Clean Water Act discharge permit · NPDES LA0073539
ST. CHARLES PARISH COUNCIL--DESTREHAN WWTP, Destrehan, LA: NPDES LA0073539 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 17Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
ST. CHARLES PARISH COUNCIL--DESTREHAN WWTP, held by St. Charles Parish Wastewater Dept--Destrehan WWTP, holds NPDES permit LA0073539, which discharges to Mississippi River. EPA’s file records it issued September 29, 2016 and expiring October 31, 2021. 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 | ST. CHARLES PARISH COUNCIL--DESTREHAN WWTP |
|---|---|
| Permittee as filed | St. Charles Parish Wastewater Dept--Destrehan WWTP |
| NPDES ID | LA0073539 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 29, 2016 |
| Expiration date | October 31, 2021 |
| Address | Destrehan, LA 70047 |
| Receiving water | MISSISSIPPI RIVER |
| Subwatershed | Mississippi River-Bonnet Carre Spillway (HUC 080901000101) |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler LAR000045567 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 20Pollutants on file
- 17Under a numeric limit
- 12With a violation of any kind
- 4With 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 | 2 | 11 | 7 | February 28, 2023 | 1,950% over the limit |
| Solids, total suspended | 3 | 12 | 6 | December 31, 1999 | 53% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 10 | 4 | December 31, 1999 | 29% over the limit |
| pH | 2 | 8 | 2 | May 31, 2011 | |
| Flow, in conduit or thru treatment plant | 2 | 20 | 0 | ||
| Turbidity | 0 | 16 | 0 | ||
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 2 | 2 | 0 | ||
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 2 | 2 | 0 | ||
| Priority pollutants scan [yes/no] | 1 | 2 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | 1 | 1 | 0 | ||
| Carbon, tot organic [TOC] | 0 | 1 | 0 | ||
| Oil and grease | 0 | 1 | 0 | ||
| Nitrogen, total [as N] | 6 | 0 | 0 | ||
| Phosphorus, total [as P] | 6 | 0 | 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 | ||
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 2 | 0 | 0 | ||
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 2 | 0 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute D. pulex | 1 | 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
- 18Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 11, 2025 | Failure to minimize or prevent SSO to waters of the U.S. - adverse impacts [40 CFR 122.41(d)] | ST6 |
| June 11, 2025 | Failure to properly operate and maintain the sanitary sewer system [40 CFR 122.41(e)] | ST6 |
| November 21, 2022 | Failure to minimize or prevent SSO to waters of the U.S. - adverse impacts [40 CFR 122.41(d)] | ST6 |
| November 21, 2022 | Failure to properly operate and maintain the sanitary sewer system [40 CFR 122.41(e)] | ST6 |
| November 22, 2021 | WW SSO - Discharge to Waters | ST6 |
| November 22, 2021 | WW SSO - Improper Operation and Maintenance | ST6 |
| August 4, 2021 | WW SSO - Discharge to Waters | ST6 |
| June 21, 2021 | WW SSO - Improper Operation and Maintenance | ST6 |
| April 16, 2021 | WW SSO - Discharge to Waters | ST6 |
| April 16, 2021 | WW SSO - Improper Operation and Maintenance | ST6 |
| April 23, 2020 | WW SSO - Discharge to Waters | ST6 |
| April 23, 2020 | WW SSO - Improper Operation and Maintenance | ST6 |
| February 11, 2020 | WW SSO - Discharge to Waters | ST6 |
| February 11, 2020 | WW SSO - Improper Operation and Maintenance | ST6 |
| December 28, 2018 | WW SSO - Discharge to Waters | ST6 |
| August 17, 2018 | WW SSO - Improper Operation and Maintenance | ST6 |
| January 31, 2018 | WW SSO - Discharge to Waters | ST6 |
| January 31, 2018 | WW SSO - 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 LA0073539 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.