Clean Water Act discharge permit · NPDES MO0004812
AMEREN MISSOURI - LABADIE ENERGY CENTER, Labadie, MO: NPDES MO0004812 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 22Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
AMEREN MISSOURI - LABADIE ENERGY CENTER, held by Union Electric Company d/b/a Ameren MO, holds NPDES permit MO0004812, which discharges to Missouri R.. EPA’s file records it issued December 1, 2021 and expiring November 30, 2026.
AMEREN MISSOURI - LABADIE ENERGY CENTER, Labadie, Missouri: Individual permit MO0004812, held by Union Electric Company d/b/a Ameren MO; Industrial stormwater; Effective; issued December 1, 2021, term to November 30, 2026; discharges to Missouri R.; Fossil Fuel Electric Power Generation.
- Solids, settleable: 0 limits, 106 violations of any kind, 84 effluent exceedances, latest November 30, 2001, largest 80,800% over the limit.
- Solids, total suspended: 12 limits, 41 violations of any kind, 37 effluent exceedances, latest June 30, 2019, largest 1,313% over the limit.
- pH: 12 limits, 34 violations of any kind, 4 effluent exceedances, latest May 31, 2020.
- Oil and grease [soxhlet extr.] tot.: 6 limits, 26 violations of any kind, 4 effluent exceedances, latest August 31, 2001, largest 60% over the limit.
- BOD, 5-day, 20 deg. C: 2 limits, 6 violations of any kind, 4 effluent exceedances, latest August 31, 2014, largest 207% over the limit.
- Thermal Discharge: 0 limits, 11 violations of any kind, 2 effluent exceedances, latest November 30, 2007, largest 116% over the limit.
- E. coli, colony forming units [CFU]: 0 limits, 2 violations of any kind, 2 effluent exceedances, latest September 30, 2020, largest 3,442% over the limit.
- Sulfate, total [as SO4]: 2 limits, 8 violations of any kind, 0 effluent exceedances.
- Mixing Zone: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- Month excursion time [min]: 3 limits, 2 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 18 limits, 0 violations of any kind, 0 effluent exceedances.
- Oxygen demand, chem. [high level] [COD]: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Temperature, water deg. fahrenheit: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Flow rate: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Nitrogen, ammonia total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Nitrite + Nitrate total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Phosphorus, total [as P]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Boron, total recoverable: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Chloride: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- E. coli: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Nitrogen, Kjeldahl, total [TKN] [water]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Freeboard: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Chlorides + Sulfates: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Toxicity [acute], Ceriodaphnia dubia: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Toxicity [acute], Pimephales promelas [Fathead Minnow]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- September 30, 2026: Reporting Violations - Improper/ Incorrect Reporting (ST6).
- September 30, 2026: Permit Violations - Violation Specified in Comment (ST6).
- September 1, 2026: Evaluation (S).
Missouri holds 210 Industrial stormwater coverages of this permit type in EPA’s file; 193 were issued before MO0004812. Union Electric Company d/b/a Ameren MO holds 2 permits in Missouri.
Other permits held by Union Electric Company d/b/a Ameren MO
- AMEREN MISSOURI - CALLAWAY ENERGY CENTER, Steedman: MO0098001, issued July 1, 2020
Coverages issued nearest MO0004812
- August 1, 2021: 3M COMPANY (NEVADA, MO), Nevada, MO0111082, held by 3M Company
- August 10, 2021: SCOTT COUNTY SANITARY LANDFILL, Benton, MO0138444, held by Scott County Sanitary Landfill
- August 30, 2021: WOODRIDGE SOUTH SUBDIVISION WWTF, Ozark, MO0119008, held by Woodridge South POA, Inc.
- October 20, 2021: FLEISCHMANN'S VINEGAR COMPANY INC., Nixa, MO0041483, held by Fleischmann's Vinegar Company, Inc.
- November 30, 2021: EATON HYDRAULIC, LLC/UNISYS, Joplin, MO0002411, held by Unisys Corporation
- December 1, 2021: CHAMP LANDFILL COMPANY, LLC, Maryland Heights, MO0097543, held by Champ Landfill Company, LLC
- January 18, 2022: HAWTHORN GENERATING STATION, Kansas City, MO0004855, held by Evergy, Inc.
- May 1, 2022: LANDMARK MANUFACTURING CORPORATION, Gallatin, MO0113671, held by Landmark Manufacturing Corporation
- July 19, 2022: HANNIBAL SANITARY LANDFILL, Hannibal, MO0112721, held by City of Hannibal
- August 15, 2022: BLACKMAN DWTP, Springfield, MO0139891, held by City Utilities of Springfield
AMEREN MISSOURI - LABADIE ENERGY CENTER among its neighbors
EPA’s permit file holds 26 discharge permits in the Labadie Creek-Missouri River subwatershed (HUC 103002000603), MO0004812 among them. Its county holds 382, 5 of them major permits; MO0004812 is a major permit.
