Clean Water Act discharge permit · NPDES LA0020648
PLAQUEMINE, CITY OF- SOUTH WASTEWATER TREATMENT FACILITY, Plaquemine, LA: NPDES LA0020648 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 16Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
PLAQUEMINE, CITY OF- SOUTH WASTEWATER TREATMENT FACILITY, held by City of Plaquemine- South Wastewater Treatment Plant, holds NPDES permit LA0020648, which discharges to Seg 1201 Terrebonne Basin. EPA’s file records it issued September 7, 2018 and expiring September 30, 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 | PLAQUEMINE, CITY OF- SOUTH WASTEWATER TREATMENT FACILITY |
|---|---|
| Permittee as filed | City of Plaquemine- South Wastewater Treatment Plant |
| NPDES ID | LA0020648 |
| 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 7, 2018 |
| Expiration date | September 30, 2023 |
| Address | Plaquemine, LA 70765 |
| Receiving water | SEG 1201 TERREBONNE BASIN |
| Subwatershed | Claiborne Island (HUC 080701000105) |
| 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
- 33Pollutants on file
- 16Under a numeric limit
- 31With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 0 | 33 | 24 | February 28, 2010 | 236% over the limit |
| Coliform, fecal general | 2 | 46 | 20 | December 31, 2024 | 99,999% over the limit |
| pH | 2 | 32 | 8 | February 28, 2010 | |
| Oxygen, dissolved [DO] | 0 | 10 | 7 | February 28, 2010 | 40% over the limit |
| Solids, total suspended | 3 | 42 | 6 | June 30, 2017 | 222% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 0 | 38 | 5 | February 28, 2005 | 60% over the limit |
| Whole effluent toxicity | 0 | 6 | 1 | December 31, 2007 | 44% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 1 | 1 | May 31, 2025 | 16% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 29 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 0 | 12 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 0 | 12 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 11 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 0 | 11 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 11 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 0 | 11 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 11 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 0 | 11 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 11 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 0 | 11 | 0 | ||
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 2 | 6 | 0 | ||
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 2 | 6 | 0 | ||
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 2 | 6 | 0 | ||
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 2 | 6 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute D. pulex | 1 | 6 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | 1 | 6 | 0 | ||
| Nitrogen, total [as N] | 3 | 3 | 0 | ||
| Phosphorus, total [as P] | 3 | 3 | 0 | ||
| Priority pollutants scan [yes/no] | 2 | 3 | 0 | ||
| Chlorine, total residual | 0 | 3 | 0 | ||
| Zinc, total [as Zn] | 0 | 2 | 0 | ||
| Chloroform | 0 | 2 | 0 | ||
| Whole effluent toxicity - retest #1 | 4 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 4 | 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 LA0020648.
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 LA0020648 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.