Clean Water Act discharge permit · NPDES LA0126950
NWI, LLC- ULTIMA PLAZA STP, Prairieville, LA: NPDES LA0126950 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
NWI, LLC- ULTIMA PLAZA STP, held by Ascension Wastewater Treatment, Inc. - Ultima Plaza, holds NPDES permit LA0126950. EPA’s file records it issued March 27, 2015 and expiring April 30, 2020. 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.
Identity
| Facility as filed | NWI, LLC- ULTIMA PLAZA STP |
|---|---|
| Permittee as filed | Ascension Wastewater Treatment, Inc. - Ultima Plaza |
| NPDES ID | LA0126950 |
| 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 | March 27, 2015 |
| Expiration date | April 30, 2020 |
| Address | Prairieville, LA 70769 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Bayou Fountain-Bayou Manchac (HUC 080702020804) |
| SIC | 4952 – Sewerage Systems |
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
- 12Pollutants on file
- 10Under a numeric limit
- 10With a violation of any kind
- 7With 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] | 13 | 120 | 57 | June 30, 2026 | 620% over the limit |
| Nitrogen, ammonia total [as N] | 13 | 95 | 32 | July 31, 2025 | 670% over the limit |
| Solids, total suspended | 13 | 90 | 27 | June 30, 2024 | 1,443% over the limit |
| Coliform, fecal general | 12 | 45 | 7 | August 31, 2025 | 607% over the limit |
| Oil and grease | 4 | 20 | 2 | September 30, 2018 | 192% over the limit |
| Chlorine, total residual | 0 | 2 | 2 | June 30, 2026 | 5,961% over the limit |
| Oil & Grease | 0 | 1 | 1 | April 30, 2025 | 313% over the limit |
| Flow, in conduit or thru treatment plant | 16 | 86 | 0 | ||
| pH | 12 | 36 | 0 | ||
| Oxygen, dissolved [DO] | 5 | 27 | 0 | ||
| Nitrogen, total [as N] | 17 | 0 | 0 | ||
| Phosphorus, total [as P] | 17 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 27, 2018 | Permit Violations - Application Incomplete | ST6 |
| September 14, 2018 | Effluent Violations - Unauthorized Discharge | ST6 |
| September 14, 2018 | Permit Violations - Unapproved Operation | ST6 |
| July 12, 2018 | Management Practice Violations - Improper Operation and Maintenance | 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.
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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 LA0126950 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.