Mound Septic System Cost in Tennessee
Estimated 2026 installed range: $9,200 – $20,200
Get your own estimate in 30 seconds
Open the cost calculatorWhy Tennessee prices differ
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 mound system in Tennessee can land well above or below the national range of $10,000–$22,000.
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 mound systems are for
A mound system raises the drain field above the ground when the water table is high or soil is shallow. It is one of the most expensive common options.