Aerobic / ATU Septic System Cost in Missouri
Estimated 2026 installed range: $7,000 – $15,800
Get your own estimate in 30 seconds
Open the cost calculatorWhy Missouri prices differ
Statewide cost drivers here are clay soils and deep frost. Locally, rocky ground in the Ozarks can add significant excavation cost. That is why a aerobic / atu system in Missouri can land well above or below the national range of $8,000–$18,000.
All system types in Missouri
| System | Low | High |
|---|---|---|
| Conventional | $3,100 | $7,000 |
| Chamber | $4,400 | $9,700 |
| Aerobic / ATU | $7,000 | $15,800 |
| Mound | $8,800 | $19,400 |
| Sand filter | $7,000 | $14,100 |
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 Missouri · Aerobic / ATU system overview