Clean Water Act discharge permit · NPDES LA0120235
WEST ST TAMMANY REGIONAL STP, Madisonville, LA: NPDES LA0120235 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 26Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
WEST ST TAMMANY REGIONAL STP, held by ST. TAMMANY PARISH GOVERNMENT, holds NPDES permit LA0120235. EPA’s file records it issued May 27, 2016 and expiring June 30, 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 | WEST ST TAMMANY REGIONAL STP |
|---|---|
| Permittee as filed | ST. TAMMANY PARISH GOVERNMENT |
| NPDES ID | LA0120235 |
| 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 | May 27, 2016 |
| Expiration date | June 30, 2021 |
| Address | Madisonville, LA 70447 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Bedico Creek (HUC 080702050402) |
| SIC | 1382 – Oil And Gas Exploration Services |
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
- 26Pollutants on file
- 26Under a numeric limit
- 10With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 2 | 20 | 8 | May 31, 2026 | 411% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 25 | 7 | April 30, 2025 | 167% over the limit |
| Solids, total suspended | 3 | 20 | 2 | December 31, 2023 | 30% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 18 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 17 | 0 | ||
| pH | 2 | 12 | 0 | ||
| Chlorine, total residual | 1 | 7 | 0 | ||
| Chloride [as Cl] | 3 | 3 | 0 | ||
| Sulfate, total [as SO4] | 3 | 3 | 0 | ||
| Solids, total dissolved | 3 | 3 | 0 | ||
| Whole effluent toxicity - retest #1 | 8 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 8 | 0 | 0 | ||
| WET, sublethal retest #1 | 8 | 0 | 0 | ||
| WET, sublethal retest #2 | 8 | 0 | 0 | ||
| Whole Effluent Toxicity - Retest #3 | 8 | 0 | 0 | ||
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 8 | 0 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 0 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 4 | 0 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 0 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 4 | 0 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 0 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 0 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 0 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 0 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 2 | 0 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 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
- 16Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 12, 2024 | Failure to properly operate and maintain the sanitary sewer system [40 CFR 122.41(e)] | ST6 |
| September 12, 2024 | Other noncompliance related to a sanitary sewer system or releases from a sanitary sewer system | ST6 |
| October 24, 2022 | Failure to minimize or prevent SSO to waters of the U.S. - adverse impacts [40 CFR 122.41(d)] | ST6 |
| October 18, 2021 | Failure to minimize or prevent SSO to waters of the U.S. - adverse impacts [40 CFR 122.41(d)] | ST6 |
| January 2, 2021 | Failure to properly operate and maintain the sanitary sewer system [40 CFR 122.41(e)] | ST6 |
| January 2, 2021 | Other noncompliance related to a sanitary sewer system or releases from a sanitary sewer system | ST6 |
| November 30, 2020 | WW SSO - Discharge to Waters | ST6 |
| November 30, 2020 | WW SSO - Improper Operation and Maintenance | ST6 |
| August 5, 2020 | Reporting Violations - Failure to Notify | ST6 |
| August 5, 2020 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| March 31, 2019 | WW SSO - Discharge to Waters | ST6 |
| March 31, 2019 | WW SSO - Improper Operation and Maintenance | ST6 |
| February 28, 2019 | WW SSO - Improper Operation and Maintenance | ST6 |
| April 30, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
| March 31, 2017 | WW SSO - Improper Operation and Maintenance | ST6 |
| March 31, 2017 | Permit Violations - Violation Specified in Comment | 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.