Clean Water Act discharge permit · NPDES IN0004685
IPL HARDING ST GENERATING STATION, Indianapolis, IN: NPDES IN0004685 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 32Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
IPL HARDING ST GENERATING STATION, held by IPL - HARDING ST GENERATING STATION, holds NPDES permit IN0004685, which discharges to W Fk White R & White Lick Creek. EPA’s file records it issued September 29, 2017 and expiring September 30, 2022. 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 | IPL HARDING ST GENERATING STATION |
|---|---|
| Permittee as filed | IPL - HARDING ST GENERATING STATION |
| NPDES ID | IN0004685 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 29, 2017 |
| Expiration date | September 30, 2022 |
| Issuing agency | IDEM |
| Address | Indianapolis, IN 46217 |
| Receiving water | W FK WHITE R & WHITE LICK CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Bear Creek-Pipe Creek (HUC 051201011507) |
| NAICS | 221118 – Other Electric Power Generation |
| SIC | 4911 – Electric Services |
| Other EPA IDs (FRS) | RCRA handler IND000806901; ICIS-AIR source IN0000001809700033 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 36Pollutants on file
- 32Under a numeric limit
- 24With a violation of any kind
- 11With 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 |
|---|---|---|---|---|---|
| Iron, total recoverable | 10 | 30 | 16 | November 30, 2019 | 130% over the limit |
| Oxidants, total residual | 6 | 35 | 6 | September 30, 2023 | 100% over the limit |
| Toxicity [chronic], Ceriodaphnia dubia | 0 | 5 | 5 | July 31, 2025 | 100% over the limit |
| Temperature, water deg. fahrenheit | 18 | 174 | 3 | July 31, 2012 | 8% over the limit |
| Solids, total suspended | 22 | 29 | 3 | October 31, 2017 | 76% over the limit |
| pH | 22 | 32 | 2 | May 31, 2013 | |
| Copper, total recoverable | 26 | 25 | 2 | September 30, 2017 | 33% over the limit |
| Mercury, total recoverable | 14 | 18 | 2 | October 31, 2017 | 123% over the limit |
| Oil & Grease | 0 | 12 | 2 | March 31, 1996 | 115% over the limit |
| Chlorine, total residual | 15 | 10 | 2 | September 30, 2023 | 70% over the limit |
| Chlorination duration | 5 | 4 | 2 | June 30, 2016 | 200% over the limit |
| Flow, in conduit or thru treatment plant | 10 | 36 | 0 | ||
| Streamflow | 6 | 28 | 0 | ||
| Duration of discharge | 0 | 22 | 0 | ||
| Oil and grease, hexane extr method | 22 | 14 | 0 | ||
| Iron, total [as Fe] | 0 | 10 | 0 | ||
| Zinc, total recoverable | 16 | 2 | 0 | ||
| Selenium, total recoverable | 8 | 2 | 0 | ||
| Cadmium, total recoverable | 8 | 2 | 0 | ||
| Chlorination frequency | 5 | 2 | 0 | ||
| Chromium, total recoverable | 4 | 2 | 0 | ||
| Chloride [as Cl] | 2 | 2 | 0 | ||
| Flow, total | 5 | 1 | 0 | ||
| Chlorine, total residual [dsg. time] | 4 | 1 | 0 | ||
| Sulfate, total [as SO4] | 14 | 0 | 0 | ||
| Arsenic, total recoverable | 14 | 0 | 0 | ||
| Nickel, total recoverable | 14 | 0 | 0 | ||
| Chemical Oxygen Demand [COD] | 12 | 0 | 0 | ||
| Storm water flow | 12 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 0 | 0 | ||
| Phosphorus, total [as P] | 2 | 0 | 0 | ||
| Boron, total recoverable | 2 | 0 | 0 | ||
| Aluminum, total [as Al] | 2 | 0 | 0 | ||
| Lead, total recoverable | 2 | 0 | 0 | ||
| Manganese, total recoverable | 2 | 0 | 0 | ||
| Solids, total dissolved | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IN0004685.
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.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.