Clean Water Act discharge permit · NPDES LA0045446
MAGNOLIA WATER UTILITY OPERATING CO., LLC- EDEN ISLES, Slidell, LA: NPDES LA0045446 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 19Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
MAGNOLIA WATER UTILITY OPERATING CO., LLC- EDEN ISLES, held by MAGNOLIA WATER UTILITY OPERATING CO., LLC, holds NPDES permit LA0045446, which discharges to Grand Lagoon Lake Pontchartrain. EPA’s file records it issued September 25, 2018 and expiring October 31, 2023. 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 | MAGNOLIA WATER UTILITY OPERATING CO., LLC- EDEN ISLES |
|---|---|
| Permittee as filed | MAGNOLIA WATER UTILITY OPERATING CO., LLC |
| NPDES ID | LA0045446 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 25, 2018 |
| Expiration date | October 31, 2023 |
| Address | Slidell, LA 70458 |
| Receiving water | GRAND LAGOON LAKE PONTCHARTRAIN |
| Receiving water impaired | 303(D) Listed |
| 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
- 30Pollutants on file
- 19Under a numeric limit
- 25With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 3 | 121 | 78 | July 31, 2026 | 99,999% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 137 | 71 | July 31, 2026 | 540% over the limit |
| Solids, total suspended | 4 | 131 | 64 | July 31, 2026 | 839% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 126 | 63 | July 31, 2026 | 580% over the limit |
| Enterococci | 0 | 15 | 15 | July 31, 2026 | 99,999% over the limit |
| Chlorine, total residual | 1 | 20 | 8 | August 31, 2023 | 2,900% over the limit |
| Flow, in conduit or thru treatment plant | 3 | 49 | 0 | ||
| pH | 4 | 40 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 0 | 16 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 0 | 16 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 0 | 16 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 0 | 16 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 0 | 16 | 0 | ||
| LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia) | 2 | 12 | 0 | ||
| Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia menidia | 2 | 12 | 0 | ||
| NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia) | 2 | 12 | 0 | ||
| NOAEC Lethal Static Renewal 48HR Acute Menidia menidia | 2 | 12 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 9 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute Menidia menidia | 1 | 9 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Menidia | 0 | 8 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 0 | 8 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 0 | 8 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 0 | 8 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Menidia menidia | 0 | 8 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 4 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 4 | 0 | 0 | ||
| Whole Effluent Toxicity - Retest #3 | 4 | 0 | 0 | ||
| Nitrogen, total [as N] | 3 | 0 | 0 | ||
| Phosphorus, total [as P] | 3 | 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
- 12Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 30, 2026 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| July 31, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| July 25, 2025 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| July 25, 2025 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| April 30, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| July 31, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| July 25, 2024 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| July 25, 2024 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| June 30, 2019 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| April 30, 2019 | Effluent Violations - Numeric effluent violation | ST6 |
| May 31, 2018 | Effluent Violations - Numeric effluent violation | ST6 |
| September 30, 2017 | Permit Violations - Failure to Submit Timely Permit Renewal Application | 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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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.