Sulphur Municipal Authority
Sulphur, OK · Murray County · Publicly Owned Treatment Works
- Average flow
- 0.58 MGD
- Design flow
- 1.5 MGD
- NPDES permit
- OK0020141
- Effective
- Permit expires
- November 2030
- Population served
- 5,051
- CWNS 2022
Sulphur Municipal Authority is a publicly owned wastewater treatment plant in Sulphur, Murray County, Oklahoma treating an average of 0.58 million gallons per day against a permitted design capacity of 1.5 MGD, serving about 5,051 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit OK0020141 (effective), which expires in November 2030, with 56 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 56
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Sulphur Municipal Authority.
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Sulphur Municipal Authority: 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.