Monticello Wastewater Treatment Facility
Monticello, WI · Green County · Publicly Owned Treatment Works
- Average flow
- 0.21 MGD
- Design flow
- 0.18 MGD
- NPDES permit
- WI0024830
- Expired
- Permit expires
- March 2023
- Population served
- 1,193
- CWNS 2022
Monticello Wastewater Treatment Facility is a publicly owned wastewater treatment works in Monticello, Green County, Wisconsin treating an average of 0.21 million gallons per day against a permitted design capacity of 0.18 MGD, serving about 1,193 residents. It discharges under NPDES permit WI0024830 (expired), which expires in March 2023, with 23 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
- 23
- Effluent violations
- 23
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Monticello Wastewater Treatment Facility.
No verified contacts on file yet
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Nearby wastewater treatment plants in Wisconsin
New Glarus · 5 mi away
0.34 MGD
Belleville · 8 mi away
0.17 MGD
Monroe · 11 mi away
1.5 MGD
Brooklyn · 13 mi away
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Brodhead · 13 mi away
0.21 MGD
Argyle · 15 mi away
—
Browntown · 15 mi away
0.003 MGD
Evansville · 16 mi away
0.09 MGD
Monticello 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.