Aerobic / ATU Septic System Cost in North Carolina
Estimated 2026 installed range: $7,800 – $17,600
Get your own estimate in 30 seconds
Open the cost calculatorWhy North Carolina prices differ
Statewide cost drivers here are high water tables and clay soils. Locally, soil wetness classes determine system type and drain field size. That is why a aerobic / atu system in North Carolina can land well above or below the national range of $8,000–$18,000.
All system types in North Carolina
| System | Low | High |
|---|---|---|
| Conventional | $3,400 | $7,800 |
| Chamber | $4,900 | $10,800 |
| Aerobic / ATU | $7,800 | $17,600 |
| Mound | $9,800 | $21,600 |
| Sand filter | $7,800 | $15,700 |
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.
Related pages
All septic costs in North Carolina · Aerobic / ATU system overview