Clean Water Act discharge permit · NPDES IN0050296
HALLADOR POWER COMPANY LLC - MEROM GENERATING STATION, Merom, IN: NPDES IN0050296 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 31Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
- 2Inspections on file
- 0Formal enforcement actions
HALLADOR POWER COMPANY LLC - MEROM GENERATING STATION, held by HOOSIER ENERGY - MEROM GENERATING STATION, holds NPDES permit IN0050296, which discharges to Wabash R Via Turtle Cr Reservoir. EPA’s file records it issued February 1, 2016 and expiring January 31, 2021.
HALLADOR POWER COMPANY LLC - MEROM GENERATING STATION, Merom, Indiana: Individual permit IN0050296, held by HOOSIER ENERGY - MEROM GENERATING STATION; Administratively continued (past its expiration date and still in force until reissued); issued February 1, 2016, term to January 31, 2021, by IDEM; discharges to WABASH R VIA TURTLE CR RESERVOIR; Electric Power Distribution.
- Iron, total recoverable: 2 limits, 32 violations of any kind, 29 effluent exceedances, latest October 31, 2023, largest 1,880% over the limit.
- Solids, total suspended: 24 limits, 30 violations of any kind, 29 effluent exceedances, latest August 31, 2024, largest 6,353% over the limit.
- Temperature, water deg. fahrenheit: 9 limits, 25 violations of any kind, 25 effluent exceedances, latest April 30, 2026, largest 19% over the limit.
- pH: 30 limits, 17 violations of any kind, 13 effluent exceedances, latest June 30, 2026.
- Nitrogen, ammonia total [as N]: 4 limits, 10 violations of any kind, 10 effluent exceedances, latest February 28, 2023, largest 767% over the limit.
- Chlorine, total residual: 0 limits, 6 violations of any kind, 6 effluent exceedances, latest February 28, 2021, largest 150% over the limit.
- Oil & Grease: 0 limits, 4 violations of any kind, 4 effluent exceedances, latest July 31, 2009, largest 420% over the limit.
- Oil and grease, hexane extr method: 16 limits, 3 violations of any kind, 2 effluent exceedances, latest March 31, 2021, largest 33% over the limit.
- Flow, in conduit or thru treatment plant: 18 limits, 2 violations of any kind, 2 effluent exceedances, latest February 28, 2026, largest 11% over the limit.
- Copper, total recoverable: 17 limits, 4 violations of any kind, 1 effluent exceedance, latest May 31, 2004, largest 760% over the limit.
- E. coli, colony forming units [CFU]: 3 limits, 1 violation of any kind, 1 effluent exceedance, latest April 30, 2011, largest 96% over the limit.
- Nitrite + Nitrate total [as N]: 22 limits, 5 violations of any kind, 0 effluent exceedances.
- Mercury, total recoverable: 22 limits, 3 violations of any kind, 0 effluent exceedances.
- BOD, carbonaceous [5 day, 20 C]: 14 limits, 1 violation of any kind, 0 effluent exceedances.
- Phosphorus, total [as P]: 13 limits, 1 violation of any kind, 0 effluent exceedances.
- Nitrogen, Kjeldahl, total [as N]: 12 limits, 1 violation of any kind, 0 effluent exceedances.
- Chemical Oxygen Demand [COD]: 12 limits, 1 violation of any kind, 0 effluent exceedances.
- Storm water flow: 12 limits, 1 violation of any kind, 0 effluent exceedances.
- Selenium, total recoverable: 25 limits, 0 violations of any kind, 0 effluent exceedances.
- Arsenic, total recoverable: 16 limits, 0 violations of any kind, 0 effluent exceedances.
- Boron, total recoverable: 15 limits, 0 violations of any kind, 0 effluent exceedances.
- Sulfate, total [as SO4]: 14 limits, 0 violations of any kind, 0 effluent exceedances.
- Nickel, total recoverable: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Zinc, total recoverable: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Cadmium, total recoverable: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Lead, total recoverable: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Chromium, total recoverable: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Chloride [as Cl]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Number of Events: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Temperature rise, length of excursion: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Temperature, length of excursion: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Flow, total: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Month excursion time [min]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- March 30, 2026: Effluent Violations - Numeric effluent violation (ST6).
- March 30, 2026: Evaluation (S).
- March 30, 2026: Evaluation (S).
