Colville WWTP
Colville, WA · Stevens County · Publicly Owned Treatment Works
- Average flow
- 0.62 MGD
- Design flow
- 73.1 MGD
- NPDES permit
- WA0022616
- Administratively continued
- Permit expires
- July 2020
- Population served
- 5,369
- CWNS 2022
Colville WWTP is a publicly owned wastewater treatment works in Colville, Stevens County, Washington treating an average of 0.62 million gallons per day against a permitted design capacity of 73.1 MGD, serving about 5,369 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit WA0022616 (administratively continued), which expires in July 2020, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Colville WWTP.
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Ione · 27 mi away
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Metaline Falls · 30 mi away
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Metaline · 32 mi away
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Newport · 47 mi away
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Reardan · 60 mi away
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Davenport · 61 mi away
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Spokane · 62 mi away
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Colville WWTP: 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 20, 2025.