Sand filter Septic System Cost in Montana
Estimated 2026 installed range: $8,000 – $16,000
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Open the cost calculatorWhy Montana prices differ
Statewide cost drivers here are hard ground, terrain and remote access. Locally, remote sites and short construction seasons raise labor costs. That is why a sand filter system in Montana can land well above or below the national range of $8,000–$16,000.
All system types in Montana
| System | Low | High |
|---|---|---|
| Conventional | $3,500 | $8,000 |
| Chamber | $5,000 | $11,000 |
| Aerobic / ATU | $8,000 | $18,000 |
| Mound | $10,000 | $22,000 |
| Sand filter | $8,000 | $16,000 |
What sand filter systems are for
A sand filter treats effluent before it reaches the drain field, which helps on poor soil. It adds cost and requires scheduled maintenance.