Aerobic / ATU Septic System Cost in Tennessee
Estimated 2026 installed range: $7,400 – $16,600
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Statewide cost drivers here are high water tables and clay soils. Locally, rocky ground and varied soils require site-specific design. That is why a aerobic / atu system in Tennessee can land well above or below the national range of $8,000–$18,000.
All system types in Tennessee
| System | Low | High |
|---|---|---|
| Conventional | $3,200 | $7,400 |
| Chamber | $4,600 | $10,100 |
| Aerobic / ATU | $7,400 | $16,600 |
| Mound | $9,200 | $20,200 |
| Sand filter | $7,400 | $14,700 |
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 Tennessee · Aerobic / ATU system overview