Columbus City WWTF
Columbus, WI · Columbia County · Publicly Owned Treatment Works
- Average flow
- 1.03 MGD
- Design flow
- 1 MGD
- NPDES permit
- WI0021008
- Expired
- Permit expires
- June 2025
- Population served
- 6,126
- CWNS 2022
Columbus City WWTF is a publicly owned wastewater treatment works in Columbus, Columbia County, Wisconsin treating an average of 1.03 million gallons per day against a permitted design capacity of 1 MGD, serving about 6,126 residents. Treatment on site includes biogas balloons. It discharges under NPDES permit WI0021008 (expired), which expires in June 2025, with 2 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Biogas balloons
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Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Columbus City WWTF, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Columbus City WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Wisconsin
Reeseville · 9 mi away
0.16 MGD
Lowell · 10 mi away
0.02 MGD
Marshall · 11 mi away
0.37 MGD
Randolph · 14 mi away
—
Rio · 15 mi away
0.34 MGD
Clyman · 15 mi away
0.02 MGD
Juneau · 16 mi away
—
Cambria · 16 mi away
0.08 MGD
Columbus City 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 September 11, 2026; facility record last updated March 2, 2025.