Septic System: lifespan, maintenance and replacement

Typical lifespan: 20–30 years (about 25 years).

Maintenance schedule

• Pump septic tank — Every 3–5 years
• Inspect for leaks and tank levels — Every 1–3 years
• Check drain field for wet spots or odors — Every 6 months
• Avoid flushing non-biodegradable items — Ongoing

Signs it needs replacing

• Sewage backing up into drains
• Persistent foul odor near tank or drain field
• Soggy ground or lush grass over drain field
• Slow drains throughout the house
• Nitrate contamination in well water tests

Tips

Spreading laundry loads throughout the week reduces strain on the septic system.