Langley Public Works Authority
Langley, OK · Mayes County · Publicly Owned Treatment Works
- Average flow
- 0.05 MGD
- Design flow
- 0.13 MGD
- NPDES permit
- OK0039128
- Effective
- Permit expires
- September 2029
- Population served
- 705
- CWNS 2022
Langley Public Works Authority is a publicly owned wastewater treatment plant in Langley, Mayes County, Oklahoma treating an average of 0.05 million gallons per day against a permitted design capacity of 0.13 MGD, serving about 705 residents. Treatment on site includes clarifiers, aerated lagoons, uncovered lagoons, carrousels / oxidation ditches. It discharges under NPDES permit OK0039128 (effective), which expires in September 2029, with 8 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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Carrousels / oxidation ditches
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Compliance snapshot (last 3 years)
- Total violations
- 8
- Effluent violations
- 8
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Langley Public Works Authority.
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Afton · 18 mi away
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Locust Grove · 18 mi away
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Grove · 19 mi away
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Pryor · 20 mi away
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Langley Public Works 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 April 6, 2025.