Tishomingo, City Of
Tishomingo, OK · Johnston County · Publicly Owned Treatment Works
- Average flow
- 0.19 MGD
- Design flow
- 0.55 MGD
- NPDES permit
- OK0031992
- Effective
- Permit expires
- April 2029
- Population served
- 3,132
- CWNS 2022
Tishomingo, City Of is a publicly owned wastewater treatment plant in Tishomingo, Johnston County, Oklahoma treating an average of 0.19 million gallons per day against a permitted design capacity of 0.55 MGD, serving about 3,132 residents. Treatment on site includes clarifiers, aerated lagoons, uncovered lagoons, biogas silos. It discharges under NPDES permit OK0031992 (effective), which expires in April 2029, with 31 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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Aerated lagoons
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Uncovered lagoons
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Biogas silos
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Compliance snapshot (last 3 years)
- Total violations
- 31
- Effluent violations
- 31
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Tishomingo, City Of.
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Nearby wastewater treatment plants in Oklahoma
Madill · 10 mi away
0.43 MGD
Oakland · 10 mi away
0.02 MGD
Mill Creek · 14 mi away
0.0054 MGD
Kingston · 16 mi away
0.05 MGD
Wapanucka · 18 mi away
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Ardmore · 23 mi away
2.42 MGD
Calera · 25 mi away
0.3 MGD
Sulphur · 25 mi away
0.58 MGD
Tishomingo, 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 November 18, 2025.