Inside the House
- Slow drains everywhere, not just one sink. That points to the system, not a single clog
- Gurgling in toilets or drains when other fixtures run
- Sewage odors inside, especially near floor drains in the basement
- Backups in the lowest drains, like a basement shower or floor drain
In the Yard
- Wet or spongy ground over the tank or field when it hasn't rained
- Bright green stripes of grass following the field lines
- Odors outside near the tank or field
- Surfacing liquid, which is a health hazard, so keep people and pets away
Other Clues
A high-water alarm on a pump chamber. A tank that refills from the field side when pumped. Bacteria or nitrate showing up in a nearby well test. Any of these deserves a proper evaluation.
It isn't always the field
A clogged effluent filter, a missing baffle, a blocked line or a failed effluent pump can all look like a dead field. A pro should rule those out first, because they're much cheaper fixes.
What to Do
- Cut water useSpread out laundry, fix leaking toilets, and hold off on long showers.
- Get the tank openedPumping and inspection show whether it's the tank, the filter, the baffles or the field.
- Decide with real informationRepair, partial field work, or replacement, with a design if needed.
Typical ranges: pumping about $300–$600. Drain field repair or replacement about $5,000–$20,000. Full system replacement in New York often about $10,000–$25,000+. See drain field repair and system replacement.
Questions
Can a failing septic system contaminate my well?
It can, especially if the well is close by, shallow, or downhill. If you suspect a septic problem, test your well for bacteria and nitrate as well.
More Guides
Want a Pro to Take a Look?
Call or send the form with your town and what you're seeing.
- Tell us your town and what's happening (backup, alarm, due for pumping, sale)
- If you know it, when the tank was last pumped and where the lid is
- A local septic pro calls back and confirms availability and a typical price range