Fontana-Walworth Water Pollution Control Commission
Fontana, WI · Walworth County · Publicly Owned Treatment Works
- Average flow
- 0.9 MGD
- Design flow
- 1.45 MGD
- NPDES permit
- WI0036021
- Expired
- Permit expires
- December 2023
- Population served
- 4,603
- CWNS 2022
Fontana-Walworth Water Pollution Control Commission is a publicly owned wastewater treatment works in Fontana, Walworth County, Wisconsin treating an average of 0.9 million gallons per day against a permitted design capacity of 1.45 MGD, serving about 4,603 residents. Treatment on site includes uncovered lagoons, carrousels / oxidation ditches, biogas balloons. It discharges under NPDES permit WI0036021 (expired), which expires in December 2023, with 21 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Carrousels / oxidation ditches
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Biogas balloons
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Compliance snapshot (last 3 years)
- Total violations
- 21
- Effluent violations
- 21
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Fontana-Walworth Water Pollution Control Commission, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Fontana-Walworth Water Pollution Control Commission, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Wisconsin
Sharon · 5 mi away
0.12 MGD
Delavan · 8 mi away
—
Clinton · 11 mi away
0.17 MGD
Genoa City · 17 mi away
0.2 MGD
Beloit · 17 mi away
3.79 MGD
Genoa City · 17 mi away
0.17 MGD
Beloit · 20 mi away
0.55 MGD
Twin Lakes · 22 mi away
0.52 MGD
Fontana-Walworth Water Pollution Control Commission: 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 August 19, 2026.