Town Of Leonville WWTP
2499 Highway 347, Arnaudville, LA 70512 · St. Landry County · Publicly Owned Treatment Works
- Average flow
- 0.06 MGD
- Design flow
- 0.9 MGD
- NPDES permit
- LA0114740
- Effective
- Permit expires
- September 2028
- Population served
- —
- CWNS 2022
Town Of Leonville WWTP is a publicly owned wastewater treatment works in Arnaudville, St. Landry County, Louisiana treating an average of 0.06 million gallons per day against a permitted design capacity of 0.9 MGD. It discharges under NPDES permit LA0114740 (effective), which expires in September 2028, with 50 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Town Of Leonville WWTP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 50
- Effluent violations
- 50
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Town Of Leonville WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Louisiana
Arnaudville · 5 mi away
0.14 MGD
Grand Coteau · 5 mi away
0.27 MGD
Opelousas · 6 mi away
0.08 MGD
Port Barre · 6 mi away
—
Sunset · 7 mi away
—
Opelousas · 7 mi away
0.04 MGD
Opelousas · 8 mi away
2.52 MGD
Carencro · 11 mi away
0.64 MGD
Town Of Leonville WWTP: 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 July 18, 2023.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms