Madill Pwa
Madill, OK · Marshall County · Publicly Owned Treatment Works
- Average flow
- 0.43 MGD
- Design flow
- 0.75 MGD
- NPDES permit
- OK0031721
- Effective
- Permit expires
- July 2027
- Population served
- 3,593
- CWNS 2022
Madill Pwa is a publicly owned wastewater treatment plant in Madill, Marshall County, Oklahoma treating an average of 0.43 million gallons per day against a permitted design capacity of 0.75 MGD, serving about 3,593 residents. Treatment on site includes clarifiers, aerated lagoons, uncovered lagoons, biogas silos. It discharges under NPDES permit OK0031721 (effective), which expires in July 2027, with 328 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
- 328
- Effluent violations
- 328
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Madill Pwa, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Madill Pwa, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Oklahoma
Oakland · 1 mi away
0.02 MGD
Kingston · 8 mi away
0.05 MGD
Tishomingo · 10 mi away
0.19 MGD
Ardmore · 20 mi away
2.42 MGD
Mill Creek · 20 mi away
0.0054 MGD
Calera · 23 mi away
0.3 MGD
Ardmore · 23 mi away
—
Colbert · 24 mi away
0.11 MGD
Madill Pwa: 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.