Tryon Creek WWTP
Lake Oswego, OR · Clackamas County · Publicly Owned Treatment Works
- Average flow
- 3.51 MGD
- Design flow
- 8.3 MGD
- NPDES permit
- OR0026891
- Effective
- Permit expires
- April 2029
- Population served
- 86,722
- CWNS 2022
Tryon Creek WWTP is a publicly owned wastewater treatment works in Lake Oswego, Clackamas County, Oregon treating an average of 3.51 million gallons per day against a permitted design capacity of 8.3 MGD, serving about 86,722 residents. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit OR0026891 (effective), which expires in April 2029, 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.
Capital improvement projects in Lake Oswego
Lake Oswego's capital improvement plan lists 30 water, sewer and wastewater line items worth $45M starting 2025–2030. The largest budgeted items are shown here.
All water and sewer capital projects in Lake Oswego →
| Project | Budget | Years |
|---|---|---|
| Bergis Water Reservoir Replacement (S-07) | $6,500,000 | 2026–2027 |
| McVey Pump Station Replacement (P-01) (WO 340) | $5,500,000 | 2025–2026 |
| Wastewater Conveyance Rehabilitation | $3,500,000 | 2026–2031 |
| Bryant Woods Water System Improvements | $3,000,000 | 2026–2027 |
| Foothills Road Interceptor (T-L1-1) | $3,000,000 | 2027–2029 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
3 verified contacts for Tryon Creek WWTP, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Tryon Creek WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Oregon
Milwaukie · 1 mi away
1.74 MGD
Tigard · 5 mi away
18.4 MGD
Canby · 9 mi away
0.99 MGD
Portland · 13 mi away
8.99 MGD
Boring · 14 mi away
0.01 MGD
Aurora · 14 mi away
0.08 MGD
Estacada · 17 mi away
0.44 MGD
Hubbard · 18 mi away
0.17 MGD
Tryon Creek 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 March 4, 2025.