Clean Water Act discharge permit · NPDES MO0000043
AMEREN MISSOURI - RUSH ISLAND POWER, Festus, MO: NPDES MO0000043 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 28Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
AMEREN MISSOURI - RUSH ISLAND POWER, held by Ameren Missouri, holds NPDES permit MO0000043, which discharges to Tributary To Mississippi R.. EPA’s file records it issued February 22, 2019 and expiring February 29, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | AMEREN MISSOURI - RUSH ISLAND POWER |
|---|---|
| Permittee as filed | Ameren Missouri |
| NPDES ID | MO0000043 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | February 22, 2019 |
| Expiration date | February 29, 2024 |
| Address | Festus, MO 63028 |
| Receiving water | Tributary to Mississippi R. |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Old Maeystown Creek-Mississippi River (HUC 071401010904) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 28Pollutants on file
- 28Under a numeric limit
- 7With a violation of any kind
- 4With 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, total suspended | 18 | 12 | 10 | November 30, 2024 | 318% over the limit |
| Thermal Discharge | 2 | 138 | 2 | April 30, 2005 | 1% over the limit |
| E. coli | 2 | 2 | 2 | December 31, 2023 | 224% over the limit |
| pH | 10 | 7 | 1 | May 31, 2025 | |
| Oil and grease [soxhlet extr.] tot. | 8 | 4 | 0 | ||
| Toxicity [chronic], Ceriodaphnia dubia | 2 | 2 | 0 | ||
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | 2 | 2 | 0 | ||
| Temperature, water deg. fahrenheit | 22 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 12 | 0 | 0 | ||
| Oxygen demand, chem. [high level] [COD] | 8 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 6 | 0 | 0 | ||
| Nitrogen, total [as N] | 4 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 0 | 0 | ||
| Phosphorus, total [as P] | 4 | 0 | 0 | ||
| Sulfate, total [as SO4] | 4 | 0 | 0 | ||
| Iron, total recoverable | 4 | 0 | 0 | ||
| Boron, total recoverable | 4 | 0 | 0 | ||
| Aluminum, total recoverable | 4 | 0 | 0 | ||
| Molybdenum, total recoverable | 4 | 0 | 0 | ||
| Temp. diff. between up/down stream deg. F | 4 | 0 | 0 | ||
| Chloride | 4 | 0 | 0 | ||
| Chlorides + Sulfates | 4 | 0 | 0 | ||
| Month excursion time [min] | 3 | 0 | 0 | ||
| Flow rate | 2 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 0 | 0 | ||
| Thermal Discharge | 2 | 0 | 0 | ||
| Flow, process wastewater | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 3, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
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.
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, MO0000043.
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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 MO0000043 there.
Nearby on the register
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- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.