Denmark Wastewater Treatment Facility
400 Mahlik Lane, Denmark, WI 54208 · Brown County · Publicly Owned Treatment Works
- Average flow
- 0.57 MGD
- Design flow
- 0.5 MGD
- NPDES permit
- WI0021741
- Expired
- Permit expires
- September 2023
- Population served
- 2,108
- CWNS 2022
Denmark Wastewater Treatment Facility is a publicly owned wastewater treatment works in Denmark, Brown County, Wisconsin treating an average of 0.57 million gallons per day against a permitted design capacity of 0.5 MGD, serving about 2,108 residents. It discharges under NPDES permit WI0021741 (expired), which expires in September 2023, with 59 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Denmark Wastewater Treatment Facility.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 59
- Effluent violations
- 59
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Denmark Wastewater Treatment Facility.
No verified contacts on file yet
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Maribel · 5 mi away
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Manitowoc · 14 mi away
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Greenleaf · 15 mi away
—
Green Bay · 16 mi away
36.81 MGD
Reedsville · 16 mi away
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Casco · 17 mi away
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Wrightstown · 17 mi away
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Brillion · 18 mi away
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Denmark 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 October 26, 2026; facility record last updated October 6, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms