Prineville STP
NW Westview Rd, Prineville, OR 97754 · Crook County · Publicly Owned Treatment Works
- Average flow
- 1.17 MGD
- Design flow
- 1.67 MGD
- NPDES permit
- OR0023612
- Administratively continued
- Permit expires
- December 2016
- Population served
- 10,355
- CWNS 2022
Prineville STP is a publicly owned wastewater treatment works in Prineville, Crook County, Oregon treating an average of 1.17 million gallons per day against a permitted design capacity of 1.67 MGD, serving about 10,355 residents. It discharges under NPDES permit OR0023612 (administratively continued), which expires in December 2016, with 51 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Prineville STP.
Available with a free Klarifi account
See the full treatment train at Prineville STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 51
- 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 Prineville STP.
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Nearby wastewater treatment plants in Oregon
Maupin · 61 mi away
0.06 MGD
Dayville · 68 mi away
0.01 MGD
Dufur · 80 mi away
0.05 MGD
Government Camp · 82 mi away
0.1 MGD
Mount Vernon · 87 mi away
0.02 MGD
Westfir · 89 mi away
0.0036 MGD
Westfir · 90 mi away
0.45 MGD
Mount Hood Parkdale · 91 mi away
0.06 MGD
Prineville STP: 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 October 26, 2026; facility record last updated April 24, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms