Spencer Waterworks
610 East Depot Street, Spencer, WI 54479 · Marathon County · Publicly Owned Treatment Works
- Average flow
- 0.23 MGD
- Design flow
- 0.29 MGD
- NPDES permit
- WI0021521
- Expired
- Permit expires
- June 2024
- Population served
- 2,042
- CWNS 2022
Spencer Waterworks is a publicly owned wastewater treatment plant in Spencer, Marathon County, Wisconsin treating an average of 0.23 million gallons per day against a permitted design capacity of 0.29 MGD, serving about 2,042 residents. It discharges under NPDES permit WI0021521 (expired), which expires in June 2024, with 1 recorded violation in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Spencer Waterworks.
Available with a free Klarifi account
See the full treatment train at Spencer Waterworks: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Spencer Waterworks.
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Nearby wastewater treatment plants in Wisconsin
Unity · 7 mi away
0.05 MGD
Colby · 10 mi away
0.19 MGD
Marshfield · 11 mi away
2.9 MGD
Stratford · 11 mi away
0.14 MGD
Stratford · 13 mi away
0.07 MGD
Granton · 14 mi away
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Curtiss · 15 mi away
—
Fenwood · 15 mi away
0.05 MGD
Spencer Waterworks: 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 March 11, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms