Cascade Locks STP And WTP
Cascade Locks, OR · Hood River County · Publicly Owned Treatment Works
- Average flow
- 0.12 MGD
- Design flow
- 0.49 MGD
- NPDES permit
- OR0041271
- Effective
- Permit expires
- October 2029
- Population served
- 1,464
- CWNS 2022
Cascade Locks STP And WTP is a publicly owned wastewater treatment works in Cascade Locks, Hood River County, Oregon treating an average of 0.12 million gallons per day against a permitted design capacity of 0.49 MGD, serving about 1,464 residents. It discharges under NPDES permit OR0041271 (effective), which expires in October 2029, with 36 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 36
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Cascade Locks STP And WTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Oregon
Hood River · 16 mi away
0.33 MGD
Hood River · 17 mi away
1.13 MGD
Mount Hood Parkdale · 17 mi away
0.04 MGD
Mosier · 22 mi away
0.07 MGD
Government Camp · 27 mi away
0.06 MGD
Portland · 30 mi away
8.99 MGD
Boring · 30 mi away
0.01 MGD
Estacada · 35 mi away
0.44 MGD
Cascade Locks STP And WTP: 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 October 1, 2025.