Clean Water Act discharge permit · NPDES IL0076589
NEPONSET STP, VILLAGE OF, Neponset, IL: NPDES IL0076589 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
NEPONSET STP, VILLAGE OF, held by NEPONSET, VILLAGE OF, holds NPDES permit IL0076589, which discharges to Unnamed Trib Of West Fork Spoon Rvr. EPA’s file records it issued July 19, 2017 and expiring July 31, 2022. 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 | NEPONSET STP, VILLAGE OF |
|---|---|
| Permittee as filed | NEPONSET, VILLAGE OF |
| NPDES ID | IL0076589 |
| 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 | July 19, 2017 |
| Expiration date | July 31, 2022 |
| Address | Neponset, IL 61345 |
| Receiving water | UNNAMED TRIB OF WEST FORK SPOON RVR |
| Subwatershed | Headwaters East Fork Spoon River (HUC 071300050102) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 9Pollutants on file
- 9Under a numeric limit
- 9With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 16 | 117 | 87 | January 31, 2026 | 2,161% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 62 | 38 | July 31, 2013 | 2,460% over the limit |
| Oxygen, dissolved [DO] | 5 | 33 | 24 | May 31, 2024 | 57% over the limit |
| Solids, total suspended | 5 | 35 | 9 | August 31, 2024 | 337% over the limit |
| pH | 2 | 15 | 3 | July 31, 2024 | |
| Flow, in conduit or thru treatment plant | 4 | 12 | 0 | ||
| Chlorine, total residual | 1 | 7 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 1 | 0 | ||
| Coliform, fecal general | 1 | 1 | 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 IL0076589.
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, IL0076589.
Start the watch
- One permit holder — $99/month
- 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 IL0076589 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.