NPDES IN0023353 · Clean Water Act
FOUR MILE HILL STP, Kokomo, IN: NPDES IN0023353 discharge permit, effluent exceedances, inspections, penalties
FOUR MILE HILL STP, Kokomo, Indiana: Individual permit IN0023353, held by FOUR MILE HILL WWTP; Effective; issued July 29, 2020, term to September 30, 2025, by IDEM; discharges to WILDCAT CR TO WABASH RIVER; Sewage Treatment Facilities.
1 of the 11 pollutants listed for NPDES IN0023353 have no violation or effluent exceedance.
- E. coli, colony forming units [CFU]: 3 limits, 61 violations of any kind, 29 effluent exceedances, latest May 31, 2024, largest 2,296% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 4 limits, 132 violations of any kind, 26 effluent exceedances, latest April 30, 2016, largest 1,766% over the limit.
- Nitrogen, ammonia total [as N]: 4 limits, 123 violations of any kind, 17 effluent exceedances, latest February 28, 2026, largest 189% over the limit.
- Chlorine, total residual: 4 limits, 69 violations of any kind, 5 effluent exceedances, latest May 31, 2013, largest 100% over the limit.
- Solids, total suspended: 4 limits, 109 violations of any kind, 3 effluent exceedances, latest May 31, 2012, largest 566% over the limit.
- pH: 2 limits, 50 violations of any kind.
- Flow, in conduit or thru treatment plant: 1 limit, 35 violations of any kind.
- Flow, total: 1 limit, 27 violations of any kind.
- BOD, carb-5 day, 20 deg C, percent removal: 0 limits, 2 violations of any kind.
- Solids, suspended percent removal: 0 limits, 2 violations of any kind.
- Number of Events: 2 limits.
- August 19, 2026: Management Practice Violations - Improper Operation and Maintenance (ST6).
- August 19, 2026: Evaluation (S).
- August 19, 2026: Notice of Noncompliance Issued (State).
FOUR MILE HILL STP among its neighbors
17 discharge permits are in the Kitty Run-Wildcat Creek subwatershed (HUC 051201070403); IN0023353 is one. Its county: 48, 1 major; IN0023353 is minor permit.
Other permits in the Kitty Run-Wildcat Creek subwatershed (HUC 051201070403)
- 353-688-HAYNES-INTERNATIONAL-FORGE, Kokomo: INRA17587, minor, term to 2031-02-17
- CLOVERLEAF TRAIL, Kokomo: INRA07845, minor, term to 2026-06-22
- DAVENTRY, Kokomo: INRA18509, minor, term to 2031-07-12
- DEVON WOODS SEWER UTILITY, INC., Kokomo: IN0044652, minor, term to 2025-05-31
- DIXON ROAD MATERIAL HANDLING SITE, Kokomo: INRA13810, minor, term to 2029-05-05
- HAYNES INTERNATIONAL INC DEFENBAUGH ST OPERATIONS, Kokomo: INRM00265, minor, term to 2026-03-06
- HYNES INDUSTRIES, Kokomo: INRM02908, minor, term to 2027-11-06
- IRVING MATERIALS INC KOKOMO, Kokomo: INRM00347, minor, term to 2026-03-14
- KOKOMO BUS STORAGE FACILITY, Kokomo: INRA08134, minor, term to 2026-07-12
- KOKOMO VILLAS, Kokomo: INRA11060, minor, term to 2027-12-21
Identity
| Facility | FOUR MILE HILL STP |
|---|---|
| Permittee | FOUR MILE HILL WWTP |
| NPDES ID | IN0023353 |
| Status | Effective |
| Type | Individual permit |
| Class | Minor |
| Facility type | Non-POTW |
| Issued | July 29, 2020 |
| Expires | September 30, 2025 |
| Agency | IDEM |
| Address | Kokomo, IN 46901 |
| Receiving water | WILDCAT CR TO WABASH RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Kitty Run-Wildcat Creek (HUC 051201070403) |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
NPDES IN0023353: effluent limits and exceedances
FOUR MILE HILL STP (NPDES IN0023353): 11 pollutants on file, 9 limited; 10 with a violation of any kind, 5 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| E. coli, colony forming units [CFU] | 3 | 61 | 29 | May 31, 2024 | 2,296% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 132 | 26 | April 30, 2016 | 1,766% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 123 | 17 | February 28, 2026 | 189% over the limit |
| Chlorine, total residual | 4 | 69 | 5 | May 31, 2013 | 100% over the limit |
| Solids, total suspended | 4 | 109 | 3 | May 31, 2012 | 566% over the limit |
| pH | 2 | 50 | 0 | ||
| Flow, in conduit or thru treatment plant | 1 | 35 | 0 | ||
| Flow, total | 1 | 27 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 0 | 2 | 0 | ||
| Solids, suspended percent removal | 0 | 2 | 0 | ||
| Number of Events | 2 | 0 | 0 |
NPDES IN0023353: inspections, violations and enforcement
NPDES IN0023353: 1 single-event violation
| Date | What EPA recorded | Agency |
|---|---|---|
| August 19, 2026 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
NPDES IN0023353: 1 inspection
| Date | What EPA recorded | Agency |
|---|---|---|
| August 19, 2026 | Evaluation | S |
NPDES IN0023353: 1 informal enforcement action
| Date | What EPA recorded | Agency |
|---|---|---|
| August 19, 2026 | Notice of Noncompliance Issued | State |
NPDES IN0023353 (FOUR MILE HILL STP): no formal enforcement action on file.
Watch NPDES IN0023353
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Permits near NPDES IN0023353
NPDES IN0023353: 11 pollutant rows, 3 dated events; ICIS-NPDES download, loaded October 14, 2026.