Portage Wastewater Treatment Facility
Portage, WI · Columbia County · Publicly Owned Treatment Works
- Average flow
- 1.52 MGD
- Design flow
- 2 MGD
- NPDES permit
- WI0020427
- Expired
- Permit expires
- September 2021
- Population served
- 10,704
- CWNS 2022
Portage Wastewater Treatment Facility is a publicly owned wastewater treatment works in Portage, Columbia County, Wisconsin treating an average of 1.52 million gallons per day against a permitted design capacity of 2 MGD, serving about 10,704 residents. Treatment on site includes clarifiers, uncovered lagoons, biogas silos. It discharges under NPDES permit WI0020427 (expired), which expires in September 2021, with 32 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 32
- Effluent violations
- 32
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Portage
Portage's capital improvement plan lists 27 water, sewer and wastewater line items worth $51M starting 2025–2028. The largest budgeted items are shown here.
All water and sewer capital projects in Portage →
| Project | Budget | Years |
|---|---|---|
| Phosphorous Compliance Plant Upgrade | $40,000,000 | 2026–2028 |
| Replace Screw Pumps | $1,500,000 | 2027–2027 |
| C - Replace / Upgrade Ray-O-Vac Lift Station | $1,450,000 | 2026–2026 |
| Sanitary Replace TBD | $1,260,000 | 2025–2028 |
| Facilities / Phosphorous Compliance Plans Design | $1,219,400 | 2025–2025 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
2 verified contacts for Portage Wastewater Treatment Facility, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Portage Wastewater Treatment Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Wisconsin
Rio · 11 mi away
0.34 MGD
Lodi · 15 mi away
0.27 MGD
Baraboo · 15 mi away
1.29 MGD
Cambria · 16 mi away
0.08 MGD
Packwaukee · 16 mi away
0.03 MGD
Lake Delton · 17 mi away
1.4 MGD
Oxford · 18 mi away
0.03 MGD
Kingston · 18 mi away
0.01 MGD
Portage Wastewater Treatment Facility: 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 7, 2025.