Septic tank making gurgling noise

PlumbingUpdated March 2026

The answer to 'septic tank making gurgling noise' is that a gurgling sound from your septic tank is often a sign of a blockage or problem with the system. This can indicate issues like a clogged septic line, a full septic tank, or a problem with the drain field.

Some common causes of a gurgling septic tank include a buildup of waste, a problem with the septic tank baffles, tree roots infiltrating the system, or a failure in the drain field. The gurgling noise is caused by air being forced back up through the plumbing as the system struggles to properly drain and function.

Sources

National Onsite Wastewater Recycling Association— authority

Septic System Owner's Guide— guide

ASTM International Septic System Standards— reference

Step-by-Step Guide

1
Inspect the septic tank and lines
If you hear gurgling, first inspect the septic tank and connecting pipes for any obvious blockages or issues. You may be able to clear a minor clog yourself, but call a professional if you suspect a more serious problem.
2
Check the drain field
Examine the drain field area for signs of trouble, such as standing water, lush vegetation growth, or sewage odors. Issues with the drain field often contribute to gurgling in the septic system.

Frequently Asked Questions

When should I call a professional for a gurgling septic tank?

It's generally best to call a professional septic tank service if you hear persistent gurgling or notice other signs of a problem, such as slow draining sinks or toilets, standing water around the septic tank or drain field, or sewage odors. Attempting to fix a major septic issue on your own can be dangerous and may make the problem worse.

How can I prevent a gurgling septic tank?

To help prevent a gurgling septic tank, be mindful of what goes down your drains, have the tank pumped regularly (every 3-5 years), and avoid driving or building over the drain field. Proper maintenance and avoiding overloading the system can go a long way in keeping your septic system working properly.

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Septic tank making gurgling noise

Sources

Step-by-Step Guide

Inspect the septic tank and lines

Check the drain field

Frequently Asked Questions

When should I call a professional for a gurgling septic tank?

How can I prevent a gurgling septic tank?

Get help from a local pro

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