Aerobic / ATU Septic System Cost in South Dakota
Estimated 2026 installed range: $7,200 – $16,200
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Statewide cost drivers here are clay soils and deep frost. Locally, frost depth and remote access affect cost. That is why a aerobic / atu system in South Dakota can land well above or below the national range of $8,000–$18,000.
All system types in South Dakota
| System | Low | High |
|---|---|---|
| Conventional | $3,200 | $7,200 |
| Chamber | $4,500 | $9,900 |
| Aerobic / ATU | $7,200 | $16,200 |
| Mound | $9,000 | $19,800 |
| Sand filter | $7,200 | $14,400 |
What aerobic / atu systems are for
Aerobic treatment units add oxygen to break down waste faster. They are used on tight or wet lots, require electricity, and need periodic maintenance.
Related pages
All septic costs in South Dakota · Aerobic / ATU system overview