tributary Of Salt Creek. EPA’s file records it issued November 22, 2024 and expiring November 30, 2029. 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 | THAYER STP, VILLAGE |
|---|---|
| Permittee as filed | THAYER, VILLAGE OF |
| NPDES ID | IL0059374 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | November 22, 2024 |
| Expiration date | November 30, 2029 |
| Address | Thayer, IL 62689 |
| Receiving water | UNNAMED TRIBUTARY OF SALT CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Sugar Creek Channel (HUC 071300070703) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 10Pollutants on file
- 10Under a numeric limit
- 1With 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 | 5 | 4 | 4 | June 30, 2026 | 35% over the limit |
| Oxygen, dissolved [DO] | 5 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 4 | 0 | 0 | ||
| Phosphorus, total [as P] | 3 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 0 | 0 | ||
| Chlorine, total residual | 1 | 0 | 0 | ||
| Coliform, fecal general | 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 IL0059374.
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, IL0059374.
Start the watch
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- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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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 IL0059374 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.