Conventional Gravity vs Aerobic Septic Systems
If you're installing or replacing a septic system in the Columbus area, your choice between conventional gravity and aerobic treatment depends on lot conditions, county code, and budget.
Conventional Gravity vs Aerobic Septic Systems
If you're installing or replacing a septic system in the Columbus area, your choice between conventional gravity and aerobic treatment depends on lot conditions, county code, and budget.
| Feature | Conventional Gravity Lower cost, simpler, decades-proven | Aerobic Treatment Unit (ATU) Higher treatment quality, smaller footprint, more maintenance |
|---|---|---|
| Install cost | $8,000-$15,000 | $12,000-$22,000 |
| Lot requirements | Larger drain field; needs good perc | Smaller footprint; works on tight lots |
| Power needed | No (gravity) | Yes (continuous aerator) |
| Maintenance | Pump every 3-5 years | Quarterly inspection + annual filter service |
| Lifespan | 25-50 years | 20-30 years (ATU components shorter) |
| Effluent quality | Standard (handled by drain field) | Cleaner; sometimes surface-discharge eligible |
Our recommendation
Conventional gravity is the right answer for the majority of Greater Columbus lots. We recommend aerobic only when soil conditions or county code require it, typically rural Licking and Pickaway county lots near streams. Aerobic adds $4-7K upfront and about $300/year in ongoing maintenance.
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