Cashton Wastewater Treatment Facility
Cashton, WI · Monroe County · Publicly Owned Treatment Works
- Average flow
- 0.08 MGD
- Design flow
- 0.21 MGD
- NPDES permit
- WI0020915
- Expired
- Permit expires
- March 2026
- Population served
- 1,225
- CWNS 2022
Cashton Wastewater Treatment Facility is a publicly owned wastewater treatment works in Cashton, Monroe County, Wisconsin treating an average of 0.08 million gallons per day against a permitted design capacity of 0.21 MGD, serving about 1,225 residents. It discharges under NPDES permit WI0020915 (expired), which expires in March 2026, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
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 Cashton Wastewater Treatment Facility.
No verified contacts on file yet
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Nearby wastewater treatment plants in Wisconsin
Norwalk · 10 mi away
0.02 MGD
Coon Valley · 12 mi away
0.12 MGD
Sparta · 13 mi away
1.51 MGD
Wilton · 13 mi away
0.03 MGD
La Farge · 14 mi away
0.04 MGD
Chaseburg · 17 mi away
0.05 MGD
Viola · 17 mi away
0.05 MGD
West Salem · 18 mi away
0.0055 MGD
Cashton 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 October 6, 2025.