Mound Septic System Cost in Mississippi
Estimated 2026 installed range: $8,500 – $18,700
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Open the cost calculatorWhy Mississippi prices differ
Statewide cost drivers here are high water tables and clay soils. Locally, high water tables are common; aerobic systems are frequently used. That is why a mound system in Mississippi can land well above or below the national range of $10,000–$22,000.
All system types in Mississippi
| System | Low | High |
|---|---|---|
| Conventional | $3,000 | $6,800 |
| Chamber | $4,200 | $9,400 |
| Aerobic / ATU | $6,800 | $15,300 |
| Mound | $8,500 | $18,700 |
| Sand filter | $6,800 | $13,600 |
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.