Clean Water Act discharge permit · NPDES LA0122645
TIMBER BRANCH II STP, Mandeville, LA: NPDES LA0122645 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
TIMBER BRANCH II STP, held by ST. TAMMANY PARISH GOVERNMENT, holds NPDES permit LA0122645. EPA’s file records it issued July 15, 2014 and expiring July 31, 2019. 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 | TIMBER BRANCH II STP |
|---|---|
| Permittee as filed | ST. TAMMANY PARISH GOVERNMENT |
| NPDES ID | LA0122645 |
| 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 |
| Program | Publicly owned treatment works |
| Issued | July 15, 2014 |
| Expiration date | July 31, 2019 |
| Address | Mandeville, LA 70448 |
| Subwatershed | Soap and Tallow Branch-Tchefuncta River (HUC 080902010204) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 6Under a numeric limit
- 6With a violation of any kind
- 3With 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, carbonaceous [5 day, 20 C] | 3 | 11 | 11 | May 31, 2024 | 200% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 7 | 7 | December 31, 2024 | 138% over the limit |
| Coliform, fecal general | 2 | 2 | 2 | June 30, 2023 | 316% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 6 | 0 | ||
| Nitrogen, total [as N] | 0 | 3 | 0 | ||
| Phosphorus, total [as P] | 0 | 3 | 0 | ||
| Solids, total suspended | 3 | 0 | 0 | ||
| pH | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES LA0122645.
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 LA0122645 there.
Nearby on the register
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- Every permit record in Mandeville, A to Z
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- Every permit record in Louisiana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.