What is the address of Mcminnville WWTP?

The address on the plant’s EPA facility record is 3500 NE Clearwater Dr, Mcminnville, OR 97128, in Yamhill County. Its coordinates are 45.2228, -123.1589. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Mcminnville WWTP treat?

Mcminnville WWTP treats an average of 4.99 MGD and is permitted for a design flow of 5.6 MGD.

What treatment technology does Mcminnville WWTP use?

Klarifi has identified 3 treatment structures and unit processes at the Mcminnville facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Mcminnville WWTP?

The facility discharges under NPDES permit OR0034002, currently administratively continued, expiring December 2008.

Is Mcminnville WWTP in compliance?

Discharge monitoring reports show 2 violations at Mcminnville WWTP in the last three years, 1 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Mcminnville WWTP and how do I contact them?

Mcminnville WWTP is a publicly owned treatment works in Mcminnville, Oregon. Klarifi lists 2 verified decision-maker contacts for this facility, available with a free trial.

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Mcminnville WWTP

3500 NE Clearwater Dr, Mcminnville, OR 97128 · Yamhill County · Publicly Owned Treatment Works

Average flow: 4.99 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 4.99 million gallons per day against a permitted design capacity of 5.6 MGD, serving about 34,615 residents. It discharges under NPDES permit OR0034002 (administratively continued), which expires in December 2008, with 2 recorded violations in the last three years.

Treatment technology

3 treatment structures and unit processes identified at Mcminnville WWTP.

Available with a free Klarifi account

See the full treatment train at Mcminnville WWTP: structures, unit processes and planned upgrades, with exact unit counts.

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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.

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Nearby wastewater treatment plants in Oregon

Lafayette STP

Lafayette · 3 mi away

0.42 MGD

Dayton STP

Dayton · 4 mi away

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Carlton STP

Carlton · 5 mi away

0.45 MGD

Amity STP

Amity · 7 mi away

0.29 MGD

Yamhill STP

Yamhill · 8 mi away

0.25 MGD

Dundee STP

Dundee · 8 mi away

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Sheridan WWTP

Sheridan · 14 mi away

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Gervais STP

Gervais · 15 mi away

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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 October 26, 2026; facility record last updated May 24, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms

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