Oxford City Of STP
Oxford, IA 52322 · Johnson County · Publicly Owned Treatment Works
- Average flow
- 0.12 MGD
- Design flow
- 0.26 MGD
- NPDES permit
- IA0032531
- Administratively continued
- Permit expires
- December 2025
- Population served
- 722
- CWNS 2022
Oxford City Of STP is a publicly owned wastewater treatment works in Oxford, Johnson County, Iowa treating an average of 0.12 million gallons per day against a permitted design capacity of 0.26 MGD, serving about 722 residents. It discharges under NPDES permit IA0032531 (administratively continued), which expires in December 2025, with 22 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in August 2017.
Treatment technology
Treatment structures and unit processes at Oxford City Of STP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 22
- Effluent violations
- 5
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 Oxford City Of STP in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Compliance actions
- $735,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Aug 2017
CITY OF OXFORD
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $735,000
Source: EPA ECHO, civil enforcement case 07-2011-0217.
Full case history with a free Klarifi account
Every action against Oxford City Of STP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Oxford City Of STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Iowa
Homestead · 6 mi away
0.05 MGD
Tiffin · 7 mi away
0.52 MGD
Amana · 7 mi away
0.12 MGD
Swisher · 9 mi away
0.12 MGD
Coralville · 10 mi away
2.98 MGD
North Liberty · 10 mi away
2.03 MGD
Marengo · 11 mi away
—
Walford · 11 mi away
0.17 MGD
Oxford City Of STP: 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 May 17, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms