Septic care and maintenance
A septic system needs very little — but the little it needs is what decides whether it lasts 15 years or 40.
The short answer
Septic tank maintenance comes down to four habits: pump the tank every three to five years (sooner for large households), have it inspected at least every three years, keep grease, wipes and chemicals out of the drains, and keep vehicles, trees and surface water off the drain field. Additives aren't needed.
In this section
Septic dos and don'ts
| Do | Don't |
|---|---|
| Pump on schedule and keep the receipts | Flush wipes, paper towels, feminine products or cat litter |
| Spread laundry through the week | Pour grease, oil or solvents down the drain |
| Fix running toilets and leaks | Park, drive or build on the drain field |
| Add risers so the lids are easy to reach | Plant trees near the tank or field |
| Send gutters away from the field | Rely on additives instead of pumping |
A simple septic maintenance calendar
- Every month: glance at the drain field and tank area for wet spots or smells, and check that any alarm light is off.
- Every year: have pumped and aerobic systems inspected, test the alarm, and clean the effluent filter if you're comfortable doing it.
- Every three years: a full inspection for a conventional system, with the sludge and scum measured.
- Every three to five years: pump the tank, or on the schedule your measurements support.
- Whenever something changes: more people in the house, a new bathroom, a water softener — recheck the pumping interval.
Do septic additives work?
A working septic tank already contains the bacteria it needs; they arrive with every flush. The EPA and university extension services find no reliable evidence that bacterial or enzyme additives reduce pumping or rescue a failing field, and some chemical products can harm the field by pushing solids out of the tank. Skip them and spend the money on pumping.