Berlin City WWTF
West Waushara St, Berlin, WI 54923 · Green Lake County · Publicly Owned Treatment Works
- Average flow
- 0.9 MGD
- Design flow
- 1.5 MGD
- NPDES permit
- WI0021229
- Expired
- Permit expires
- December 2019
- Population served
- 5,500
- CWNS 2022
Berlin City WWTF is a publicly owned wastewater treatment works in Berlin, Green Lake County, Wisconsin treating an average of 0.9 million gallons per day against a permitted design capacity of 1.5 MGD, serving about 5,500 residents. It discharges under NPDES permit WI0021229 (expired), which expires in December 2019, with 0 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Berlin City WWTF.
Available with a free Klarifi account
See the full treatment train at Berlin City WWTF: structures, unit processes and planned upgrades, with 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
2 verified contacts for Berlin City WWTF, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Berlin City WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Wisconsin
Redgranite · 9 mi away
0.15 MGD
Green Lake · 10 mi away
0.18 MGD
Ripon · 10 mi away
1.48 MGD
Poysippi · 10 mi away
0.03 MGD
Winneconne · 12 mi away
0.04 MGD
Fremont · 13 mi away
0.03 MGD
Princeton · 13 mi away
0.19 MGD
Princeton · 13 mi away
0.65 MGD
Berlin City WWTF: 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 February 28, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms