Clean Water Act discharge permit · NPDES MOG640236
MAWC, SOUTH WTP, St Louis, MO: NPDES MOG640236 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 4Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
MAWC, SOUTH WTP, held by Missouri American Water, holds NPDES permit MOG640236, which discharges to Tributary To Meramec R.. EPA’s file records it issued May 1, 2024 and expiring February 24, 2029. 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 | MAWC, SOUTH WTP |
|---|---|
| Permittee as filed | Missouri American Water |
| NPDES ID | MOG640236 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | May 1, 2024 |
| Expiration date | February 24, 2029 |
| Address | St Louis, MO 63127 |
| Receiving water | Tributary to Meramec R. |
| Subwatershed | Sugar Creek-Meramec River (HUC 071401021003) |
| Other EPA IDs (FRS) | RCRA handler MOP000511915 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 4Pollutants on file
- 4Under a numeric limit
- 2With a violation of any kind
- 0With 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 | 2 | 12 | 0 | ||
| Chlorine, total residual | 2 | 12 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MOG640236.
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 MOG640236.
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 MOG640236 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.