Clean Water Act discharge permit · NPDES IL0050717
AQUA ILLINOIS - GRANT PARK STP, Grant Park, IL: NPDES IL0050717 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
AQUA ILLINOIS - GRANT PARK STP, held by GRANT PARK, VILLAGE OF, holds NPDES permit IL0050717, which discharges to Unnamed Trib To Trim Creek. EPA’s file records it issued February 25, 2016 and expiring February 28, 2021. 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 | AQUA ILLINOIS - GRANT PARK STP |
|---|---|
| Permittee as filed | GRANT PARK, VILLAGE OF |
| NPDES ID | IL0050717 |
| 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 | February 25, 2016 |
| Expiration date | February 28, 2021 |
| Address | Grant Park, IL 60940 |
| Receiving water | UNNAMED TRIB TO TRIM CREEK |
| Subwatershed | Trim Creek (HUC 071200011402) |
| Program components on file | Biosolids, CSO, POTW |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 10Pollutants on file
- 10Under 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 3 | 25 | 23 | June 30, 2026 | 19,900% over the limit |
| Oxygen, dissolved [DO] | 10 | 6 | 2 | October 31, 2024 | 5% over the limit |
| Solids, total suspended | 11 | 20 | 1 | March 31, 2024 | 28% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 8 | 17 | 1 | October 31, 2001 | 26% over the limit |
| Chlorine, total residual | 3 | 8 | 1 | November 30, 2024 | 5% over the limit |
| Flow, in conduit or thru treatment plant | 6 | 16 | 0 | ||
| pH | 6 | 10 | 0 | ||
| BOD, 5-day, 20 deg. C | 3 | 3 | 0 | ||
| Flow, total | 1 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 30, 2025 | Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment | ST6 |
| March 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 IL0050717 there.
Nearby on the register
- Discharge permits in Grant Park
- Every permit record in Grant Park, A to Z
- Discharge permits in Illinois
- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.