Oneida WWTF
Oneida, WI 54155 · Brown County · Publicly Owned Treatment Works
- Average flow
- 0.17 MGD
- Design flow
- 0.3 MGD
- NPDES permit
- WI0071323
- Effective
- Permit expires
- April 2028
- Population served
- —
- CWNS 2022
Oneida WWTF is a publicly owned wastewater treatment works in Oneida, Brown County, Wisconsin treating an average of 0.17 million gallons per day against a permitted design capacity of 0.3 MGD. It discharges under NPDES permit WI0071323 (effective), which expires in April 2028, with 12 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in April 2025.
Treatment technology
Treatment structures and unit processes at Oneida WWTF.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 12
- Effluent violations
- 12
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Oneida WWTF in EPA's ICIS system.
- Formal actions
- 1
- 1 since FY2020
- Compliance actions
- $1.1M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Apr 2025
Oneida WWTP AOC
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $1.1M
EPA's description of the case:
“Final AOC for the Oneida WWTP”
Source: EPA ECHO, civil enforcement case 05-2023-0302.
Full case history with a free Klarifi account
Every action against Oneida WWTF with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
1 verified contact for Oneida WWTF, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Oneida WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Wisconsin
Kaukauna · 9 mi away
0.34 MGD
Green Bay · 10 mi away
36.81 MGD
Wrightstown · 12 mi away
0.29 MGD
Black Creek · 13 mi away
0.4 MGD
Greenleaf · 14 mi away
—
Nichols · 14 mi away
0.02 MGD
Kaukauna · 16 mi away
4.54 MGD
Little Suamico · 18 mi away
0.13 MGD
Oneida 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 November 26, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms