Tri-Lakes Regional Sewer District
5240 N Old Sr 102, Columbia City, IN 46725 · Whitley County · Publicly Owned Treatment Works
- Average flow
- 0.35 MGD
- Design flow
- 0.35 MGD
- NPDES permit
- IN0055166
- Effective
- Permit expires
- September 2027
- Population served
- 1,329
- CWNS 2022
Tri-Lakes Regional Sewer District is a publicly owned wastewater treatment works in Columbia City, Whitley County, Indiana treating an average of 0.35 million gallons per day against a permitted design capacity of 0.35 MGD, serving about 1,329 residents. It discharges under NPDES permit IN0055166 (effective), which expires in September 2027, with 0 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Tri-Lakes Regional Sewer District.
Available with a free Klarifi account
See the full treatment train at Tri-Lakes Regional Sewer District: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Tri-Lakes Regional Sewer District.
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Nearby wastewater treatment plants in Indiana
Churubusco · 6 mi away
0.23 MGD
Columbia City · 7 mi away
2.48 MGD
Albion · 11 mi away
0.27 MGD
Laotto · 12 mi away
0.14 MGD
Avilla · 14 mi away
0.3 MGD
Pierceton · 14 mi away
0.22 MGD
South Whitley · 15 mi away
0.16 MGD
Cromwell · 16 mi away
0.1 MGD
Tri-Lakes Regional Sewer District: 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 7, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms