Clean Water Act discharge permit · NPDES IL0031429
TILTON STP, VILLAGE OF, Tilton, IL: NPDES IL0031429 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
TILTON STP, VILLAGE OF, held by TILTON, VILLAGE OF, holds NPDES permit IL0031429, which discharges to Vermilion River. EPA’s file records it issued May 27, 2021 and expiring May 31, 2026. 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 | TILTON STP, VILLAGE OF |
|---|---|
| Permittee as filed | TILTON, VILLAGE OF |
| NPDES ID | IL0031429 |
| 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 | May 27, 2021 |
| Expiration date | May 31, 2026 |
| Address | Tilton, IL 61833 |
| Receiving water | VERMILION RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Butter Branch-Vermilion River (HUC 051201090901) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 11Pollutants on file
- 10Under a numeric limit
- 11With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 9 | 32 | 21 | May 31, 2001 | 433% over the limit |
| Oxygen, dissolved [DO] | 11 | 25 | 18 | December 31, 2023 | 27% over the limit |
| Nitrogen, ammonia total [as N] | 32 | 14 | 2 | May 31, 2024 | 42% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 16 | 9 | 1 | April 30, 2024 | 13% over the limit |
| Coliform, fecal general | 2 | 2 | 1 | July 31, 1998 | 17% over the limit |
| Flow, in conduit or thru treatment plant | 6 | 46 | 0 | ||
| Solids, total suspended | 19 | 29 | 0 | ||
| BOD, 5-day, 20 deg. C | 3 | 20 | 0 | ||
| Flow | 0 | 14 | 0 | ||
| pH | 6 | 8 | 0 | ||
| Flow, total | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 6, 2026 | Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment | ST6 |
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 IL0031429 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.