Dane Iowa Wastewater Commission WWTF
Mazomanie, WI · Dane County · Publicly Owned Treatment Works
- Average flow
- 0.34 MGD
- Design flow
- —
- NPDES permit
- WI0049816
- Expired
- Permit expires
- September 2022
- Population served
- 3,985
- CWNS 2022
Dane Iowa Wastewater Commission WWTF is a publicly owned wastewater treatment works in Mazomanie, Dane County, Wisconsin treating an average of 0.34 million gallons per day, serving about 3,985 residents. Treatment on site includes carrousels / oxidation ditches, biogas balloons. It discharges under NPDES permit WI0049816 (expired), which expires in September 2022, with 0 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
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Dane Iowa Wastewater Commission WWTF.
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Nearby wastewater treatment plants in Wisconsin
Cross Plains · 9 mi away
0.4 MGD
Sauk City · 9 mi away
0.01 MGD
Blue Mounds · 11 mi away
0.03 MGD
Spring Green · 13 mi away
0.14 MGD
Mount Horeb · 13 mi away
—
Lodi · 18 mi away
0.27 MGD
North Freedom · 20 mi away
0.02 MGD
Baraboo · 20 mi away
1.29 MGD
Dane Iowa Wastewater 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 March 6, 2025.