Calera Pwa
Calera, OK · Bryan County · Publicly Owned Treatment Works
- Average flow
- 0.3 MGD
- Design flow
- 0.35 MGD
- NPDES permit
- OK0031682
- Effective
- Permit expires
- November 2030
- Population served
- 1,939
- CWNS 2022
Calera Pwa is a publicly owned wastewater treatment plant in Calera, Bryan County, Oklahoma treating an average of 0.3 million gallons per day against a permitted design capacity of 0.35 MGD, serving about 1,939 residents. Treatment on site includes aerated lagoons, uncovered lagoons, carrousels / oxidation ditches. It discharges under NPDES permit OK0031682 (effective), which expires in November 2030, with 33 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
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
- 33
- Effluent violations
- 33
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Calera Pwa.
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Nearby wastewater treatment plants in Oklahoma
Durant · 3 mi away
2.1 MGD
Colbert · 6 mi away
0.11 MGD
Kingston · 17 mi away
0.05 MGD
Bokchito · 18 mi away
0.15 MGD
Madill · 23 mi away
0.43 MGD
Oakland · 23 mi away
0.02 MGD
Tishomingo · 25 mi away
0.19 MGD
Wapanucka · 31 mi away
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Calera 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 March 19, 2025.