Clean Water Act discharge permit · NPDES MORA27864
O'FALLON ENERGY CENTER, O'Fallon, MO: NPDES MORA27864 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
O'FALLON ENERGY CENTER, held by Mastercard Technologies LLC, holds NPDES permit MORA27864, which discharges to Tributary To Dardenne Cr.. EPA’s file records it issued February 28, 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 O'FALLON ENERGY CENTER: its NPDES ID, its permit type and status, its dates, its address in O'Fallon, Missouri, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MORA27864.
Identity
| Facility as filed | O'FALLON ENERGY CENTER |
|---|---|
| Permittee as filed | Mastercard Technologies LLC |
| NPDES ID | MORA27864 |
| 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 | February 28, 2025 |
| Expiration date | February 7, 2027 |
| Address | O'Fallon, MO 63368 |
| Receiving water | Tributary to Dardenne Cr. |
| Subwatershed | Middle Dardenne Creek (HUC 071100090104) |
| SIC | 1629 – Heavy Construction |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
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 MORA27864.
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 MORA27864.
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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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 MORA27864 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 October 14, 2026.