Aerobic / ATU Septic System Cost in Florida
Estimated 2026 installed range: $8,400 – $18,900
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Statewide cost drivers here are high water tables and clay soils. Locally, high water tables require mounds or aerobic systems with drain fields raised. That is why a aerobic / atu system in Florida can land well above or below the national range of $8,000–$18,000.
All system types in Florida
| System | Low | High |
|---|---|---|
| Conventional | $3,700 | $8,400 |
| Chamber | $5,200 | $11,600 |
| Aerobic / ATU | $8,400 | $18,900 |
| Mound | $10,500 | $23,100 |
| Sand filter | $8,400 | $16,800 |
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.