St John Central Wastewater Plant
472 W 1st St, Edgard, LA 70049 · St. John The Baptist Parish County · Publicly Owned Treatment Works
- Average flow
- 0.07 MGD
- Design flow
- 0.15 MGD
- NPDES permit
- LA0080454
- Effective
- Permit expires
- April 2030
- Population served
- 1,785
- CWNS 2022
St John Central Wastewater Plant is a publicly owned wastewater treatment works in Edgard, St. John The Baptist Parish County, Louisiana treating an average of 0.07 million gallons per day against a permitted design capacity of 0.15 MGD, serving about 1,785 residents. It discharges under NPDES permit LA0080454 (effective), which expires in April 2030, with 7 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at St John Central Wastewater Plant.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 7
- Effluent violations
- 7
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at St John Central Wastewater Plant.
No verified contacts on file yet
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Nearby wastewater treatment plants in Louisiana
Reserve · 2 mi away
1.29 MGD
Edgard · 3 mi away
0.07 MGD
Garyville · 4 mi away
0.34 MGD
Hahnville · 11 mi away
1.82 MGD
St. James · 16 mi away
0.0014 MGD
Destrehan · 16 mi away
3.1 MGD
Luling · 17 mi away
1.66 MGD
Thibodaux · 18 mi away
0.63 MGD
St John Central Wastewater Plant: 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 November 27, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Tertiary treatment · Significant industrial user · all terms