Sand filter Septic System Cost in Colorado
Estimated 2026 installed range: $9,200 – $18,400
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Open the cost calculatorWhy Colorado prices differ
Statewide cost drivers here are hard ground, terrain and remote access. Locally, mountain terrain and freeze depth affect tank depth and insulation. That is why a sand filter system in Colorado can land well above or below the national range of $8,000–$16,000.
All system types in Colorado
| System | Low | High |
|---|---|---|
| Conventional | $4,000 | $9,200 |
| Chamber | $5,800 | $12,600 |
| Aerobic / ATU | $9,200 | $20,700 |
| Mound | $11,500 | $25,300 |
| Sand filter | $9,200 | $18,400 |
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.