Consolidated Koshkonong Sanitary District Site
Edgerton, WI · Rock County · Publicly Owned Treatment Works
- Average flow
- 0.49 MGD
- Design flow
- 0.6 MGD
- NPDES permit
- WI0021059
- Expired
- Permit expires
- September 2023
- Population served
- 2,819
- CWNS 2022
Consolidated Koshkonong Sanitary District Site is a publicly owned wastewater treatment plant in Edgerton, Rock County, Wisconsin treating an average of 0.49 million gallons per day against a permitted design capacity of 0.6 MGD, serving about 2,819 residents. Treatment on site includes covered lagoons. It discharges under NPDES permit WI0021059 (expired), which expires in September 2023, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Covered lagoons
Unlock
Unlock exact unit counts →
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 Consolidated Koshkonong Sanitary District Site.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in Wisconsin
Edgerton · 2 mi away
0.47 MGD
Milton · 5 mi away
0.34 MGD
Rockdale · 11 mi away
0.01 MGD
Fort Atkinson · 11 mi away
—
Stoughton · 11 mi away
1.06 MGD
Janesville · 12 mi away
9.98 MGD
Evansville · 13 mi away
0.09 MGD
Hanover · 13 mi away
0.0016 MGD
Consolidated Koshkonong Sanitary District Site: 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 6, 2025.