Clean Water Act discharge permit · NPDES MORA28173
AMEREN MISSOURI - MERAMEC ENERGY CENTER, St. Louis, MO: NPDES MORA28173 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
AMEREN MISSOURI - MERAMEC ENERGY CENTER, held by Union Electric Co. d/b/a Ameren Missouri, holds NPDES permit MORA28173, which discharges to Tributary To Meramec R.. EPA’s file records it issued April 22, 2025 and expiring February 7, 2027. 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.
What the register holds for AMEREN MISSOURI - MERAMEC ENERGY CENTER: its NPDES ID, its permit type and status, its dates, its address in St. Louis, Missouri, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MORA28173.
Identity
| Facility as filed | AMEREN MISSOURI - MERAMEC ENERGY CENTER |
|---|---|
| Permittee as filed | Union Electric Co. d/b/a Ameren Missouri |
| NPDES ID | MORA28173 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Construction stormwater |
| Issued | April 22, 2025 |
| Expiration date | February 7, 2027 |
| Address | St. Louis, MO 63129 |
| Receiving water | Tributary to Meramec R. |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Carr Creek-Mississippi River (HUC 071401010603) |
| SIC | 1629 – Heavy Construction |
| Other EPA IDs (FRS) | RCRA handler MOD086817897; ICIS-AIR source MO0000002918900010 |
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
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES MORA28173.
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 MORA28173.
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
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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 MORA28173 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.