Other permits in the Labadie Creek-Missouri River subwatershed (HUC 103002000603)
- APPLE SUMMIT I WWTF, Gray Summit: MO0092207, minor permit, discharging to Tributary to Trib. to Labadie Cr., permit term to June 30, 2026
- AUGUSTA SHORES WATER MAIN REPLACEMENT, Augusta: MORA25648, minor permit, discharging to Tributary to Klondike Lake, permit term to February 7, 2027
- AUGUSTA WWTF, Augusta: MO0121363, minor permit, discharging to Tributary to Bigelow's Cr., permit term to June 30, 2021
- BALDUCCI VINEYARDS, Augusta: MORA24750, minor permit, discharging to Tributary to Bigelow Creek, permit term to February 7, 2027
- BEAUTY VIEW ACRES WWTF, Gray Summit: MO0109177, minor permit, discharging to Trib. to Labadie Cr., permit term to June 30, 2021
- C-TAG, Villa Ridge: MORA30070, minor permit, discharging to Tributary to Trib. to Labadie Cr., permit term to February 7, 2027
- DCSD AUGUSTA SHORES WWTP, Augusta: MO0120529, minor permit, discharging to Tributary to Missouri River, permit term to June 30, 2021
- DIAMOND INN MOTEL AND RESTAURANT, Gray Summit: MO0056758, minor permit, discharging to Tributary to Trib. to Labadie Cr., permit term to June 30, 2026
- FCPWSD #3 MING ESTATES WWTP, Washington: MO0126691, minor permit, discharging to Tributary to Missouri R., permit term to June 30, 2021
- FCPWSD #3 PINE LAKE ESTATES WWTP, Gray Summit: MO0111554, minor permit, discharging to Tributary to Trib. to Labadie Cr., permit term to June 30, 2021
Identity
| Facility as filed | AMEREN MISSOURI - LABADIE ENERGY CENTER |
|---|---|
| Permittee as filed | Union Electric Company d/b/a Ameren MO |
| NPDES ID | MO0004812 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | December 1, 2021 |
| Expiration date | November 30, 2026 |
| Address | Labadie, MO 63055 |
| Receiving water | Missouri R. |
| Subwatershed | Labadie Creek-Missouri River (HUC 103002000603) |
| NAICS | 221112 – Fossil Fuel Electric Power Generation |
| SIC | 4911 – Electric Services |
| Other EPA IDs (FRS) | RCRA handler MOP000511980; ICIS-AIR source MO0000002907100003 |
Effluent limits and exceedances
- 25Pollutants on file
- 22Under a numeric limit
- 10With a violation of any kind
- 7With 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 |
|---|---|---|---|---|---|
| Solids, settleable | 0 | 106 | 84 | November 30, 2001 | 80,800% over the limit |
| Solids, total suspended | 12 | 41 | 37 | June 30, 2019 | 1,313% over the limit |
| pH | 12 | 34 | 4 | May 31, 2020 | |
| Oil and grease [soxhlet extr.] tot. | 6 | 26 | 4 | August 31, 2001 | 60% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 6 | 4 | August 31, 2014 | 207% over the limit |
| Thermal Discharge | 0 | 11 | 2 | November 30, 2007 | 116% over the limit |
| E. coli, colony forming units [CFU] | 0 | 2 | 2 | September 30, 2020 | 3,442% over the limit |
| Sulfate, total [as SO4] | 2 | 8 | 0 | ||
| Mixing Zone | 4 | 2 | 0 | ||
| Month excursion time [min] | 3 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 18 | 0 | 0 | ||
| Oxygen demand, chem. [high level] [COD] | 6 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 4 | 0 | 0 | ||
| Flow rate | 2 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 0 | 0 | ||
| Phosphorus, total [as P] | 2 | 0 | 0 | ||
| Boron, total recoverable | 2 | 0 | 0 | ||
| Chloride | 2 | 0 | 0 | ||
| E. coli | 2 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [TKN] [water] | 2 | 0 | 0 | ||
| Freeboard | 2 | 0 | 0 | ||
| Chlorides + Sulfates | 2 | 0 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 0 | 0 |
Inspections, violations and enforcement
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 30, 2026 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| September 30, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| September 1, 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
EPA’s informal enforcement file holds no action for NPDES MO0004812.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.