Stillwater, City Of
Stillwater, OK · Payne County · Publicly Owned Treatment Works
- Average flow
- 4.65 MGD
- Design flow
- 10 MGD
- NPDES permit
- OK0027057
- Effective
- Permit expires
- March 2028
- Population served
- 41,163
- CWNS 2022
Stillwater, City Of is a publicly owned wastewater treatment plant in Stillwater, Payne County, Oklahoma treating an average of 4.65 million gallons per day against a permitted design capacity of 10 MGD, serving about 41,163 residents. Treatment on site includes clarifiers, aerated lagoons, biogas silos. It discharges under NPDES permit OK0027057 (effective), which expires in March 2028, with 9 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 9
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Stillwater, City Of, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Stillwater, City Of, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Oklahoma
Perkins · 9 mi away
0.2 MGD
Langston · 17 mi away
0.26 MGD
Yale · 18 mi away
0.02 MGD
Cushing · 19 mi away
0.82 MGD
Perry · 20 mi away
0.24 MGD
Carney · 20 mi away
0.01 MGD
Pawnee · 20 mi away
0.07 MGD
Drumright · 24 mi away
0.41 MGD
Stillwater, City Of: 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 March 2, 2025.