Mound Septic System Cost in North Dakota
Estimated 2026 installed range: $9,500 – $20,900
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Open the cost calculatorWhy North Dakota prices differ
Statewide cost drivers here are clay soils and deep frost. Locally, deep frost and remote sites raise costs. That is why a mound system in North Dakota can land well above or below the national range of $10,000–$22,000.
All system types in North Dakota
| System | Low | High |
|---|---|---|
| Conventional | $3,300 | $7,600 |
| Chamber | $4,800 | $10,400 |
| Aerobic / ATU | $7,600 | $17,100 |
| Mound | $9,500 | $20,900 |
| Sand filter | $7,600 | $15,200 |
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.