Erwinville WWTF
4535 Bayou Poydras Dr., Port Allen, LA 70767 · West Baton Rouge Parish County · Publicly Owned Treatment Works
- Average flow
- 0.000000093 MGD
- Design flow
- 0.13 MGD
- NPDES permit
- LA0122131
- Effective
- Permit expires
- June 2028
- Population served
- —
- CWNS 2022
Erwinville WWTF is a publicly owned wastewater treatment works in Port Allen, West Baton Rouge Parish County, Louisiana treating an average of 0.000000093 million gallons per day against a permitted design capacity of 0.13 MGD. It discharges under NPDES permit LA0122131 (effective), which expires in June 2028, with 64 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Erwinville WWTF.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 64
- Effluent violations
- 64
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Erwinville WWTF.
No verified contacts on file yet
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Nearby wastewater treatment plants in Louisiana
Maringouin · 7 mi away
0.07 MGD
Port Allen · 11 mi away
0.02 MGD
Brusly · 11 mi away
0.34 MGD
Scotlandville · 13 mi away
20.18 MGD
New Roads · 13 mi away
0.38 MGD
New Roads · 13 mi away
0.71 MGD
Port Allen · 13 mi away
0.74 MGD
Addis · 16 mi away
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Erwinville WWTF: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated October 17, 2024.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · WWTP · Biosolids · all terms