Potosi-Tennyson Sewage Commission WWTF
Potosi, WI · Grant County · Publicly Owned Treatment Works
- Average flow
- 0.22 MGD
- Design flow
- 0.33 MGD
- NPDES permit
- WI0021547
- Expired
- Permit expires
- December 2023
- Population served
- 768
- CWNS 2022
Potosi-Tennyson Sewage Commission WWTF is a publicly owned wastewater treatment works in Potosi, Grant County, Wisconsin treating an average of 0.22 million gallons per day against a permitted design capacity of 0.33 MGD, serving about 768 residents. Treatment on site includes clarifiers. It discharges under NPDES permit WI0021547 (expired), which expires in December 2023, with 22 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 22
- Effluent violations
- 22
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Potosi-Tennyson Sewage Commission WWTF, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Potosi-Tennyson Sewage Commission WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Wisconsin
Dickeyville · 7 mi away
0.06 MGD
Kieler · 8 mi away
0.1 MGD
Hazel Green · 11 mi away
0.0069 MGD
Platteville · 12 mi away
1.34 MGD
Cassville · 13 mi away
0.06 MGD
Cuba City · 16 mi away
0.14 MGD
Hazel Green · 18 mi away
0.04 MGD
Stitzer · 19 mi away
0.003 MGD
Potosi-Tennyson Sewage Commission 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 November 27, 2025.