Aerobic / ATU Septic System Cost in Oregon
Estimated 2026 installed range: $9,800 – $22,000
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Open the cost calculatorWhy Oregon prices differ
Statewide cost drivers here are hard ground, terrain and remote access. Locally, wet winters and strict DEQ rules require careful siting. That is why a aerobic / atu system in Oregon can land well above or below the national range of $8,000–$18,000.
All system types in Oregon
| System | Low | High |
|---|---|---|
| Conventional | $4,300 | $9,800 |
| Chamber | $6,100 | $13,400 |
| Aerobic / ATU | $9,800 | $22,000 |
| Mound | $12,200 | $26,800 |
| Sand filter | $9,800 | $19,500 |
What aerobic / atu systems are for
Aerobic treatment units add oxygen to break down waste faster. They are used on tight or wet lots, require electricity, and need periodic maintenance.