What happens when your septic field is failing?
James Williams
Published Feb 28, 2026
What happens when a septic system fails? A septic system failure causes untreated sewage to be released and transported to where it shouldn’t be. This may cause sewage to come to the surface of the ground around the tank or the drainfield or to back up in pipes in the building.
What causes a drainfield to fail?
A common reason for septic system failure is overloading the system with more water than it can absorb. In particular, water from roofs, roads, or paved areas may be diverted onto the system drainfield. This surface water will saturate the soil to the point that it can no longer absorb additional water.
Can a failed leach field be repaired?
There’s usually no repair for a drainfield that has failed. You probably need to replace some or all of your system.
How do you fix a flooded septic field?
Use a chlorine solution of a half cup of chlorine bleach to each gallon of water to disinfect the area thoroughly. Pump the septic system as soon as possible after the flood. Be sure to pump both the tank and lift station. This will remove silt and debris that may have washed into the system.
How do you tell if the leach field is clogged?
Stay vigilant for five signs your drainfield does not drain correctly anymore.
- Slowing Drainage. Homeowners first notice slower than usual drainage from all the sinks, tubs, and toilets in a home when they have a compromised drainfield.
- Rising Water.
- Increasing Plant Growth.
- Returning Flow.
- Developing Odors.
How long does it take for a septic field to fail?
Reducing water use can help ease the load on a failing drain field, but sometimes drastic reductions in consumption – as much as one-third – may be required to reverse an impending septic field failure. Reversing septic field failure also takes time – measured in years. Most people don’t have years to rehabilitate a septic field.
Can a septic system have a drain field problem?
A drain field problem could either mean it needs repairs or it needs to be replaced altogether. Unfortunately, there is no definitive way to diagnose this issue without examining the different parts of your septic system. You’ll have to call your trusted professional to confirm the problem.
What to do if your septic tank is failing?
Reducing water use can help ease the load on a failing drain field, but sometimes drastic reductions in consumption – as much as one-third – may be required to reverse an impending septic field failure. Reversing septic field failure also takes time – measured in years.
Can a blocked drain cause a back up in septic tank?
Sewage brings contaminants that can make you sick. If you think that you may be experiencing this problem, it could be an issue with the drain field. A blocked drain or pipe could cause a back-up, which could eventually need repairs. However, this too could be a quick fix if it’s a problem with the septic tank. Don’t misdiagnose the problem.