Clean Water Act discharge permit · NPDES IN0020893
CORYDON WWTP, Corydon, IN: NPDES IN0020893 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 21Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
CORYDON WWTP holds NPDES permit IN0020893, which discharges to Ohio River From Indian Creek. EPA’s file records it issued April 30, 2018 and expiring June 30, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | CORYDON WWTP |
|---|---|
| Permittee as filed | CORYDON WWTP |
| NPDES ID | IN0020893 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | April 30, 2018 |
| Expiration date | June 30, 2023 |
| Issuing 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) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 29Pollutants on file
- 21Under a numeric limit
- 17With a violation of any kind
- 3With 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] | 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 |
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 IN0020893.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, IN0020893.
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 IN0020893 there.
Nearby on the register
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- Every permit record in Indiana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.