Mcminnville WWTP
Mcminnville, OR · Yamhill County · Publicly Owned Treatment Works
- Average flow
- 2.73 MGD
- Design flow
- 5.6 MGD
- NPDES permit
- OR0034002
- Administratively continued
- Permit expires
- December 2008
- Population served
- 34,615
- CWNS 2022
Mcminnville WWTP is a publicly owned wastewater treatment works in Mcminnville, Yamhill County, Oregon treating an average of 2.73 million gallons per day against a permitted design capacity of 5.6 MGD, serving about 34,615 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches, biogas silos. It discharges under NPDES permit OR0034002 (administratively continued), which expires in December 2008, with 2 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
- 2
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Mcminnville WWTP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Mcminnville WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Oregon
Lafayette · 3 mi away
0.27 MGD
Dayton · 4 mi away
0.16 MGD
Carlton · 5 mi away
0.2 MGD
Amity · 7 mi away
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Yamhill · 8 mi away
0.07 MGD
Dundee · 8 mi away
—
Sheridan · 14 mi away
—
Gervais · 15 mi away
0.13 MGD
Mcminnville 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 May 24, 2025.