Clean Water Act discharge permit · NPDES IL0028231
COWDEN STP, Cowden, IL: NPDES IL0028231 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
COWDEN STP, held by COWDEN, VILLAGE OF, holds NPDES permit IL0028231, which discharges to Unnamed Trib Of Kaskaskia River. EPA’s file records it issued April 11, 2018 and expiring April 30, 2023. 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 | COWDEN STP |
|---|---|
| Permittee as filed | COWDEN, VILLAGE OF |
| NPDES ID | IL0028231 |
| 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 | April 11, 2018 |
| Expiration date | April 30, 2023 |
| Address | Cowden, IL 62422 |
| Receiving water | UNNAMED TRIB OF KASKASKIA RIVER |
| Subwatershed | Hog Creek-Kaskaskia River (HUC 071402011103) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 15Pollutants on file
- 10Under a numeric limit
- 15With a violation of any kind
- 7With 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 |
|---|---|---|---|---|---|
| Oxygen, dissolved [DO] | 5 | 114 | 58 | August 31, 2025 | 85% over the limit |
| Coliform, fecal general | 2 | 144 | 54 | August 31, 2025 | 99,999% over the limit |
| Solids, total suspended | 8 | 437 | 50 | August 31, 2025 | 281% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 272 | 16 | June 30, 2025 | 212% over the limit |
| pH | 4 | 265 | 5 | July 31, 2014 | |
| BOD, 5-day, 20 deg. C | 4 | 143 | 4 | June 30, 2025 | 57% over the limit |
| Chlorine, total residual | 3 | 163 | 1 | March 31, 2021 | 60% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 280 | 0 | ||
| Flow, total | 2 | 49 | 0 | ||
| Rainfall | 0 | 44 | 0 | ||
| Rainfall duration | 0 | 22 | 0 | ||
| Duration | 0 | 22 | 0 | ||
| Overflows | 0 | 22 | 0 | ||
| Nitrogen, ammonia total [as N] | 3 | 21 | 0 | ||
| Flow | 0 | 21 | 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 IL0028231.
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, IL0028231.
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 IL0028231 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.