Clean Water Act discharge permit · NPDES MO0111627
DUCK CLUB YACHT CLUB WWTF, St Charles, MO: NPDES MO0111627 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
DUCK CLUB YACHT CLUB WWTF, held by Duck Club Condominium Association, Inc., holds NPDES permit MO0111627, which discharges to Mississippi. EPA’s file records it issued July 14, 2020 and expiring June 30, 2025. 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 | DUCK CLUB YACHT CLUB WWTF |
|---|---|
| Permittee as filed | Duck Club Condominium Association, Inc. |
| NPDES ID | MO0111627 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 14, 2020 |
| Expiration date | June 30, 2025 |
| Address | St Charles, MO 63301 |
| Receiving water | Mississippi |
| Subwatershed | Bolter Island-Mississippi River (HUC 071100090107) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 9Pollutants on file
- 9Under a numeric limit
- 9With a violation of any kind
- 1With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 2 | 9 | 1 | September 30, 2019 | 27% over the limit |
| pH | 2 | 8 | 0 | ||
| Solids, total suspended | 2 | 8 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 8 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 8 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 8 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 2 | 0 | ||
| Chlorine, total residual | 2 | 2 | 0 | ||
| E. coli | 2 | 2 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 2, 2026 | Reporting Violations - Failure to Submit DMRs | ST6 |
| May 10, 2022 | Effluent Violations - Narrative Effluent Violation | 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
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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 MO0111627 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.