Addis Wastewater Treatment Plant
Addis, LA · West Baton Rouge County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.17 MGD
- NPDES permit
- LA0089257
- Effective
- Permit expires
- October 2026
- Population served
- 1,228
- CWNS 2022
Addis Wastewater Treatment Plant is a publicly owned wastewater treatment works in Addis, West Baton Rouge County, Louisiana, serving about 1,228 residents. Treatment on site includes carrousels / oxidation ditches. It discharges under NPDES permit LA0089257 (effective), which expires in October 2026, with 31 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Carrousels / oxidation ditches
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Compliance snapshot (last 3 years)
- Total violations
- 31
- Effluent violations
- 25
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Addis Wastewater Treatment Plant.
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Plaquemine · 4 mi away
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Brusly · 5 mi away
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Baton Rouge · 7 mi away
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Port Allen · 7 mi away
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Port Allen · 8 mi away
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Sunshine · 9 mi away
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Saint Gabriel · 12 mi away
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Scotlandville · 13 mi away
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Addis Wastewater Treatment 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 September 11, 2026; facility record last updated May 19, 2025.