Clean Water Act discharge permit · NPDES IL0026701
TRENTON STP, Trenton, IL: NPDES IL0026701 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
TRENTON STP, held by TRENTON, CITY OF, holds NPDES permit IL0026701, which discharges to Trenton Creek. EPA’s file records it issued September 22, 2017 and expiring September 30, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | TRENTON STP |
|---|---|
| Permittee as filed | TRENTON, CITY OF |
| NPDES ID | IL0026701 |
| 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 | September 22, 2017 |
| Expiration date | September 30, 2022 |
| Address | Trenton, IL 62293 |
| Receiving water | TRENTON CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Sportsman Lake-Sugar Creek (HUC 071402040104) |
| Program components on file | Biosolids, POTW |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler ILD984891515 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 10Pollutants on file
- 10Under a numeric limit
- 8With a violation of any kind
- 6With 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] | 14 | 72 | 47 | February 28, 2026 | 1,598% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 60 | 36 | February 28, 2026 | 750% over the limit |
| Solids, total suspended | 5 | 37 | 8 | February 28, 2026 | 125% over the limit |
| Oxygen, dissolved [DO] | 5 | 9 | 5 | July 31, 2011 | 26% over the limit |
| pH | 2 | 13 | 1 | December 31, 2003 | |
| Chlorine, total residual | 1 | 8 | 1 | July 31, 2023 | 80% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 16 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 1 | 0 | ||
| Phosphorus, total [as P] | 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
- 5Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 14, 2026 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | ST6 |
| July 19, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | ST6 |
| July 17, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | ST6 |
| April 19, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | ST6 |
| April 4, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | 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 IL0026701 there.
Nearby on the register
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- Every permit record in Trenton, A to Z
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- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.