Clean Water Act discharge permit · NPDES IL0031275
STILLMAN VALLEY STP, VILLAGE OF, Stillman Valley, IL: NPDES IL0031275 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
STILLMAN VALLEY STP, VILLAGE OF, held by STILLMAN VALLEY STP, holds NPDES permit IL0031275, which discharges to Stillman Ck-Rock R-Mississippi R. EPA’s file records it issued June 28, 2006 and expiring July 31, 2011. 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 | STILLMAN VALLEY STP, VILLAGE OF |
|---|---|
| Permittee as filed | STILLMAN VALLEY STP |
| NPDES ID | IL0031275 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | June 28, 2006 |
| Expiration date | July 31, 2011 |
| Address | Stillman Valley, IL 61084 |
| Receiving water | STILLMAN CK-ROCK R-MISSISSIPPI R |
| Subwatershed | Town of Stillman Valley-Stillman Creek (HUC 070900050404) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 8Under a numeric limit
- 8With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 50 | 65 | 49 | February 28, 2014 | 880% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 37 | 9 | February 29, 2004 | 110% over the limit |
| Solids, total suspended | 5 | 59 | 8 | June 30, 2005 | 183% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 64 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 23 | 0 | ||
| pH | 2 | 16 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 3 | 0 | ||
| Chlorine, total residual | 1 | 2 | 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 IL0031275.
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, IL0031275.
Start the watch
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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 IL0031275 there.
Nearby on the register
- Discharge permits in Stillman Valley
- Every permit record in Stillman Valley, A to Z
- Discharge permits in Illinois
- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.