- March 30, 2026: Notice of Noncompliance Issued (State).
HALLADOR POWER COMPANY LLC - MEROM GENERATING STATION among its neighbors
EPA’s permit file holds 4 discharge permits in the Turtle Creek Lake-Turtle Creek subwatershed (HUC 051201111601), IN0050296 among them. Its county holds 34, 2 of them major permits; IN0050296 is a major permit.
Other permits in the Turtle Creek Lake-Turtle Creek subwatershed (HUC 051201111601)
- ABOUTBIT SITE 1, Merom: INRA10370, minor permit, permit term to August 25, 2027
- HOOSIER ENERGY RURAL ELECTRIC COOPERATIVE, INC., Sullivan: INRA14537, minor permit, permit term to August 27, 2029
- RURAL ACADEMY, Graysville: INRA16083, minor permit, permit term to May 20, 2030
Identity
| Facility as filed | HALLADOR POWER COMPANY LLC - MEROM GENERATING STATION |
|---|---|
| Permittee as filed | HOOSIER ENERGY - MEROM GENERATING STATION |
| NPDES ID | IN0050296 |
| 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 | February 1, 2016 |
| Expiration date | January 31, 2021 |
| Issuing agency | IDEM |
| Address | Merom, IN 47882 |
| Receiving water | WABASH R VIA TURTLE CR RESERVOIR |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Turtle Creek Lake-Turtle Creek (HUC 051201111601) |
| NAICS | 221122 – Electric Power Distribution |
| SIC | 4911 – Electric Services |
Effluent limits and exceedances
- 33Pollutants on file
- 31Under a numeric limit
- 18With 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 | 2 | 32 | 29 | October 31, 2023 | 1,880% over the limit |
| Solids, total suspended | 24 | 30 | 29 | August 31, 2024 | 6,353% over the limit |
| Temperature, water deg. fahrenheit | 9 | 25 | 25 | April 30, 2026 | 19% over the limit |
| pH | 30 | 17 | 13 | June 30, 2026 | |
| Nitrogen, ammonia total [as N] | 4 | 10 | 10 | February 28, 2023 | 767% over the limit |
| Chlorine, total residual | 0 | 6 | 6 | February 28, 2021 | 150% over the limit |
| Oil & Grease | 0 | 4 | 4 | July 31, 2009 | 420% over the limit |
| Oil and grease, hexane extr method | 16 | 3 | 2 | March 31, 2021 | 33% over the limit |
| Flow, in conduit or thru treatment plant | 18 | 2 | 2 | February 28, 2026 | 11% over the limit |
| Copper, total recoverable | 17 | 4 | 1 | May 31, 2004 | 760% over the limit |
| E. coli, colony forming units [CFU] | 3 | 1 | 1 | April 30, 2011 | 96% over the limit |
| Nitrite + Nitrate total [as N] | 22 | 5 | 0 | ||
| Mercury, total recoverable | 22 | 3 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 14 | 1 | 0 | ||
| Phosphorus, total [as P] | 13 | 1 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 12 | 1 | 0 | ||
| Chemical Oxygen Demand [COD] | 12 | 1 | 0 | ||
| Storm water flow | 12 | 1 | 0 | ||
| Selenium, total recoverable | 25 | 0 | 0 | ||
| Arsenic, total recoverable | 16 | 0 | 0 | ||
| Boron, total recoverable | 15 | 0 | 0 | ||
| Sulfate, total [as SO4] | 14 | 0 | 0 | ||
| Nickel, total recoverable | 6 | 0 | 0 | ||
| Zinc, total recoverable | 6 | 0 | 0 | ||
| Cadmium, total recoverable | 6 | 0 | 0 | ||
| Lead, total recoverable | 6 | 0 | 0 | ||
| Chromium, total recoverable | 6 | 0 | 0 | ||
| Chloride [as Cl] | 2 | 0 | 0 | ||
| Number of Events | 2 | 0 | 0 | ||
| Temperature rise, length of excursion | 1 | 0 | 0 | ||
| Temperature, length of excursion | 1 | 0 | 0 | ||
| Flow, total | 1 | 0 | 0 | ||
| Month excursion time [min] | 1 | 0 | 0 |
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 30, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| March 30, 2026 | Evaluation | S |
| March 30, 2026 | Evaluation | S |
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| March 30, 2026 | Notice of Noncompliance Issued | State |
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.