Green Bay Metropolitan Sewerage District
Green Bay, WI · Brown County · Publicly Owned Treatment Works
- Average flow
- 27.53 MGD
- Design flow
- —
- NPDES permit
- WIL065251
- Effective
- Permit expires
- December 2030
- Population served
- —
- CWNS 2022
Green Bay Metropolitan Sewerage District is a publicly owned wastewater treatment works in Green Bay, Brown County, Wisconsin treating an average of 27.53 million gallons per day. Treatment on site includes clarifiers, carrousels / oxidation ditches, biogas silos, biogas balloons. It discharges under NPDES permit WIL065251 (effective), which expires in December 2030, with 7 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Carrousels / oxidation ditches
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Biogas silos
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Biogas balloons
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Compliance snapshot (last 3 years)
- Total violations
- 7
- Effluent violations
- 7
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
5 verified contacts for Green Bay Metropolitan Sewerage District, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Green Bay Metropolitan Sewerage District, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Wisconsin
Oneida · 10 mi away
0.13 MGD
Little Suamico · 13 mi away
0.09 MGD
Denmark · 16 mi away
0.46 MGD
Greenleaf · 16 mi away
0.09 MGD
Wrightstown · 16 mi away
—
Seymour · 17 mi away
—
Abrams · 17 mi away
0.02 MGD
Kaukauna · 17 mi away
0.28 MGD
Green Bay Metropolitan Sewerage District: 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 July 3, 2025.