NPDES IN0020893 · Clean Water Act
CORYDON WWTP, Corydon, IN: NPDES IN0020893 discharge permit, effluent exceedances, inspections, penalties
CORYDON WWTP, Corydon, Indiana: Individual permit IN0020893; Publicly owned treatment works; Administratively continued; issued April 30, 2018, term to June 30, 2023, by IDEM; discharges to OHIO RIVER FROM INDIAN CREEK.
12 of the 29 pollutants listed for NPDES IN0020893 have no violation or effluent exceedance.
- Nitrogen, ammonia total [as N]: 8 limits, 17 violations of any kind, 9 effluent exceedances, latest February 28, 2026, largest 894% over the limit.
- NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia: 0 limits, 5 violations of any kind, 2 effluent exceedances, latest December 31, 2003, largest 74% over the limit.
- Phosphorus, total [as P]: 2 limits, 1 violation of any kind, 1 effluent exceedance, latest September 30, 2025, largest 7% over the limit.
- Nitrogen, total [as N]: 0 limits, 14 violations of any kind.
- Number of Events: 2 limits, 7 violations of any kind.
- Oxygen, dissolved [DO]: 2 limits, 5 violations of any kind.
- Solids, total suspended: 8 limits, 4 violations of any kind.
- BOD, carbonaceous [5 day, 20 C]: 8 limits, 4 violations of any kind.
- E. coli, colony forming units [CFU]: 3 limits, 4 violations of any kind.
- LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia: 0 limits, 3 violations of any kind.
- LC50 Static Renewal 96Hr Acute Pimephales promelas: 0 limits, 3 violations of any kind.
- Noel Statre 7Day Chronic Pimephales: 0 limits, 3 violations of any kind.
- pH: 2 limits, 2 violations of any kind.
- Flow, in conduit or thru treatment plant: 1 limit, 2 violations of any kind.
- Flow, wastewater by-passing trtmnt plant: 0 limits, 1 violation of any kind.
- BOD, carb-5 day, 20 deg C, percent removal: 0 limits, 1 violation of any kind.
- Solids, suspended percent removal: 0 limits, 1 violation of any kind.
- Toxicity [acute], Ceriodaphnia dubia: 3 limits.
- Toxicity [chronic], Ceriodaphnia dubia: 3 limits.
- Toxicity [acute], Pimephales promelas [Fathead Minnow]: 3 limits.
- Toxicity [chronic], Pimephales promelas [Fathead Minnow]: 3 limits.
- Copper, dry weight: 1 limit.
- Cadmium, dry weight: 1 limit.
- Molybdenum, sludge, total, dry weight [as Mo]: 1 limit.
- Zinc, sludge, total, dry weight [as Zn]: 1 limit.
- Lead, sludge, total, dry weight [as Pb]: 1 limit.
- Nickel, sludge, total, dry weight [as Ni]: 1 limit.
- Mercury, sludge, total, dry weight [as Hg]: 1 limit.
- Flow, total: 1 limit.
- June 25, 2026: Effluent Violations - Numeric effluent violation (ST6).
- June 25, 2026: Evaluation (S).
- June 25, 2026: Notice of Noncompliance Issued (State).
Indiana holds 541 Publicly owned treatment works coverages of this permit type in EPA’s file; 171 were issued before IN0020893. CORYDON WWTP holds 2 permits in Indiana.
Other permits held by CORYDON WWTP
- CORYDON WWTP, Corydon: INL020893, issued 2021-01-01
Coverages issued nearest IN0020893
- 2018-04-02: KNIGHTSTOWN WWTP, Knightstown: IN0040177
- 2018-04-02: LYNNVILLE WWTP, Lynnville: IN0040282, held by LYNNVILLE WWTP
- 2018-04-10: MULBERRY WWTP, Mulberry: IN0031976
- 2018-04-30: PORTLAND WWTP, Portland: IN0020095
- 2018-04-30: MIDDLETOWN WWTP, Middletown: IN0020770
- 2018-04-30: HARTSVILLE WWTP, Hartsville: IN0021075
- 2018-04-30: DALE MUNICIPAL WWTP, Dale: IN0021598, held by DALE WASTEWATER TREATMENT PLANT
- 2018-04-30: GAS CITY WWTP, Gas City: IN0022985
- 2018-04-30: PRINCETON WWTP, Princeton: IN0024392, held by PRINCETON WASTEWATER TREATMENT PLANT
- 2018-04-30: GREENS FORK WWTP, Greens Fork: IN0061841
CORYDON WWTP among its neighbors
15 discharge permits are in the Town of Lanesville-Little Indian Creek subwatershed (HUC 051401040402); IN0020893 is one. Its county: 43, 2 major; IN0020893 is major permit.
Other permits in the Town of Lanesville-Little Indian Creek subwatershed (HUC 051401040402)
- 471 CORYDON DOLLAR GENERAL, Corydon: INRA15582, minor, term to 2030-03-17
- CORYDON MUNICIPAL SATELLITE #2 WWTP, Corydon: INL062863, minor, term to 2025-12-31
- CORYDON TRAIL, Corydon: INRA17310, minor, term to 2030-12-11
- CORYDON WWTP, Corydon: INL020893, minor, term to 2025-12-31
- LANESVILLE WELCOME CENTER, Georgetown: IN0045942, minor, term to 2016-03-31
- LANESVILLE WWTP, Lanesville: IN0040215, minor, term to 2025-02-28
- POPLAR WOODS SUBDIVISION, Lanesville: INRA07404, minor, term to 2026-03-24
- ROBERTSON READY MIX, Georgetown: INRM03275, minor, term to 2031-06-21
- SHCSC CORYDON CENTRAL CAMPUS ATHLETICS IMPROVEMENTS, Corydon: INRA13783, minor, term to 2029-04-30
- SHCSC NEW BUS MAINTENANCE FACILITY, Corydon: INRA13821, minor, term to 2029-05-05
Identity
| Facility | CORYDON WWTP |
|---|---|
| Permittee | CORYDON WWTP |
| NPDES ID | IN0020893 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Major |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | April 30, 2018 |
| Expires | June 30, 2023 |
| Agency | IDEM |
| Address | Corydon, IN 47112 |
| Receiving water | OHIO RIVER FROM INDIAN CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Town of Lanesville-Little Indian Creek (HUC 051401040402) |
| Program components on file | Biosolids, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
NPDES IN0020893: effluent limits and exceedances
CORYDON WWTP (NPDES IN0020893): 29 pollutants on file, 21 limited; 17 with a violation of any kind, 3 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 8 | 17 | 9 | February 28, 2026 | 894% over the limit |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | 0 | 5 | 2 | December 31, 2003 | 74% over the limit |
| Phosphorus, total [as P] | 2 | 1 | 1 | September 30, 2025 | 7% over the limit |
| Nitrogen, total [as N] | 0 | 14 | 0 | ||
| Number of Events | 2 | 7 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 5 | 0 | ||
| Solids, total suspended | 8 | 4 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 8 | 4 | 0 | ||
| E. coli, colony forming units [CFU] | 3 | 4 | 0 | ||
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | 0 | 3 | 0 | ||
| LC50 Static Renewal 96Hr Acute Pimephales promelas | 0 | 3 | 0 | ||
| Noel Statre 7Day Chronic Pimephales | 0 | 3 | 0 | ||
| pH | 2 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 1 | 2 | 0 | ||
| Flow, wastewater by-passing trtmnt plant | 0 | 1 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 0 | 1 | 0 | ||
| Solids, suspended percent removal | 0 | 1 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 3 | 0 | 0 | ||
| Toxicity [chronic], Ceriodaphnia dubia | 3 | 0 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 3 | 0 | 0 | ||
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | 3 | 0 | 0 | ||
| Copper, dry weight | 1 | 0 | 0 | ||
| Cadmium, dry weight | 1 | 0 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 1 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 1 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 1 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 1 | 0 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 1 | 0 | 0 | ||
| Flow, total | 1 | 0 | 0 |
NPDES IN0020893: inspections, violations and enforcement
NPDES IN0020893: 1 single-event violation
| Date | What EPA recorded | Agency |
|---|---|---|
| June 25, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
NPDES IN0020893: 1 inspection
| Date | What EPA recorded | Agency |
|---|---|---|
| June 25, 2026 | Evaluation | S |
NPDES IN0020893: 1 informal enforcement action
| Date | What EPA recorded | Agency |
|---|---|---|
| June 25, 2026 | Notice of Noncompliance Issued | State |
NPDES IN0020893 (CORYDON WWTP): no formal enforcement action on file.
Watch NPDES IN0020893
NPDES IN0020893: one email when its EPA record changes — $99/month.
Permits near NPDES IN0020893
NPDES IN0020893: 29 pollutant rows, 3 dated events; ICIS-NPDES download, loaded October 14, 2026.